7sa522 catalogue

SIPROTEC 47SA522

Distance Protection Relay forTransmission Lines

Protection Systems

Catalog SIP 4.2 • 1999

SIPROTEC 47SA522

Distance Protection Relay

for Transmission Lines

Protection Systems

Functions Pages 12 to 17

Typical fields application Pages 18 to 20

Siemens AG 1999

Description/Overview Pages 2 to 11

Technical data Pages 21 to 31

Advantages to you Cost-effectiveness,

high degree of automation

User-friendly operation

Low planning and engineeringeffort

Fast, flexible mounting,reduced wiring

Simple, short commissioning

Simple spare part stocking,high flexibility

High reliability and availability

State-of-the-art technology

Compliance with internationalstandards

Integration in the overall system

SIPROTEC 4-SICAM-SIMATIC

Selection andordering data Pages 32 and 33

Firmware V4

Catalog SIP 4.2 • 1999

Accessories 4

Trip time curves Page 35

Connection diagrams Pages 36 to 41

Dimension drawings Pages 42 to 44

SIPROTEC 4 – 7SA522Distance Protection Relay for Transmission Lines

Description

Application

The 7SA522 relay providesfull scheme distance protec-tion and incorporates all func-tions usually required for theprotection of a power line.The relay is designed to pro-vide fast and selective faultclearance on transmissionand subtransmission over-head lines and cables. Thiscontributes towards impro-ved stability and availabilityof your electrical powertransmission system. The po-wer system star point canbe solid or impedance groun-ded (earthed). The 7SA522 issuitable for single- andthree-phase tripping applica-tions with and without pilot-(tele-) protection schemes.

The effect of apparent impe-dances in unfaulted faultloops is eliminated by asophisticated and improvedmethod which uses patternrecognition with symmetricalcomponents and load com-pensation. The correct phaseselection is essential for se-lective tripping and reliablefault location.

During network powerswings an improved powerswing blocking feature pre-vents the distance protectionfrom unwanted tripping andoptionally provides controlledtripping in the event of lossof synchronism (out of step).This function guarantees po-wer transmission even undercritical network operatingconditions.

Maximum Lifetime andReliability

The 7SA522 hardware is ba-sed on 20 years of experi-ence by Siemens with nume-rical protection. State-of-the-art 32 bit microprocessortechnology is employed.Naturally the device complieswith the latest standards andtechniques for electromagne-tic compatibility. The overallnumber of electronic compo-nents is substantially redu-ced by using large-scale inte-grated circuits.

The relay software is desig-ned in accordance with highlevel programming languagetechniques. The long experi-ence in manufacturing nume-rical relays provide the basis

for a modern software struc-ture. This along with modernmanufacturing techniquesand quality controls ensuremaximum lifetime and relia-bility.

Cost-effective powersystem management

The SIPROTEC 4 units arenumerical relays which alsoprovide control and monito-ring functions and thereforesupport the user in view of acost-effective power systemmanagement. They contribu-te towards the reliablesupply of electric power tothe customers.

Local operation has been de-signed according to ergono-mic criteria. Large, easy-to-read displays are a major de-sign aim.

The SIPROTEC 4 units havea uniform design and a de-gree of functionality whichrepresents a whole newlevel of quality in protectionand control. If the applicati-on requirements change therelays may be adaptedquickly by entering new set-tings without any additionalhardware costs.

The use of powerful micro-controllers and the applica-tion of digital measured valueconditioning and processinglargely suppresses the influ-ence of higher-frequencytransients, harmonics andDC components.

Back-up protection

The unit can also be used asbackup distance and overcur-rent protection for all typesof differential protectionequipment.

Add-on protectivefunctions

The 7SA522 incorporates se-veral protective functionsusually required for transmis-sion line protection. Theseare

− High-resistance earth faultprotection

− Phase overcurrent protec-tion

− STUB bus overcurrent sta-ge

2 Siemens SIP 4.2 · 08/99

− Overvoltage protection

− Automatic reclosure

− Synchrocheck

− Circuit breaker failure pro-tection.

Programmable logic

The integrated programma-ble logic functions allow theuser to implement his ownfunctions for the automationof a switchgear (interlocking)or a substation via a graphicuser interface. The user canalso generate user-definedmessages and logical combi-nations of internal or externalsignals.

Local and remotecommunication

The SIPROTEC 4 units provi-de several serial communica-tion interfaces for varioustasks:

− Front interface for connec-ting a PC

− IEC system interface forconnecting to a controlsystem viaIEC 60870-5-103 orProfibus-FMS/DP,Modbus RTU,DNP3.0

− Prepared for Ethernet(UCA)

− Modem interface for con-necting a PC via modemand/or starcoupler

− Time synchronization viaIRIG-B/SCADA (DCF 77)

The 7SA522 relay has twoadditional optional interfacesfor communication with theremote relay or process bus.It is therefore well preparedfor future communicationstandards.

Operational indicationsand fault indications withtime stamp

The SIPROTEC 4 units provi-de extensive data for faultanalysis as well as control.All indications listed beloware protected against powersupply failure.

− Fault event recordThe last eight fault casesare always stored in theunit. All fault recordingsare time stamped with aresolution of 1 ms.

− Operational indicationsAll indications that are notdirectly associated withthe fault (e.g. operating orswitching actions) are sto-red in the status indicationbuffer. The time resoluti-on is 1 ms.

Reliable batterymonitoring

The internal battery is usedto back-up the clock, swit-ching statistics, status andfault indications and fault re-cording in the event of a po-wer supply failure. Its func-tion is checked by the pro-cessor at regular intervals. Ifthe capacity of the battery isfound to be declining, analarm is generated. Routinereplacement is therefore notnecessary. All setting para-meters are stored in theFlash-EPROM, and thereforenot lost if the power supplyor battery fails.

User-friendly localoperation

Many advantages can alreadybe found on the clear anduser-friendly front panel:

Positioning and grouping ofthe keys support the naturaloperating process.

A large non-reflective back-litdisplay provides clearinformation display.

Programmable (freely assign-able) LED’s for importantmessages are provided. Ar-row keys ensure an easy na-vigation in the function tree.

Operator-friendly input of theset values via the numerickeys or DIGSI 4 is provided aswell as four programmablekeys for frequently usedfunctions at the push of a but-ton.

Siemens SIP 4.2 · 08/99 3

Operational measuredvalues

The large scope of measuredand limit values permits im-proved system managementas well as simplified commis-sioning.

Control

The integrated control functi-ons permit control of circuitbreakers or isolators (electri-cally operated/motorized dis-connectors) via the integra-ted operator panel, binary in-puts, DIGSI 4 or the substati-on control system (e.g.SICAM).

A full range of control execu-tion functions is provided.

Time synchronization

A battery backed clock is al-ways provided and can besynchronized via a synchro-nization signal (DCF77,IRIG-B via satellite receiver),binary input, system inter-face or SCADA (e.g. SICAM).A date and time is assignedto every indication.

Assignable binary inputsand outputs

Binary inputs, outputs andLED’s can be assigned toperform specific functions asdefined by the user.

Selectable function keys

Four function keys can be as-signed to permit the user toperform frequently recurringactions very quickly andsimply.Typical applications are, forexample, jumps to a givenposition in the menu tree inorder to display the list ofoperating indications or toperform automatic functions,such as ”Switching of cir-cuit-breaker”.

Continuous self-monitoring

The hardware and softwarecomponents are continuouslymonitored. If abnormal condi-tions are detected, the unitsignals them immediately. Inthis way, a high level of safe-ty, reliability and availability isachieved.

52Local/Tele Ctrl.Commands

CB Indications

74TC

Trip Circuitsupervision

86

Lockout

21

Distance

21N

6868T

Power

Swing

FL

FaultLocator

50N51N

GndO/C

67N

DirectionalGround

5051

Over-current

50N-251N-2

85-21

Pilot

Dist.

85-67N

Pilot

Gnd

50HS

Switch

onto-Flt. O/C

50STUB

STUBO/C

Weak

infeed

27WI 25

Synchro-check

79Auto-

reclosure

59

Over-

voltage

50BF

Bkr.

fail.

Operat.values

Super-

visionPilot schemes can useone channel or tworedundant channels to

the remote end

Serial Communication

Interfaces

CFC Logic

Note: Pilot schemes = Teleprotection

Figure 1

Single line diagram


Description

Local operation

All operator actions can beexecuted and informationdisplayed via an integrateduser interface.

On the LCD display,substation and device in-formation can be displayedas text in various lists.Frequently displayed infor-mation includes measuredanalog values, binary infor-mation about the state of theswitchgear and the device,protection information, gen-eral indications and alarms.

14 assignable (configurable)LEDs are used to displayplant or device information.The LEDs can be labelledaccording to user require-ments. An LED reset key re-sets the LEDs.

4 configurable function keyspermit the user to executefrequently used actions sim-ply and fast. Typical applica-tions include jumps to cer-tain points in the menu treeto display the operationalmeasured values, or execu-tion of automatic functionssuch as: ”Operate the cir-cuit-breaker”.


RS232 operator interface

Numerical keys for easy data entry

Figure 2

Front view SIPROTEC 4 7SA522

Keys for navigation

Description

Connection techniquesand housing with manyadvantages

1/2 and 1/1-rack sizes: Theseare the available housingwidths of the SIPROTEC 47SA522 relays, referred to a19" module frame system.This means that previousmodels can always be repla-ced. The space required inthe switchgear cubicle is thesame. The height is a uni-form 243 mm (9.57 inches)for all housing widths. Allcables can be connectedwith or without ring lugs.Plug-in terminals are avail-able as an option.

Figure 5

Rear view with terminal covers andwiring

Figure 4

Rear view with screw terminals and serialinterfaces


Figure 3

Housing widths 1/2 x 19’‘ and 1/1 x 19’‘

Figure 6 DIGSI 4 – Main menu

Figure 7 DIGSI 4 – Device configuration

Figure 8 DIGSI 4 – Configuration matrix

DIGSI 4

The PC operating programDIGSI 4 is the interface bet-ween the user and theSIPROTEC 4 units. It has amodern PC operator inter-face in accordance with theWindows versions 95/98/NT4.0. With DIGSI 4 theSIPROTEC 4 units can beconfigured and interrogated -it is a tailored program for theelectrical supply industries.


DIGSI 4 matrix

The DIGSI 4 matrix providesthe user with an overall viewof the unit configuration at aglance. For example, all LEDsand the configuration of thebinary inputs and output re-lays are displayed in a singlechart. And with one click ofthe mouse button connec-tions can be made.


DIGSI 4 Operating Program


DIGSI 4 Operating Program

Convenient protectionfunctions setting:Secondary or Primary

The settings can be enteredand displayed as secondaryor primary values. Switchingbetween secondary and pri-mary is done by clicking onthe corresponding symbol inthe tool bar.

Commissioning

Special attention has beenpaid to commissioning. Allbinary inputs and output con-tacts can be displayed andactivated directly. This cansimplify the wiring checksignificantly for the user.

CFC: Programming logic

With the help of the CFC gra-phic tool (Continuous Func-tion Chart) interlocks andswitching sequences can beconfigured simply via dragand drop of logic symbols; nospecial knowledge of soft-ware is required. Logical ele-ments, such as AND, OR,flip-flops and timer elementsare available. The user canalso generate user-definedannunciations and logicalcombinations of internal orexternal signals.

Figure 9

CFC (Continuous Function Chart)

The new DIGSI 4 Easy to learn

Clear layout of routing matrix

Substation, feeder and equipmentdata management

Password protection

Linked with the SICAM/SIMATICsoftware environment

Windows standards



Figure 11

Systems control bus and service bus

Figure 10

SICAM/SIPROTEC 4 architecture

Office

Modemaccess

Rear of unit

SIPROTEC 4Front interface

Systemscontrol

SICAM/SIPROTEC 4

Database

SICAM WinCC

DIGSI 4

SICAM plusTOOLS

Bay control units

Datamanage-ment

Software Communi-cation

Various commu-nication protocols

SCADA

CPU

Central I/O

Protection devices

IEC 60870-5-103/Profibus-FMS

ServiceBus

System SIPROTEC 4/SICAM

SIPROTEC 4 as an integral partof SICAM energy automationsystem

SIPROTEC 4 is tailor-made for usein the SIMATIC-based SICAMenergy automation system. TheSICAM family consists of the fol-lowing components:

− SICAM RTU, the modern tele-control system with automationand programmable logic functi-ons

− SICAM SAS, the modern inte-gration of switchgear automati-on and information technology

− SICAM PCC, the informationand communication technologyon a PC basis

Data management and communi-cation is one of the strong pointsof the SICAM and SIPROTEC 4system. Powerful engineeringtools (SICAM plus TOOLS basedon STEP7 and SICAM Win CC)make working with SICAM con-venient. The SIPROTEC 4 unitsare optimally matched for use inSICAM SAS and SICAM PCC.With SICAM and SIPROTEC 4continuity exists at three centralpoints:

− Data management

− Software architecture

− Communication.

All central system components(SICAM and SIPROTEC 4 CPUs,SICAM WinCC, SICAM plusTOOLS, bay controllers and pro-tection equipment), as well as theDIGSI 4 operating program, areestablished on the same basis.The ability to link SICAM/SIPRO-TEC and other components of thesubstation control, protection andautomation is assured via openinterfaces, such asIEC 60870-5-103 or PROFIBUS.

Service interface

The service interface can be usedas a 2nd operating interface.DIGSI 4 offers the additional pos-sibility of accessing bay control-lers via modem. Thus the fullrange of DIGSI 4 functionality isavailable at the office desk orwhen travelling (by laptop and mo-dem). This permits rapid and ex-tensive access for the service per-sonnel. All settings and controlcommands are available and it ispossible to read the operationaland fault event logs, fault recordsas well as operational measuredvalues.

Rear of unit


Rear of unit


Service vehicle

Star coupler

All SIPROTEC units operate alsowith the proven star coupler. Thestar coupler is used for simpleapplications which also give theuser an alternative method ofretrieving information remotely.


SIPROTEC 4/SICAM system

Figure 12

SICAM SAS communication structure

SICAM WinCCOperation and monitoringarchive, configuration station

Telecontrol interafce tosystem control centers(e.g. IEC 60870-5-101)

DIGSI 4

Automationsystems(e.g. SIMATIC)

Time synchro-nisationDCF77, GPS

SICAM SC

IEC 60870-5-103

Profibus FMS

ControlProtection/control

Protection1) Protection and control 2) Protection and control

in seperate units. in one unit.

2) 2) 1) 2) 1) 2)

1)

7SJ61/62 6MD/7SJ63 6MB525 7SJ61/62 6MD63 7SJ637SJ61/626MD63

IEC 60870-5-103

Figure 13

Communication via star coupler

7SJ6007SA5117UT51SD517SJ51

6MB525


10 Siemens SIP 4.2 · 08/99

Digital communication

With respect to communica-tion, particular emphasis isplaced on the customer re-quirements in energy auto-mation:

− Every data item is time-stamped at the source, i.e.where it originates.

− The communication sy-stem automatically handlesthe transfer of large datablocks (e.g. fault recor-dings or parameter datafiles). The user has accessto these features withoutany additional program-ming effort.

− For the safe execution of acontrol command the cor-responding data telegramis initially acknowledged bythe device which will exe-cute the command. Afterthe release and executionof the command a feed-back signal is generated.At every stage of the con-trol command executionparticular conditions arechecked. If these are notsatisfied, command execu-tion may be terminated in acontrolled manner.

Local PC interface

The PC interface accessiblefrom the front of the unit per-mits quick access to all para-meters and fault event data.The use of the DIGSI 4 opera-ting program is particularlyadvantageous during com-missioning.

Remote relay interface (**)

Most pilot- (tele-) protectionschemes could be implemen-ted using digital serial com-munication. The 7SA522 iscapable of remote relaycommunication via directlinks or multiplexed digitalcommunication networks.

Safe bus architecture forsubstation controlinterface

RS485 busWith this data transmissionvia copper conductors,electromagnetic fault influ-ences are largely eliminated

by the use of twisted-pairconductors. Upon failure ofa unit, the remaining sy-stem continues to operatewithout any problem. Fiber optic double ring

circuitThe fiber optic double ringcircuit is almost immune toelectromagnetic interfe-rence. Upon failure of a sec-tion between two units, thecommunication system con-tinues to operate withoutdisturbance. It is generallyimpossible to communicatewith a unit that has failed. Ifa unit were to fail, there isno effect on the communi-cation with the rest of thesystem.

Retrofitting: Modules forevery type of commu-nication

Communication modules areavailable for the entireSIPROTEC 4 unit range. Thisensures that a range of com-munication protocols can beused. No external converteris required.

IEC 60870-5-103

IEC 60870-5-103 is an interna-tionally standardized protocolfor efficient communicationwith protection relays. IEC60870-5-103 is supported bya number of protection de-vice manufacturers and isused world-wide.

PROFIBUS-FMS (*)

PROFIBUS-FMS is an interna-tionally standardized commu-nication system (EN 50170)for communication problemsolving. Profibus is supportedinternationally by severalhundred manufacturers andhas to date been used inmore than 1,000,000 applica-tions all over the world.Connection to a SIMATICS5/S7 programmable control-ler is made on the basis ofthe data obtained (e.g. faultrecording, fault data, measu-red values and control func-tionality) via the SICAMenergy automation system.

Figure 14

IEC 60870-5-103 star type RS232 copper conductor connection or fiberoptic connection

Figure 15

Profibus: Optical double ring circuit

Figure 16

Profibus: RS485 copper conductor connection

OLM1)

Communication

(*) available with next firmware release(**) in preparation1) Optical Link Module

Siemens SIP 4.2 · 08/99 11

Profibus DP (*)

Profibus DP is an industrialcommunications standardand is supported by anumber of PLC and protec-tion device manufacturers.

Modbus RTU (*)

Modbus RTU is a recognizedindustrial communicationsstandard and is supported bya number of PLC and protec-tion device manufacturers.

DNP 3.0 (*)

DNP 3.0 (Distributed Net-work Protocol version 3) is acommunications protocolbased on messages. TheSIPROTEC 4 units are fullyLevel 1 and Level 2 compli-ant with DNP 3.0. DNP 3.0 issupported by a number ofprotection device manufac-turers.

Ethernet UCA (**)

UCA (Utility CommunicationsArchitecture) is a developingcommunications protocolspecifically designed for sub-station automation. When itbecomes an internationalstandard, the SIPROTEC 4units are prepared to supportit. Simply plug in a new com-munication module.

Communication

Figure 17

Optical fiber communication module

Figure 18

RS232/RS485 electrical communication module

Figure 19

Fiber optical double ring communication module

(*) available with next firmware release(**) in preparation


12 Siemens SIP 4.2 · 08/99

Figure 21

Distance protection: MHO characteristic

Distance protection(ANSI 21, 21N)

Full-scheme design

The main function of the7SA522 is a full-scheme di-stance protection. By parallelcalculation and monitoring ofall six impedance loops ahigh degree of sensitivity andselectivity is achieved for alltypes of faults. The shortesttripping time is less than onecycle. Single- and three- poletripping is possible.

MHO and quadrilateralcharacteristics

The 7SA522 relay providesquadrilateral as well as MHOzone characteristics. Bothcharacteristics can be usedseparately for phase andground faults. Resistanceground faults can for instan-ce be covered with thequadrilateral characteristicand phase faults with themho characteristic.

Load bias

In order to guarantee a relia-ble discrimination betweenload operation and short cir-cuit – especially on long highloaded lines – the relay isequipped with a selectableload encroachment characte-ristic. Impedances within thisload encroachment charac-teristic will prevent the dis-tance zones from unwantedtripping.

Absolute phase-selectivity

The 7SA522 distance protec-tion incorporates a well pro-ven highly sophisticated pha-se selection algorithm. Thepickup of unfaulted loops iseliminated to prevent theadverse influence of currentsand voltages in the fault freeloops. This phase selectionalgorithm achieves singlepole tripping and correct di-stance measurement in awide application range.

Parallel line compensation

The influence of wrong di-stance measurement due toparallel lines can be compen-sated by feeding the neutralcurrent of the parallel line to

the relay. Parallel line com-pensation can be used for di-stance protection as well asfor the fault locator.

6 zone packages

Five independent distancezones and one separateoverreach zone for zoneextension schemes areavailable. Each distance zonehas separate time stages,partly valid for single phaseor multi-phase faults.Ground faults are detectedby monitoring the neutralcurrent 3I0 and the zero se-quence voltage 3V0.

Quadrilateral

The quadrilateral trippingcharacteristic permits sepa-rate setting of the reactanceX and the resistance R. Theresistance section R can beset separately for faults withand without ground involve-ment. This characteristic hastherefore an optimal perfor-mance in case of faults withfault resistance. The distancezones can be set forward, re-verse or non-directional.Sound phase polarization andvoltage memory provides adynamically unlimited direc-tional sensitivity.

MHO

The mho tripping characteris-tic provides sound phase res-pectively memory polariza-tion for all distance zones.The example in figure 21shows the characteristic for aforward fault where the mhocircle expands to the sourceimpedance but never morethan the selected impedancereach. This mho circle expan-sion guarantees safe and se-lective operation for all typesof faults even for close-infaults.

Insensitive to measuringvalue distortion

Digital filtering of themeasured values makes theprotection unit insensitive todisturbances in the measu-red quantities. In particularthe influence of DC compo-nents, capacitive voltagetransformers and frequencychanges are reduced.

Functions

X

R

forwards

forw

ard

s

revers

e

reverse

ϕ LoadLoad

Z1

Z2

Z4

Z3

Z1B

Z5

Line

α

X

R

ϕ

Z1

Z2

Z4

Z1B

Z5

Line

Z3 (if revers)

Load Load

Figure 20

Distance protection: quadrilateral characteristic

Fuse failure monitoring

The loss of the secondaryV.T. circuit voltage blocks thedistance protectionautomatically and preventsthe relay from unwantedtripping. The secondary V.T.voltage is supervised by theintegrated fuse failuremonitor. A pickup of the fusefailure monitor as well as the

V.T.-mcb binary input blockthe distance protection andcan act ivate the backupovercurrent protection.

Siemens SIP 4.2 · 08/99 13

Functions

A serial remote relay interfaceis in preparation for direct con-nection to a digital communi-cation network

7SA522 also permits the trans-fer of phase-selective signals.This function requires threechannels for each direction.

This feature is particularly ad-vantageous as it permits toexecute reliable single-pole trip-ping, even if two single-phasefaults occur on different lines.The transmission methods aresuitable also for lines with threeends (three-terminal lines). Pha-se-selective transmission isalso possible with multi-endapplications, if some user spe-cific linkages are implementedby way of the integrated CFCLOGIC. During disturbances inthe transmission receiver or onthe transmission circuit, the pi-lot protection function can beblocked by a binary input signalwithout loosing the zone selec-tivity. The control of the overre-ach zone Z1B (zone extension -can be switched over to the au-toreclosure function. A transi-ent blocking function (Currentreversal guard) is provided toovercome current reversals re-sulting from the clearance ofshort circuits on parallel lines.

Figure 22

Power swing current and voltage wave forms

Direct transfer tripping

There are various conditionson the power system whichnecessitate the remote trip-ping of the circuit breakerfrom the protection position.The 7SA522 relay is equip-ped with phase-selective in-tertripping signal inputs andoutputs.

Figure 23

Power swing circle diagram

Fault locator

The integrated fault locator cal-culates the fault impedanceand the distance-to-fault. Theresult is displayed in ohms, mi-les, kilometers or in percent ofthe line length. Parallel line andload current compensation isalso available.

Power swing detection(ANSI 68, 68T)

Dynamic occurrences, for in-stance short circuits, load fluc-tuations, autoreclosures orswitching operations can causepower swings in the transmis-sion network. During powerswings, large currents alongwith small voltages can causeunwanted tripping of distanceprotection relays. To avoid un-controlled tripping of the dis-tance protection and to achievecontrolled tripping in the eventof loss of synchronism the7SA522 relay is equipped withan efficient power swing de-tection function. Power swingscan be detected under symme-trical load conditions as well asduring single pole autoreclosu-res.

Pilot- (Tele-) protection fordistance protection(ANSI 85-21)

A pilot protection function isavailable for fast clearance offaults up to 100% of the linelength. The following operatingmodes may be selected:

− PUTT, permissive underre-aching zone transfer trip

− POTT, permissive overre-aching zone transfer trip

− UNBLOCKING

− BLOCKING

− DUTT, direct underreachingzone transfer trip (togetherwith Direct Transfer Tripfunction)

The carrier send and receivesignals are available as binaryinputs and outputs and can beassigned freely to each physi-cal relay input or output. Atleast one channel is requiredfor each direction.

Common transmission chan-nels are power-line carrier, mi-crowave radio and fiber-opticlinks.


Functions

14 Siemens SIP 4.2 · 08/99

Figure 24

Normal inverse

Weak infeed protection:echo and/or trip(ANSI 27 WI)

To prevent delayed trippingof permissive schemesduring weak or zero infeedsituations, an echo functionis provided. If no faultdetector is picked up at theweak infeed end of the line,the signal received here isreturned as echo to allowaccelerated tripping at thestrong infeed end of the line.It is also possible to initiatetripping at the weak infeedend. A phase-selective 1-poleor 3-pole trip is issued if apermissive trip signal (POTTor Unblocking) is receivedand a if the phase-ground(earth) voltage drops cor-respondingly.

Directional ground (earth)fault overcurrent protec-tion for high-resistancefaults(ANSI 50N, 51N, 67N)

In grounded (earthed) net-works the sensitivity of theground distance protectionmay not cover ground faultswith high fault resistances.The 7SA522 protection relayhas therefore protectionfunctions for high-resistanceground faults of this nature.

The ground fault overcurrentprotection can be used with3 definite time stages andone inverse time stage(IDMT). A 4th definite timestage can be applied insteadof the one inverse timestage.

The available ANSI/ IEEE in-verse-time curves are:

• Inverse• Short inverse• Long inverse• Moderately inverse• Very inverse• Extremely inverse• Definite inverseAn additional logarithmic in-verse time characteristic isalso available.

The direction decision is per-formed with the neutral cur-rent and the zero sequencevoltage or with the negativesequence components V2and I2. In addition or as analternative to the directionaldetermination with zero

sequence voltage, the star-point current of a groundedpower transformer may alsobe used for polarization. Dualpolarization applications cantherefore be fulfilled. Eachovercurrent stage can be setin forward or reverse direc-tion or for both directions(non-directional).

As an option the 7SA522relay can be provided with asensitive neutral (residual)current transformer. Thisfeature provides a measuringrange for the neutral (residu-al) current from 5mA to 100Awith a nominal relay currentof 1A and from 5 mA to 500Awith a nominal relay currentof 5A. Thus the ground faultovercurrent protection can beapplied with extremesensitivity.

The function is equippedwith special digital filter algo-rithms, providing the elimina-tion of higher harmonics.This feature is particularly im-portant for low zero sequen-ce fault currents which usual-ly have a high content of 3rd

and 5th harmonic. Inrush sta-bilization and instantaneousswitch-onto-fault trip can beactivated separately for eachstage as well.

Different operating modescan be selected. The groundfault protection may beblocked during the dead timeof single-pole autoreclose cy-cles or during pickup of thedistance protection.

Pilot protection fordirectional ground (earth)fault protection(ANSI 85-67N)

The directional ground faultovercurrent protection can becombined with one of the fol-lowing pilot schemes:

• Directional comparison• BLOCKING• UNBLOCKING.The transient blocking func-tion (current revresal guard)is also provided to overcomecurrent reversals resultingfrom the clearance of shortcircuits on parallel lines.

The pilot functions for dis-tance protection and forground (earth) fault protec-

tion can use the same sig-nalling channel or two sepa-rate and redundant channels.

Backup overcurrentprotection(ANSI 50, 50N, 51, 51N)

The 7SA522 provides abackup overcurrent protec-tion. Two definite timestages and one inverse timestage (IDMTL) are available,separately for phase currentsand for the neutral (residual)current. Two operatingmodes are selectable. Thefunction can run in parallel tothe distance protection oronly during interruption ofthe voltage in the secondaryVT circuit (emergency opera-tion).

The secondary voltage inter-ruption can be detected bythe integrated Fuse Failuremonitor or via a binary input

of a VT miniature circuitbreaker (VT m.c.b. trip).

The available ANSI/ IEEE in-verse-time curves are:

• Inverse• Short inverse• Long inverse• Moderately inverse• Very inverse• Extremely inverse• Definite inverse

STUB bus overcurrentprotection(ANSI 50(N)-STUB)

The STUB bus overcurrentprotection is a separatedefinite time overcurrentstage. It can be activatedfrom a binary input signallingthe open line isolator (discon-nector).

Settings are available forphase and ground (earth)faults.

( )t

I IT

P

P=

−⋅014

10 02

.

/.

Siemens SIP 4.2 · 08/99 15

Functions

Instantaneous high-speedswitch-onto-fault overcur-rent protection(ANSI 50HS)

Instantaneous tripping is pos-sible when energizing a faul-ty line. On definite large-faultcurrents, the high-speedswitch-onto-fault overcurrentstage can initiate very fast 3-pole tripping.

With lower fault currents, in-stantaneous tripping afterswitch-onto-fault is also pos-sible with the overreach di-stance zone Z1B or just withpickup in any zone.

The switch-onto-fault initiati-on can be detected via thebinary input ”manual close”or automatically via mea-surement.

Overvoltage protection(ANSI 59)

Impermissible overvoltagescan occur on long transmissi-on lines without or with lowload. The 7SA522 protectionrelay contains an overvoltageprotection function. Two sta-ges are available: One phase-segregated stage and onezero-sequence voltage stage.The residual voltage from abroken-delta VT winding canbe directly measured via theV4-voltage transformer input(Ven-voltage) or can becalculated internally as 3V0.Tripping can be performed atthe local circuit breaker or atthe remote end of the line bysending an intertripping si-gnal.

Breaker failure protection(ANSI 50BF)

The 7SA522 relay incorpora-tes a two-stage circuit-brea-ker failure protection to de-tect failures of tripping com-mands execution, for examp-le due to a defective circuit-breaker. The current detec-tion logic is phase-segrega-ted and can therefore also beused in single-pole trippingschemes. If the fault currenthas not been interrupted af-ter a settable time delay is

expired, a retrip command orthe busbar trip command isgenerated. The breaker failu-re protection can be initiatedby all integrated protectionfunctions as well as by exter-nal devices via binary inputsignals.

Automatic reclosing(ANSI 79)

The 7SA522 relay is equip-ped with an automatic reclo-sing function (AR). The func-tion includes several opera-ting modes:

• 3-pole auto reclosing for alltypes of faults; differentdead times are available de-pending the type of fault

• 1-pole auto reclosing for 1-phase faults, no reclosingfor multi-phase faults

• 1-pole auto reclosing for 1-phase faults and for 2-phasefaults without earth, no -reclosing for multi-phasefaults

• 1-pole auto reclosing for 1-phase and 3-pole auto reclo-sing for multi-phase faults

• 1-pole auto reclosing for 1-phase faults and 2-phasefaults without earth and 3-pole auto reclosing for otherfaults

• Multiple-shot auto reclosing• Interaction with an external

device for automatic reclo-sing via binary inputs andoutputs

• Control of the integrated ARfunction by external protec-tion

• Interaction with the internalor an external synchronismcheck

• Monitoring of the circuit-breaker auxiliary contacts

• Voltage check for discrimi-nation between successfuland non-successful recloseattempts

In addition to the above men-tioned operating modes, se-veral other operating princip-les can be performed bymeans of the integrated pro-grammable logic (CFC).

Synchronism check(ANSI 25)

The synchronism and voltagecheck function will ensurethat the stability of the net-work will not be endangeredwhen a line is switched ontoa busbar. For this purpose asynchronism check functionis provided. After verificationof the network synchronismthe function enables theCLOSE command. Alternati-vely reclosing can be enabledfor different criteria, e.g.checking that the busbar orline is not carrying a voltage(dead line or dead bus).

Fuse-failure monitoringand other supervisionfunctions

The 7SA522 relay providescomprehensive monitoringfunctions covering both hard-ware and software. Further-more, the measured valuesare continuously checked forplausibility. Thus the currentand voltage transformers arealso included in this monito-ring system.

If any measured voltage isnot present due to short cir-cuit or conductor breakage inthe voltage transformer se-condary circuit the distanceprotection would react in anunwanted trip due to thisloss of voltage. This seconda-ry voltage interruption can bedetected by means of the in-tegrated Fuse-failure moni-tor. Immediate blocking of di-stance protection and swit-ching to the backup-emer-gency overcurrent protectionis provided for all types of se-condary voltage failures.

Additional measurement su-pervision functions are

• Balance of voltages and cur-rents

• Broken-conductor super-vision

• Summation of currents andvoltages

• Phase-sequence super-vision

Trip circuit supervision(ANSI 74TC)

One or two binary inputs foreach circuit breaker pole canbe used for monitoring thecircuit-breaker trip coils inclu-ding the connecting cables.An alarm signal is issuedwhenever the circuit is inter-rupted.

Lockout (ANSI 86)

A given tripping commandcan be held until it is resetvia a binary input. Therebythe circuit breaker can belocked to prevent restartinguntil the cause of the distur-bance is clarified. The lock-out state can be removed byconscious manual resetting.A prerequisite is that theclose coil — as usual — atthe circuit breaker is lockedwith pending tripping com-mand.


Functions

16 Siemens SIP 4.2 · 08/99

Region-specific defaultsettings

The SIPROTEC 4 relays7SA522 can be supplied inregional versions. The userpurchases only the functionsrequired. The available functi-ons are matched to the tech-nical requirements of the re-gions (see table).

Function Region World Region US Region GE

Frequency

50 Hz/60 Hz

preset to 50 Hz preset to 60 Hz preset to 50 Hz

Line lengthkm/miles

preset to km preset to miles preset to km

Inverse-time characteristicfor backup overcurrent

IEC, ANSI1)

preset to IEC

ANSI1) IEC

Inverse-time characteristicfor ground (earth) overcur-rent

IEC, ANSI1),Logarithmic inverse

preset to IEC

ANSI1) IEC

STUB-Bus overcurrent stage –

Operational measured values are clearlyarranged on the LCD display

Some fault indications are displayedautomtically on the LCD display

Measured values

The RMS values arecalculated from the acquiredcurrent and voltage signalsalong with the power factor,the frequency, the real andreactive power. Measuredvalues are displayed as pri-mary or secondary values orin percent of the specific linenominal current and voltage.The following values areavailable for measured valueprocessing:

• Currents 3x Iphase, 3I0 , IG,3I0par

• Voltages 3x Vphase-ground, 3xVphase-phase, 3V0, Ven, Vsync

• Symmetrical componentsI1, I2, V1, V2

• Real power P (Watt),Reactive power Q (Var),Apparent power S (VA)

• Power factor PF (= cosϕ)• Frequency f• Load (in service) impedan-

ces, primary and secondary3x (Rphase-ground, Xphase-ground),3x (Rphase-phase, Xphase-phase)

• Limit-value monitoringLimit values are monitoredby means of the CFC. Com-mands can be derived fromthis limit value indication.

Commissioning and testfunctions

Special attention has beenpaid to commissioning. All bi-nary inputs and outputs canbe displayed and set directly.This can simplify the wiringcheck process significantlyfor the user.

The measured values can bedisplayed via DIGSI 4 on thePC screen as primary, secon-dary and/or percentage valu-es simultaneously. This pro-vides a complete overview ofthe actual system conditions.

• The 7SA522 provides a cir-cuit breaker test function.Single- and three pole tripp-ing commands can be gene-rated manually followed bya reclosing command. Thepole open time can be setseparately to the auto reclo-sing dead time.

4 predefined settinggroups

The settings of the 7SA522relay can be adapted quicklyto suit changing networkconfigurations. The relayincludes 4 setting groupswhich can be predefinedduring commissioning oreven changed by remote viaa DIGSI 4 modem link. Thesetting groups can beactivated via binary inputs,via DIGSI 4 (local or remote),via the integrated keypad orvia the serial substationcontrol interface.

1) Disc-emulation with inverse time characteristic is generally combined with ANSI curves

Siemens SIP 4.2 · 08/99 17

Chatter disable

The chatter disable featureevaluates whether the num-ber of status changes of anindication input exceeds aspecified figure in a configu-red period of time. If so, theindication input is blocked fora certain period, so that theevent list will not record ex-cessive operations.

Filter time

All binary control indicationscan be subjected to a filtertime (indication delay) toprevent spurious operation.

Indication filtering anddelay

Indications can be filtered ordelayed. Filtering serves tosuppress brief changes atthe indication input. The indi-cation is passed on only ifthe indication voltage is stillpresent after a set period oftime. In the case of indicationdelay, there is a delay for apreset time. The informationis passed on only if the indi-cation voltage is still presentafter this time.

Indication derivation

A further indication (or acommand) can be derivedfrom an existing indication.Group indications can also beformed. The volume of infor-mation to the system inter-face can thus be reduced andrestricted to the most impor-tant signals.

Data transmission lockout

A data transmission lockoutcan be activated, so as toprevent transfer of informa-tion to the control centerduring work on a circuit bay.

Test mode

During commissioning a testmode can be selected; allindications then have a testmode suffix for transmissionto the control system.

Control

In addition to the protectionfunctions, the SIPROTEC 4units also support all controland monitoring functions re-quired for operating medium-voltage or high-voltage sub-stations. The main applica-tion is reliable control ofswitching and other proces-ses. The status of primaryequipment or auxiliary de-vices can be obtained fromauxiliary contacts and com-municated to the 7SA522 viabinary inputs. Therefore it ispossible to detect and indi-cate both the OPEN andCLOSED position or a faultyor intermediate circuit-brea-ker or auxiliary contact posi-tion. The switchgear or cir-cuit-breaker can be controlledvia:

− integrated operator panel

− binary inputs

− substation control system

− DIGSI 4.

Automation

With the integrated logic, theuser can set specific func-tions for the automation ofthe switchgear or substationby means of a graphic inter-face (CFC). Functions are ac-tivated by means of functionkeys, binary inputs or via thecommunication interface.

Switching authority

The following hierarchy ofswitching authority is appli-cable: ”LOCAL”, DIGSI 4 PCprogram, ”REMOTE”. Theswitching authority is deter-mined according to parame-ters or by DIGSI 4. If the”LOCAL” mode is selected,only local switching opera-tions are possible. Everyswitching operation andchange of breaker position isstored in the status indicationmemory. The switch

command source, switchingdevice, cause (i.e. spontane-ous change or command)and result of a switchingoperation are retained.

Command processing

The 7SA522 offers all func-tions required for commandprocessing, including theprocessing of single anddouble commands with orwithout feedback as well assophisticated monitoring ofthe control hardware andsoftware. Control actionsusing functions such as run-time monitoring and auto-matic command terminationafter output check of the ex-ternal process are also pro-vided by 7SA522. Typicalapplications are:

• Single and double com-mands using 1, 1 plus 1common or 2 trip contacts

• User-definable bay inter-locks

• Operating sequences com-bining several switchingoperations such as controlof circuit-breakers, isolators(disconnector switches) andearthing switches

• Derived triggering of switch-ing operations, indicationsor alarms by logical combi-nation of existing informa-tion.

Assignment of commandfeedback

The positions of the circuit-breaker or switching devicesare captured by feedback.These indication inputs arelogically assigned to the cor-responding command out-puts. The unit can thereforedistinguish whether the in-dication changes as a conse-quence of switching opera-tion or due to a spontaneouschange of state (intermediateposition).

Control and automatic functions

Figure 25


18 Siemens SIP 4.2 · 08/99

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

R15

R16

R17

R18

R13

R14

I4

V4

Flush mounting

52Circuitbreaker

VN

Line

A (L1)

B (L2)

C (L3)

Busbar

IN

IA(L1)

IB(L2)

IC(L3)

VA(L1)

VB(L2)

VC(L3)

Typical connection ofcurrent and voltagetransformers

The typical AC connection has3 phase current transformersand 3 phase-ground (earth)voltage transformers. Theneutral (residual) current (IN =3I0) is measured via the I4-current transformer as thesum of the three phase cur-rents.The zero sequence voltage3V0 is not measured exter-nally but calculated by themicroprocessor.

Typical connections

Voltage transformer con-nections: Separate opendelta transformer

The three phase-to-ground(earth) voltage transformersare typically connected as il-lustrated. The V4 voltagetransformer measures thezero sequence voltage 3V0(Ven) via a separate VT (opendelta connection). This ensu-res an additional voltage su-pervision.The V4 transformer can alsobe connected to a separatevoltage transformer for freeassignable voltage measure-ment (Vx).

Figure 27

Figure 26

R15

R16

R17

R18

R13

R14

VA(L1)

VB(L2)

VC(L3)

V4

52Circuit

breaker

Line

A (L1)

B (L2)

C (L3)

Busbar

Siemens SIP 4.2 · 08/99 19

VT connection to thebusbar

The three phase-to-ground(earth) voltage transformersare connected typically. TheV4 voltage transformer is con-nected to a busbar VT for syn-chronism check and/or volta-ge-supervised automatic re-closing. Any phase-to-phaseor phase-to-ground (earth) vol-tage can be used for busbarvoltage sensing.

Typical connections

Mutual parallel linecompensation

The three-phase current trans-formers are typically connec-ted as illustrated. The I4-CT isconnected to the neutral (resi-dual) current of the parallelline for mutual parallel linecompensation.

Figure 29

Figure 28

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

IA(L1)

IB(L2)

IC(L3)

A (L1)

B (L2)

C (L3)

52Circuitbreaker

Line

Busbar

52Circuitbreaker

Parallel line

I4

R15

R16

R17

R18

R13

R14

52Circuitbreaker

Line

Busbar

VA(L1)

VB(L2)

VC(L3)

A (L1)

B (L2)

C (L3)

V4


20 Siemens SIP 4.2 · 08/99

Additional polarizing fordirectional ground- (earth)fault protection

The three-phase current trans-formers are typically connec-ted as illustrated. The I4-CT isconnected as polarizing cur-rent to a grounded (earthed)power transformer. Thisensures dual polarization forthe directional ground- (earth)fault protection(ANSI 67N).

Typical connections

Separate neutral (residual)current measurement

The three-phase current trans-formers are connected typi-cally. The starpoint points inline direction. The I4-CT isconnected to a separate neu-tral (residual) current CT, thuspermitting a high sensitive 3I0measurement for high resi-stance ground (earth) faults.

Note: Terminal Q7 must beconnected to that CT terminalpointing in the same directionas the starpoint of the phasecurrent CTs.

Figure 31

Figure 30

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8 I4

52Circuitbreaker

Busbar

Flux balancing or

other neutral CT

IA(L1)

IB(L2)

IC(L3)

A (L1)

B (L2)

C (L3)

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

A (L1)

B (L2)

C (L3)

IA(L1)

IB(L2)

IC(L3)

I4

52Circuitbreaker

Busbar

Siemens SIP 4.2 · 08/99 21

Technical Device Data

Rated frequency 50Hz or 60Hz (selectable)

Rated current Inom 1 A or 5 A (selectable)

Rated voltage 80 V to 125 V (selectable)

Power consumptionin CT circuits with Inom = 1A approx. 0.05 VAin CT circuits with Inom = 5A approx. 0.30 VAin the CT circuit for high sensitive ground (earth)fault protection (refer to ordering code) at 1A approx. 0.05 VAin VT circuits approx. 0.1VA

Thermal overload capabilityin CT circuits 100 x INom for 1 s

30 x INom for 10 s4 x INom continuous

in the CT circuit for high sensitive ground (earth) 300 A for 1 sfault protection (refer to ordering code) 100 A for 10 s

15 A continuous

in VT circuits 230 V continuous per phase

Dynamic overload capabilityin CT circuits 250 x INom (one half cycle)in the CT circuit for high sensitive earth faultprotection (refer to ordering code)

Rated auxiliary voltage 24 V to 48 V DC60 V to 125 V DC110 V to 250 V DCand 115 V AC with 50 Hz / 60 Hz

Permitted tolerance of the rated auxiliary voltage -20% to +20%

Max. superimposed AC voltage (peak to peak) ≤ 15%

Power consumptionduring normal operation approx. 8 Wduring pickup with all inputs and outputs activated approx. 18 W

Bridging time during auxiliary voltage failureVaux ≥ 110 V ≥ 50 ms

Quantity 8 or 16 or 24 (refer to ordering code)Function can be assigned

Minimum operating voltage 17 V or 73 V or 154 V DC, bipolarRange is selectable with jumpers for each (3 operating ranges)binary input

Maximum operating voltage 300 V DC

Current consumption, energized approx. 1.8 mA

Quantity 8 or 16 or 24 (refer to ordering code)Function can be assigned

Switching capacitymake 1000 W / VAbreak 30 VAbreak (for resistive load) 40 Wbreak (for τ = L/R ≤ 50 ms) 25 VA

Switching voltage 250 V

Permissible current 30 A for 0.5 s5 A continuous

Quantity

RUN (green) 1ERROR (red) 1Indication (red), function can be assigned 14

Analog input circuits

Power Supply

Output contacts

Binary Inputs

LED displays


22 Siemens SIP 4.2 · 08/99

Housing 7XP20

Dimension 1/2 x 19’‘ or 1/1 x 19’‘refer to ordering code and see dimension drawings

Degree of protection to EN 60 529For the front of the housing IP 51For the rear of the housing

flush mounting version IP 50surface mounting version IP 51

For the terminals IP 2x with terminal cover put on

WeightFlush mounting

1/2 x 19‘’ 6 kg1/1 x 19’‘ 10 kg

Surface mounting1/2 x 19‘’ 11 kg1/1 x 19’‘ 19 kg

Operating interface 1 for DIGSI 4

Connection non isolated, RS 232,front panel, 9-pin subminiature connector

Baud rate 4800 Baud to 115200 Baud

Time synchronization with IRIG-B signal / DCF77 / SCADA or binary inputimpulse

Connection 9-pin subminiature connector

Voltage levels 5 V or 12 V or 24 V

Service interface (refer to ordering code) for DIGSI 4 / Modem / Service(Operating interface 2) Isolated RS232/RS485 9-pin subminiature connector

Dielectric test 500 V/ 50 HzDistance for RS232 max. 15 mDistance for RS485 max. 1000 m

Fiber-optic integrated ST-connectorOptical wavelength λ = 820 nmPermissible attenuation max. 8dB for glass-fiber 62.5/125µmDistance max. 1.5 km

System interface (refer to ordering code) IEC60870-5-103

Profibus FMS (*)Profibus DP (*)

Modbus RTU (*)DNP 3.0 (*)

Isolated RS232/RS485 9-pin subminiature connectorBaud rate 4800 Baud to 38400 BaudDielectric test 500 V / 50 HZDistance for RS232 max. 15 mDistance for RS485 max. 1000m

Profibus RS485Dielectric test 500 V / 50 HzBaud rate max. 12 MBaudDistance 1000 m at 93.75 kBaud; 100 m at 12MBaud

Fiber-optic integrated ST-connectorsingle or double ring

Baud rate max. 1.5 MbaudOptical wavelength λ = 820nmPermissible attenuation max. 8dB for glass-fiber 62.5/125µmDistance max. 1.5 km

Remote Relay interfaces Quantity max. 2 (**)

Mechanical construction

Serial interface / front of unit


Serial interfaces / rear of unit

*) available with next firmware release**) in preparation

Siemens SIP 4.2 · 08/99 23

Standards IEC 60255 (product standards)

ANSI/IEEE C37.90.0/.1/.2

UL 508

For further regulations see “Individual functions”

Insulating tests

Standards IEC 60255-5

Voltage test (100% test)

All circuits except for auxiliary supply, binary inputs 2,5 kV (rms.), 50Hz / 60 Hzand communication interfaces

Auxiliary voltage and binary inputs (100% test) 3,5 kV DC

RS485/RS232 rear side communication interfacesand time synchronization interface (100% test) 500 V (rms.), 50 Hz / 60 Hz

Surge voltage test (type test)All circuits except for communication interfaces 5 kV (peak); 1.2/50 µs; 0.5 Jand time synchronization interface, class III 3 positive and 3 negative surges at intervals of 5 s

EMC tests for noise immunity

Standards IEC 60255-6, 60255-22 (Product standards)EN 50082-2 (Basic specification)

(Type tests) DIN 57 435 part 303

High frequency test 2.5 kV (peak); 1 MHz; τ = 15 ms; 400 surges per s;IEC 60255-22-1, class III and DIN 57 435 test duration 2 spart 303, class III

Discharge of static electricity 8 kV contact discharge; 15 kV air discharge; bothIEC 60255-22-2 class IV polarities; 150 pF; R j = 330 ΩEN 61000-4-2, class IV

Exposure to RF field, non modulated 10 V/m; 27 MHz to 500 MHzIEC 60255-22-3 (report) class III

Exposure to RF field, amplitude-modulated 10 V/m; 80 MHz to 1000 MHz; 80% AM; 1 kHzIEC 61000-4-3, class III

Exposure to RF field, pulse-modulated 10 V/m; 900 Mhz; repetition frequency 200 Hz;IEC 61000-4-3/ ENV 50204, class III duty cycle 50 %

Fast transients, Bursts 4 kV; 5/50 ns; 5 kHz; burst length = 15 ms;IEC 60255-22-4 and repetition frequency 300 ms; both polarities;IEC 61000-4-4, class IV Rj = 50 Ω; test duration 1 min

High-energy surge voltages (SURGE),IEC 61000-4-5 installation class IIIAuxiliary supply common (longitudinal) mode: 2kV; 12Ω, 9µF

differential(transversal) mode: 1kV; 2Ω, 18µF

Measurements inputs, binary inputs, binary outputs common (longitude) mode: 2kV; 42Ω,0.5µFdifferential(transversal) mode: 1kV; 42Ω, 0.5µF

Conducted RF, amplitude-modulated 10 V; 150 kHz to 80 Mhz; 80 % AM; 1kHzIEC 61000-4-6, class III

Magnetic field with power frequency 30 A/m continuous;IEC 61000-4-8, class IV 300 A/m for 3 s; 50 HzIEC 60255-6 0.5 mT; 50 Hz

Oscillatory Surge Withstand Capability 2,5 to 3 kV (peak); 1 to 1,5 MhzANSI/IEEE C37.90.1 damped wave; 50 surges per second;

Duration 2 s; Ri = 150Ω to 200ΩFast Transient Surge Withstand Capability 4 kV to 5 kV; 10/150 ns; 50 impulses per second;

ANSI/IEEE C37.90.1 both polarities; Duration 2 s ; Rj = 80 ΩRadiated Electromagnetic Interference 35 V/m; 25 MHz to 1000 Mhz

IEEE C37.90.2

Damped oscillations 2.5 kV (peak value), polarity alternating 100 kHz,IEC 60894, IEC 61000-4-12 1 Mhz, 10 Mhz and 50 Mhz, Rj = 200Ω

EMC tests for interference emission

(Type test)

Standard EN 50081-1 (Basic specification)

Radio interference voltage on lines, 150kHz to 30 Mhzonly auxiliary supply class BIEC-CISPR 22

Interference field strenght 30 Mhz to 1000 MHZIEC-CISPR 22 class B


Electrical tests


24 Siemens SIP 4.2 · 08/99

Vibration, shock stress and vibrationduring earthquake

Standards IEC 60255-21 and IEC 60068-2

Vibration sinusoidalIEC 60255-21-1, class 2 10 Hz to 60 Hz: ±0.075 mm amplitude;IEC 60068-2-6 60 Hz to 150 Hz: 1 g acceleration

frequency sweep 1 octave/min20 cycles in 3 othogonal axes

Shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 5 g, duration 11 ms, 3 shocks each inIEC 60068-2-27 both directions of the 3 axes

Vibration during earthquake sinusoidalIEC 60255-21-2, class 1 1 Hz to 8 Hz:±3,5 mm amplitude (horizontal axis)IEC 60068-3-3 1 Hz to 8 Hz:±1.5 mm amplitude (vertical axis)

8 Hz to 35 Hz: 1g acceleration (horizontal axis)8 Hz to 35 Hz: 0.5 g acceleration (vertical axis)frequency sweep 1 octave/min1 cycle in 3 orthogonal axes

Vibration and shock stressduring transport

Standards IEC 60255-21 and IEC 60068-2

Vibration sinusoidalIEC 60255-21-1, class 2 5 Hz to 8 Hz:±7.5 mm amplitude;IEC 60255-2-6 8 Hz to 150 Hz: 2 g acceleration

frequency sweep 1 octave/min20 cycles in 3 orthogonal axes

Shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 15 g, duration 11 ms, 3 shocks eachIEC 60068-2-27 in both directions of the 3 axes

Repetitive shock half-sinusoidalIEC 60255-21-2, class 1 acceleration 10 g, duration 16 ms, 1000 shocksIEC 60068-2-29 each in both directions of the 3 axes

Temperatures

Temperature during service -5°C to +55°C

Temporary permissible temperature limit during service -20°C to +70 °C(The legibility of the display may be affectedabove 55°C)

Temperature limit during storage -25°C to +55°C

Temperature limit during transport -25°C to +70°C(Storage and transport with standard factory packaging)

Humidity

Permissible humidity stress yearly average ≤ 75% relative humidity; on 56 daysin the year up to 93% relative humidity; moisturecondensation during operation is not permitted

This product is in conformity with the directive of the Conformity is proved by tests that had beenCouncil of the European Communities on the performed according to Article 10 of theapproximation of the laws of the member states Council Directive in accordance with therelating to electromagnetic compatibility generic standards EN 50081 and EN 50082(EMC Council Directive 89/336/EEC) and concerning (for EMC directive) and the standards EN 60255-6electrical equipment for application within specified (for low-voltage directive) by Siemens AG.voltage limits (low-voltage directive 73/23 EEC).

The device is designed in accordance with theinternational standards of IEC 60255.

Further applicable standards:ANSI/IEEE C37.90.0 and C37.90.1

Mechanical dynamic tests

Climatic stress tests

CE conformity


Siemens SIP 4.2 · 08/99 25

Distance zones 6, 1 as extended (overreach) zoneall zones may be set forward or/and reverseor ineffective

Time stages 6 for multi-phase faults3 for single-phase faults

Characteristic (refer to ordering code)selectable seperately for phase and quadrilateral and/orground (earth) faults MHO

Time range 0.00 to 30 s (step 0.01s) or deactivated

Line angle ϕL 30° to 89° (step 1°)Quadrilateral reactance reach X 0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)

(step 0.01Ω)Quadrilateral resistance reach R

for phase-to-phase faults and 0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)

phase-to-ground (earth) faults (step 0.01Ω)

MHO impedance reach ZR 0.05Ω to 200Ω (1A) / 0.01Ω to 40Ω (5A)

(step 0.01Ω)

Minimum phase current I 0.10A to 4A (1A) / 0.50A to 20A (5A)

(step 0.01A)

Ground- (Earth-) fault pickupNeutral (residual) current 3 I0 0.05A to 4A (1A) / 0.25A to 20A (5A)

(step 0.01A)

Zero sequence voltage 3V0 1 to 100V (step 1V) or deactivated

Zero sequence compensationselectable input formats RG/RL and XG/XL

k0 and ϕ (k0)

Seperately selectable for zones Z1higher zones

RG/RL and XG/XL - 0.33 to 7 (step 0.01)

k0 0 to 4 (step 0.001)ϕ (k0 ) -135° to 135°Parallel line mutual compensation (refer to ordering code)RM/RL and XM/XL 0.00 to 8 (step 0.01)

Load encroachmentMinimum load resistance 0.10Ω to 250Ω (1A) / 0.02Ω to 50Ω (5A)

(step 0.01Ω) or deactivatedMaximum load angle 20° to 60° (step 1°)Directional decision for all types of faults with sound phase polarization and/or voltage

memory

Directional sensitivity dynamically unlimited

Tolerances for sinusodial quantities

∆X

X≤ 5% for 30° ≤ ϕ scc ≤ 90°

∆R

R≤ 5% for 0° ≤ ϕ scc ≤ 60°

∆Z

Z≤ 5% for -30° ≤ (ϕ scc − ϕ line) ≤+30°

Timer tolerance ± 1% of set value or 10ms

Operating times

Minimum trip time approx. 17ms at 50Hzapprox. 15ms at 60Hz

Reset time approx. 30ms

Output of the distance to fault X, R (secondary) in ΩX, R (primary) in Ωdistance in kilometers or milesdistance in % of line length

Start of calculation with trip, with pickup reset

Reactance per unit length 0.005 to 6.5Ω / km (1A) / 0.001 to 1.3Ω / km (5A) or0.005 to 10Ω / mile (1A) / 0.001 to 2Ω / mile (5A)

(step 0.001Ω / unit)

Tolerance for sinusodial quantities≤ 2.5% line length for 30° ≤ϕ scc ≤ 90° andVscc/VN > 0.10

Distance protection – ANSI 21, 21N

Technical Function Data

Fault locator


26 Siemens SIP 4.2 · 08/99

Power swing detection principle measurement of the rate of impedance vectorchange and scanning of the vector course

Max. detectable power swing frequency approx. 7 Hz

Operating modes power swing blocking and/orpower swing tripping (out of step tripping)

Power swing blocking programs all zones blockedZ1/Z1B blockedZ2 to Z5 blockedZ1, Z1B, Z2 blocked

Detection of faults during power swing blocking stop power swing blocking for all types of faults

Operating modes POTTPUTT, DUTTdirectional comparison Blockingdirectional comparison Unblockingdirectional comparison hybrid (POTT and echowith Weak Infeed protection)

Transient blocking logic for overreaching schemes(current reversal guard)

Send and receive signals suitable for 2- and 3- terminal linesphase segregated signals for selective single phasetripping selectable

Trip time delay 0.00 to 30s (step 0.01s) or deactivated

Timer tolerance ± 1% of set value or 10ms

Characteristic 3 definite time stages / 1 inverse time stage or4 definite time stages

Inrush restraint Selectable for every stage

Instantaneous trip after switch-onto-fault Selectable for every stage

Influence of harmonics

Stages 1 and 2 3rd and higher harmonics are completelysuppressed by digital filtering

Stages 3 and 4 2nd and higher harmonics are completelysuppressed by digital filtering

Definite time ground (earth) Pickup definite time stage 1, 3I0 0.5A to 25A (1A) / 2.5A to 125A (5A)

overcurrent protection (step 0.01A)

ANSI 50N Pickup definite time stage 2, 3I0 0.2A to 25A (1A) / 1A to 125A (5A)

(step 0.01A)

Pickup definite time stage 3, 3I0 0.05A to 25A (1A) / 0.25A to 125A (5A)(step 0.01A)with normal neutral (residual) current CT(refer to ordering code)

0.003A to 25A (1A) / 0.015A to 125A (5A)(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)

Pickup definite time stage 4, 3I0 0.05A to 4A (1A) / 0.25A to 20A (5A)(step 0.01A)with normal neutral (residual) current CT(refer to ordering code)

0.003A to 4A (1A) / 0.015A to 20A (5A)(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)

Time delay for definite time stages 0.00 to 30s (step 0.01s) or deactivated

TolerancesCurrent starting ≤ 3% of set value or 1% of Inom

Delay times ± 1% of set value or 10ms

Pickup timesDefinite time stages 1 and 2 approx. 30msDefinite time stages 3 and 4 approx. 40ms

Pilot- (Tele-) protection for distance protection – ANSI 85-21

Ground- (Earth-) fault overcurrent protection – ANSI 50N, 51N, 67N


Power swing detection – ANSI 68, 68T

Direct transfer trip

Siemens SIP 4.2 · 08/99 27

Inverse time ground (earth) Current starting 3I0 0.05A to 4A (1A) / 0.25A to 20A (5A)

overcurrent protection (step 0.01A)ANSI 51N with normal neutral (residual) current CT

(refer to ordering code)

0.003A to 4A (1A) / 0.015A to 20A (5A)

(step 0.01A)with high sensitive neutral (residual) current CT(refer to ordering code)

Tripping time characteristics Characteristics normal inverseaccording to IEC 60255-3 very inverse

extremely inverselong time inverse

Time multiplier Tp = 0.05 to 3s (step 0.01s) or deactivated

Pickup threshold approx. 1.1 x I/IpReset threshold approx. 1.05 x I/Ip

Tolerances

Operating time for 2 ≤ I/Ip ≤ 20 ≤ 5% of setpoint ± 15ms

Tripping time characteristics Characteristics inverseaccording to ANSI/IEEE short inverse

long inversemoderately inversevery inverseextremely inversedefinite inverse

Time dial 0.50 to 15 (step 0.01) or deactivated

Pickup threshold approx. 1.1 x M

Reset threshold approx. 1.05 x M

TolerancesOperating time for 2 ≤ Μ ≤ 20 ≤ 5% of setpoint ± 15ms

Tripping time according toLogarithmic inverse characteristic

Characteristic t[s] = T3I0p max - T3I0p ⋅ ln 3

3

0

0

I

I p

Pickup threshold 1.1 to 4.0 x I/Ip (step 0.1)

Directional decision Polarizing quantities for directional decision 3 I0 and 3V0 orANSI 67N 3 I0 and 3V0 and Ig (grounded power transformer) or

3 I2 and 3V2 (negative sequece)

Zero sequence voltage 3V0 0.5 to 10V (step 0.1V)

Ground current Ig of grounded power transformer 0.05A to 1A (1A) / 0.25A to 5A (5A) (step 0.01A)

Negative sequence voltage 3V2 0.5 to 10V (step 0.1V)

Negative sequence current 3I2 0.05A to 1A (1A) / 0.25A to 5A (5A) (step 0.01A)

Inrush restraint 2ndharmonic ratio 10 to 45% of fundamental (step 1%)

Maximum current, overriding inrush restraint 0.5A to 25A (1A) / 2.5A to 125A (5A) (step 0.01A)



28 Siemens SIP 4.2 · 08/99

Operating modes directional comparison Pickupdirectional comparison Blockingdirectional comparison Unblocking

Transient blocking logic for schemes with parallel lines

Send and receive signals suitable for 2- and 3- terminal lines

Operating modes with carrier (signal) reception echoecho and trip with undervoltage

Undervoltage phase-ground (-earth) 2V to 70V (step 1V)

Time delay 0.00s to 30s (step 0.01s)

Echo impulse 0.00s to 30s (step 0.01s)

Tolerances

Voltage threshold ≤ 5% of set value or 0.5V

Timer ± 1% of set value or 10ms

Operating modes active only with loss of VT secondary circuitalways active

Characteristic 2 definite time stages / 1 inverse time stage

Instantaneous trip after switch-onto-fault selectable for every stage

Definite time overcurrent Pickup definite time stage 1, phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)

protection (step 0.01A)

ANSI 50, 50N Pickup definite time stage 1, neutral (residual) 0.05A to 25A (1A) / 0.25A to 125A (5A)current (step 0.01A)

Pickup definite time stage 2, phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)

(step 0.01A)

Pickup definite time stage 2, neutral (residual) 0.05A to 25A (1A) / 0.25A to 125A (5A)

current (step 0.01A)

Time delay for definite time stages 0.00 to 30s (step 0.01s) or deactivated

Tolerances

Current starting ≤ 3% of set value or 1% of Inom


Operating time approx. 25ms

Inverse time overcurrent Phase current starting 0.1A to 4A (1A) / 0.5A to 20A (5A)

protection (step 0.01A)

ANSI 51, 51N Neutral (residual) current starting 0.05A to 4A (1A) / 0.5A to 20A (5A)

(step 0.01A)

Tripping time characteristics Characteristics normal inverseaccording to IEC 60255-3 very inverse

extremely inverselong time inverse

Time multiplier Tp = 0.05 to 3s (step 0.01s) or deactivated

Pickup threshold approx. 1.1 x I/Ip

Reset threshold approx. 1.05 x I/IpTolerances

Operating time for 2 ≤ I/Ip ≤20 ≤ 5% of setpoint ±15ms


Pilot-(Tele-) protection for directional ground-(earth-) fault overcurrent protection – ANSI 85-67N

Weak Infeed protection with undervoltage – ANSI 27WI

Backup overcurrent protection – ANSI 50(N), 51(N)

Siemens SIP 4.2 · 08/99 29

Tripping time characteristics Characteristics inverseaccording to ANSI/IEEE short inverse

long inversemoderately inversevery inverseextremely inversedefinite inverse

Time dial 0.50 to 15 (step 0.01) or deactivated

Pickup threshold approx. 1.1 x M

Reset threshold approx. 1.05 x M

Tolerances

Operating time for 2 ≤ M ≤ 20 ≤ 5% of setpoint ±15ms

Operating modes active only with open isolator position(signalled via binary input)

Characteristic 1 definite time stage

Instantaneous trip after switch-onto-fault selectable

Pickup phase current 0.1A to 25A (1A) / 0.5A to 125A (5A)

(step 0.01A)

Pickup neutral (residual) current 0.05A to 25A (1A) / 0.25 to 125A (5A)

(step 0.01A)

Time delay, separate for phase and 0.00 to 30s (step 0.01s) or deactivatedground (earth) stage

Reset ratio approx. 0.95

Tolerances



Operating mode active only after CB closing; instantaneoustrip after pickup

Pickup current 1A to 25A (1A) / 5A to 125A (5A)

(step 0.01A)

Reset ratio approx. 0.95

Tolerances


Operating time approx. 13ms

Measured quantities 3 phase-ground (-earth) voltages andzero sequence voltage 3V0

(zero sequence voltage can be measured viaseparate VT or can be calculated internally)

Operating modes local trip and/orcarrier trip impulse for remote end trip

Pickup phase-ground (-earth) voltage 1V to 170V (step 0.1V)

Pickup zero sequence voltage 3V0 1V to 300V (step 0.1V)

Trip time delay, separate for phase-ground 0.00 to 30s (step 0.01s) or deactivated(-earth) and zero sequence voltage

Carrier send impulse 0.05s to 0.5s (step 0.01s)

Reset ratio 0.95

Tolerances

Pickup ≤ 3% of set value or 1V

Timers ± 1% of set value or 10ms

Operating time

phase-ground (earth) voltage approx. 30mszero sequence voltage approx. 65ms

STUB bus overcurrent protection – ANSI 50(N)-STUB

Instantaneous high speed switch-onto-fault overcurrent protection – ANSI 50HS

Overvoltage protection – ANSI 59



30 Siemens SIP 4.2 · 08/99


Number of stages 2

Current start 0.1A to 4A (1A) / 0.5A to 20A (5A) (step 0.01A)

Delay time 0.05 to 1s (step 0.01s)

Shortest release time approx. 10ms

Timer tolerance ± 1% of setting value or 10ms

Number of automatic reclosures up to 8

Program only 1-poleonly 3-pole1 or 3-pole

Voltage check discrimination between successful andnon-successful reclose attempts

Action times 0.01 to 30 s (step 0.01s)

Dead times 0.01 to 1800 s (step 0.01s)

Reclaim times 0.5 to 30 s (step 0.01s)

CLOSE command duration 0.01 to 30 s (step 0.01s)

Timer tolerance ± 1% of setting value or 10ms

Operating modes

Line dead / busbar dead V1< / V2<

Line dead / busbar live V1< / V2>

Line live / busbar dead V1> / V2<

Synchronism V1> / V2>

Permissible voltage difference 1 to 50 V (step 1V)

Permissible frequence difference 0.01 to 1 Hz (step 0.01 Hz)

Permissible angle difference 1 to 60° (step 1)

Supervision time 0.01 to 30 s (step 0.01s)

Automatic reclosure – ANSI 79

Synchronism check – ANSI 25

Breaker failure protection – ANSI 50BF

Siemens SIP 4.2 · 08/99 31

Currents primary, secondary and percent3 x Iphase

3 I0, I1, I2, IG, 3I0par

Tolerances10 to 50% Vnom typically ≤1% of 50% Vnom

50 to 200%Vnom typically ≤1% of measured value

Voltages primary, secondary and percent3 x Vphase-ground,3 x Vphase-phase

3V0, V1, V2, VSYNC, Ven

Tolerances10 to 50% Inom typically ≤1% of 50% Inom

50 to 200% Inom typically ≤1% of measured value

Power and direction of power flow primary and percentP, real power in WQ, reactive power in VarS, apparent power in VA

Frequency f

Power factor PF

Load impedances with direction primary and secondary3 x (Rphase-ground, X phase-ground)3 x (Rphase-phase, Xphase-phase)

TolerancesP: typically ≤ 3%for |cos ϕ| = 0.7 to 1 andV/Vnom, I/ Inom = 50 to 120%Q: typically ≤ 3%for |sin ϕ | = 0.7 to 1 andV/Vnom, I/Inom = 50 to 120%S: typically ≤ 2%for V/Vnom,I/Inom = 50 to 120%f: ≤ 20mHzPF: ≤ 3%for |cos ϕ| = 0.7 to 1

Measured analog channels 3 x Iphase, 3I0, 3 I0par3 x Vphase , 3V0, VSYNC, Ven

Binary channels pickup and trip information, other signals can befreely configured

Maximum number of available recordings 8

Sampling interval 20 samples per cycle

Storage time total of 5spre-event and post-event recording time andevent storage time settable

Measurement supervision current summationcurrent balancevoltage summationvoltage phase sequencefuse failure monitor

AnnunciationsEvent logging buffer length 200Fault logging storage of signals of the last 8 faults,

buffer length 200

Switching statistics phase segregated summation of circuitbreaker operationssummated tripping current per phasetripping current of the last trip

Circuit breaker test trip-/close-cycle 3phasetrip-/close-cycle per phase

Setting range

Dead time for CB trip-close-cycle 0.00 to 30s (step 0.01s)

Commissioning aids operational measured valuescircuit breaker testread binary inputsinitiate binary inputsset binary outputsset serial interface outputs

Additional functions

Oscillographic fault recording

Operational measured values



Selection and ordering data

––225A

Position 7 8 9 10 11 12 13 14 15 16

S7

*) available with next firmware release

32 Siemens SIP 4.2 · 08/99

Current transformer 7

Phase = 1A, Ground (Earth) = 1A (min. = 0.05A) 1

Phase = 1A, Ground (Earth) = high sensitive 1A (min. = 0.005A) 1) 2

Phase = 5A, Ground (Earth) = 5A (min. = 0.25A) 5

Phase = 5A, Ground (Earth) = high sensitive 5A (min. = 0.005A) 1) 6

1) Position 7 = 2 or position 7 = 6 is not available with Position 14 = K, M, N, Q

Auxiliary Voltage (Power supply, Binary indication voltage) 8

24V to 48V DC, binary input threshold 17V 2

60V to 125V, binary input threshold 17V 4

110V to 250V DC, 115 V AC, binary input threshold 73V 5

220V to 250V DC, 115V AC, binary input threshold 154V 6

Housing and quantity of binary inputs (BI) and outputs (BO) 9

1/2 x 19’‘, 8 BI, 16 BO, Flush-mounting housing with screw terminals A

1/1 x 19’‘, 16 BI, 24 BO, Flush-mounting housing with screw terminals C

1/1 x 19’‘, 24 BI, 32 BO, Flush-mounting housing with screw terminals D

1/2 x 19’‘, 8 BI, 16 BO, Surface-mounting housing with screw terminals 2) E

1/1 x 19’‘, 16 BI, 24 BO, Surface-mounting housing with screw terminals 2) G

1/1 x 19’‘, 24 BI, 32 BO, Surface-mounting housing with screw terminals 2) H

1/2 x 19’‘, 8 BI, 16 BO, Flush-mounting housing with plug-in terminals J

1/1 x 19’‘, 16 BI, 24 BO, Flush-mounting housing with plug-in terminals L

1/1 x 19’‘, 24 BI, 32 BO, Flush-mounting housing with plug-in terminals M

2) Position 11 = 5 or position 11 = 6 is not available with position 9 = E, G, H

Region and operating language 10

Region GE, language german A

Region World, language UK-english B

Region US, language US-english C

Other languages on request

System interface for substation control (on rear of device) 11

No system interface 0

IEC 60870-5-103, electrical RS232 1

IEC 60870-5-103, electrical RS485 2

IEC 60870-5-103, fiber optical 820 nm, ST-connector 3

PROFIBUS FMS Slave, electrical RS485 (*) 4

PROFIBUS FMS, optical fiber, single ring, ST-connector 2) (*) 5

PROFIBUS FMS, optical fiber, double ring, ST-connector 2) (*) 6

Other protocols on request

2) Position 11 = 5 or position 11 = 6 is not available with position 9 = E, G, H

Service interface (2nd operating interface) for DIGSI / Modem (on rear of device) 12

No 2nd operating interface 0

Electrical RS232 1

Electrical RS485 2

Optical fiber 820nm, ST-connector 3

With remote relay interface (in preparation)

Siemens SIP 4.2 · 08/99 33

Selection and ordering data

Position 13 14 15 16

Trip mode 13

Trip mode 3pole 0

Trip mode 1- and 3pole 4

Distance characteristic (ANSI 21, 21N), Power Swing (ANSI 68)Parallel Line Compensation 14

Quadrilateral without Power Swing without Parallel Line Comp. C

Quadrilateral and/or MHO without Power Swing without Parallel Line Comp. E

Quadrilateral with Power Swing without Parallel Line Comp.. F

Quadrilateral and/or MHO with Power Swing without Parallel Line Comp. H

Quadrilateral without Power Swing with Parallel Line Comp. 1) K

Quadrilateral and/or MHO without Power Swing with Parallel Line Comp. 1) M

Quadrilateral with Power Swing with Parallel Line Comp. 1) N

Quadrilateral and/or MHO with Power Swing with Parallel Line Comp. 1) Q

1) Position 7 = 2 or Position 7 = 6 is not available with Position 14 = K, M, N, Q

Autoreclosure (AR, ANSI 79), Synchrocheck (Sync., ANSI 25)Breaker Failure protection (BF, ANSI 50BF), Overvoltage protection (OV, ANSI 59) 15

Without AR without Sync. without BF without OV A

Without AR without Sync. without BF with OV B

Without AR without Sync. with BF without OV (*) C

Without AR without Sync. with BF with OV (*) D

Without AR with Sync. without BF without OV (*) E

Without AR with Sync. without BF with OV (*) F

Without AR with Sync. with BF without OV (*) G

Without AR with Sync. with BF with OV (*) H

With AR without Sync. without BF without OV (*) J

With AR without Sync. without BF with OV (*) K

With AR without Sync. with BF without OV (*) L

With AR without Sync. with BF with OV (*) M

With AR with Sync. without BF without OV (*) N

With AR with Sync. without BF with OV (*) P

With AR with Sync. with BF without OV (*) Q

With AR with Sync. with BF with OV (*) R

Ground (Earth) Fault Overcurrent protection (ANSI 50N, 51N, 67N) 16

Without 0

With 4

*) available with next firmware release

34 Siemens SIP 4.2 · 08/99


Accesories

Fig. 33

2-pin connectorFig. 34

3-pin connector

Fig. 35

Short circuit link for currentcontacts

Fig. 36

Short circuit link for voltage/signal contacts

Fig. 32

Mounting railfor 19”rack

Description Order No. Size ofpackage

Supplier Fig

Connector 2-pinConnector 3-pin

C73334-A1-C35-1C73334-A1-C36-1

11

SiemensSiemens

3334

Crimp connectorCI2 0.5-1 mm2

Crimp connectorCI2 0.5-1 mm2

Crimp connectorCI2 1-2.5 mm2

Crimp connectorCI2 1-2.5 mm2

Crimp connectorType III+ 0.75-1.5 mm2

Crimp connectorType III+ 0.75-1.5 mm2

827039-1

827396-1

827040-1

827397-1

163083-7

163084-2

4000taped on reel1

4000taped on reel1

4000taped on reel

1

AMP1)

AMP1)

AMP1)

AMP1)

AMP1)

AMP1)

Crimping tool for Typ III+Crimping tool for CI2

0-169422-10-825582-0

11

AMP1)

AMP1)

19”mounting rail C73165-A63-D200-1 Siemens 32

Short-circuiting links- for current terminals- all other terminalsTerminal cover- large- small

(included)C73334-A1-C33-1C73334-A1-C34-1

C73334-A1-C31-1C73334-A1-C32-1

11

11

SiemensSiemens

SiemensSiemens

3536

55

1) AMP Deutschland GmbHAmperesstr. 7-11D-63225 LangenPhone:: +49 6103 709-0Fax +49 6103 709-223

Please check with your localrepresentative for local supplier

Product Description Versions Order Number

DIGSI 4

Software for operation and usageof protection devices of Siemens

MS Windows program, running under MS Win-dows NT 4, MS Windows 95Including device templates, online manual

Professional

Complete version: Basis version and DIGRA 4, DIGSI REMOTE 4,SIMATIC CFC 4, Display Editor 4 and Graphic Tools 4 with licensefor 10 purchase. 1 copper connection cable included

Basis

Complete version with license for 10 PCs, 1 copper connectioncable included

Demo version

Functionality of Basis version without the availability ofcommunication with relays

7XS5402 – 0AA00

7XS5400 – 0AA00

7XS5401 – 0AA00

Copper connection cable between PC and relay(9-pin female to 9-pin male)

7XV5100-4

Two-channel binary signal transducer

The bidirectional transducer registers binaryinformation at two binary inputs and forwardsit via fibre-optic cable to a second transducer,which outputs the signals via contacts.Distances of about 3 km can be realized directlyvia multimode fibre-optic cables. The repeater7XV5451 is available for distances up to 14 kmvia monomode fibre-optic cable. Because of serialtransmission connection can also be made bystandby modem or a digital network via theasynchronous RS232 interface.

Plastic housing, for snap mount on 35 mm DIN EN 50022 rail

Auxiliary voltage supply DC 24 to 250V and AC110 to 220V withalarm relay

2 binary inputs, 2 trips,

1 alarm relay with potential free contactsConnector to a second transducer via fibre optic cable with820nm,

FSMA-plug to connect to the fibre-optic cable 62,5 µm/125 µmConnection to a second transducer via a communication systemwith a RS232 interface, 9-pole. SUB-D socket

7XV5653-0AA00

Instruction Manual 7SA522 V4.00, English C53000-G1176-C119

Instruction Manual 7SA522 V4.00, US English C53000-G1140-C119

7SA522 Advertising sheet English E50001-U321-A133-X-7600

SIPROTEC Overview sheet English E50001-U321-A118-X-7600

f = 60 Hz, SIR < 20

0

5

10

15

20

25

30

35

0 25 50 75 100

Fault location at % of Zone1 setting

Tri

pti

me

(ms)

1 cycle

f = 60 Hz, SIR ≤ 20

The figures 37 and 38 showthe tripping time curves forthe distance protection func-tion. These curves apply tolines with a Source Imped-ance Ratio (SIR) up to 20.The tripping time includesthe output contact closingtime.

The curves are based on aline with conventional VT’s,no pre-fault load and faultswithout fault resistance.

Trip time curves

Figure 37

Distance protection: typical trip time for ground faults at 50 Hz

Figure 38

Distance protection: typical trip time for ground faults at 60 Hz

Siemens SIP 4.2 · 08/99 35

f = 50 Hz, SIR < 20

0

5

10

15

20

25

30

35

0 25 50 75 100

Fault location at % of Zone1 setting

Tri

pti

me

(ms)


36 Siemens SIP 4.2 · 08/99

Connection diagrams according to IEC Standard

Live status contact

NC or NO with Jumper

=

=

(~)

IL1

IL2

IL3

I4

VL1

VL2

VL3

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

SerialInterfaces

K1+

-K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16

R1R2R3R4R5R6R7R8R9R10R11R12BO 15

BO 14

BO 13

Fast BO1

Fast BO2

Fast BO3

Fast BO4

Fast BO5

Fast BO6

Fast BO7

BO8

BO9BO10

BO11

BO12

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12

R15

R16

R17

R18

R13

R14

Flush mounting

Surface mounting

25

50

24

49

23

48

22

47

20

45

19

44

21

46

4318421741

401439

381337123611

886387628661856084598358

749973989772967195709469

90

65

L+(15)

L-(16)

Figure 37

Housing 1/2 x 19’‘, Basic Version 7SA522*-*A, 7SA522*-*E and 7SA522*-*Jwith 8 Binary Inputs and 16 Binary Outputs

Front interface

System/Scadainterface

Service interfaceDIGSI, Modem

Timesynchronization

A

B

C

Figure 38

Serial interfaces

Siemens SIP 4.2 · 08/99 37


Live status contactNC or NO with Jumper

=

=(~)

IL1

IL2

IL3

I4

VL1

VL2

VL3

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

Serial

Interfaces

K1+

-K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16


BO 14

BO 13

P3P4

NC or NOwith Jumper

BO16

P5P6P7P8

BO 17

BO 18

BO 19

BO 20

BO 21

BO 22

BO 23

P9P10P11P12P13P14P15P16

Fast BO1

Fast BO2

Fast BO3

Fast BO4

Fast BO5

Fast BO6

Fast BO7

BO8

BO9BO10BO11

BO12

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12P17P18N1N2N3

N4N5N6

N7N8N9N10N11

BI 9

BI 10

BI 11

BI 12

BI 13

BI 14

BI 15

BI 16N12

R15

R16

R17

R18

R13

R14

Flush mounting

Surface mounting

50

100

49

99

48

9847

97

45

95

44

94

46

96

9040893986

368535

843483338232

173123172122171121170120169119168118

174

124

L+ (37)

L- (38)

7525742473

237222

712170206919

190140189139188

138

187137186136185135184134

149199148198197147196146195145194144

Figure 39

Housing 1/1 x 19’‘, Medium Version 7SA522*-*C, 7SA522*-*G and 7SA522*-*Lwith 16 Binary Inputs and 24 Binary Outputs

Note: for serial interfaces see Figure 38

38 Siemens SIP 4.2 · 08/99




=

=(~)

IL1

IL2

IL3

I4

VL1

VL2

VL3

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

Serial

Interfaces

K1+

-K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16


BO 14

BO 13

P3P4

NC or NOwith Jumper

BO16

P5P6P7P8

BO 17

BO 18

BO 19

BO 20

BO 21

BO 22

BO 23

P9P10P11P12P13P14P15P16H3H4

NC or NOwith Jumper

BO24

H5H6H7H8

BO 25

BO 26BO 27

BO 28

BO 29

BO 30

BO 31

H9H10H11H12H13H14H15H16

Fast BO1

Fast BO2

Fast BO3

Fast BO4

Fast BO5

Fast BO6

Fast BO7

BO8

BO9BO10BO11

BO12

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12P17P18N1N2N3

N4N5N6

N7N8N9N10N11

BI 9

BI 10

BI 11

BI 12

BI 13

BI 14

BI 15

BI 16N12H17H18G1G2G3

G4G5G6

G7G8G9G10G11

BI 17

BI 18

BI 19

BI 20

BI 21

BI 22

BI 23

BI 24G12

R15

R16

R17

R18

R13

R14

Flush mounting

Surface mounting

50

100

49

99

48

9847

97

45

95

44

94

46

96

7525742473

237222

7121702069199040893986

368535

8434833382326818671766

166515

641463136212

173123

122171121170120169119168118

149199148198197147196146195145194144

190140189139188138

172

187137186136185135184134166116165115164114

163113162112161111160110

174

124

L+ (37)

L- (38)

Figure 40

Housing 1/1 x 19’‘, Maximum Version 7SA522*-*D, 7SA522*-*H and 7SA522*-*M with24 Binary Inputs and 32 Binary Outputs


Siemens SIP 4.2 · 08/99 39

Connection diagrams according to ANSI Standard

Figure 41

Housing ½ x 19’‘, Basic Version 7SA522*-*A, 7SA522*-*E and 7SA522*-*J with8 Binary Inputs and 16 Binary Outputs

Figure 42

Serial interfaces

=

=

(~)

IA

IB

IC

I4

VA

VB

VC

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

R15

R16

R17

R18

R13

R14

SerialInterfaces

K1+

-K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16

R1R2R3R4

R5R6R7R8R9R10R11R12BO 15

BO 14

BO 13

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12

Fast BO4

Fast BO5

Fast BO6

Fast BO7


Fast BO1

Fast BO2

Fast BO3

BO8

BO9BO10BO11

BO12

Flush mounting

Surface mounting

25

50

24

49

23

48

22

47

20

45

19

44

21

46

4318421741

401439

381337123611

886387628661856084598358

74997398

9772967195709469

90

65

L+(15)

L-(16)

Front interface

System/Scadainterface

Service interfaceDIGSI, Modem

Timesynchronization

A

B

C


40 Siemens SIP 4.2 · 08/99


=

=(~)

IA

IB

IC

I4

VA

VB

VC

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

Serial

Interfaces

K1+

- K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16

R1R2R3R4

R5R6R7R8R9R10R11R12BO 15

BO 14

BO 13

P3P4

NC or NOwith Jumper

BO16

P5P6P7P8

BO 20

BO 21

BO 22

BO 23

P9P10P11P12P13P14P15P16

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12P17P18N1N2N3

N4N5N6

N7N8N9N10N11

BI 9

BI 10

BI 11

BI 12

BI 13

BI 14

BI 15

BI 16N12

Fast BO4

Fast BO5

Fast BO6

Fast BO7R15

R16

R17

R18

R13

R14


Fast BO1

Fast BO2

Fast BO3

BO8

BO9BO10BO11

BO12

BO 17

BO 18

BO 19

Flush mounting

Surface mounting

50

100

49

99

48

9847

97

45

95

44

94

46

96

7525742473

237222

7121702069199040893986

368535

843483338232

173123172122171121170120169119168118

190140189139188

138

187137186136185135184134

174

124

L+ (37)

L-(38)

149199148198

197147196146195145194144

Figure 43

Housing 1/1 x 19’‘, Medium Version 7SA522*-*C, 7SA522*-*G and 7SA522*-*Lwith 16 Binary Inputs and 24 Binary Outputs





=

=(~)

IA

IB

IC

I4

VA

VB

VC

V4

Q1

Q3

Q5

Q7

Q2

Q4

Q6

Q8

Serial

Interfaces

K1+

-K2

K3

K4

K5K6K7K8K9K10K11K12K13K14K15K16


BO 14

BO 13

P3P4

NC or NOwith Jumper

BO16

P5P6P7P8

BO 17

BO 18

BO 19

BO 20

BO 21

BO 22

BO 23

P9P10P11P12P13P14P15P16H3H4NC or NO

with Jumper

BO24

H5H6H7H8

BO 25

BO 26

BO 27BO 28

BO 29

BO 30

BO 31

H9H10H11H12H13H14H15H16

Fast BO1

Fast BO2

Fast BO3

Fast BO4

Fast BO5

Fast BO6

Fast BO7

BO8

BO9BO10BO11

BO12

K17K18J1J2J3

J4J5J6

J7J8J9J10J11

BI 1

BI 2

BI 3

BI 4

BI 5

BI 6

BI 7

BI 8J12P17P18N1N2N3

N4N5N6

N7N8N9N10N11

BI 9

BI 10

BI 11

BI 12

BI 13

BI 14

BI 15

BI 16N12H17H18G1G2G3

G4G5G6

G7G8G9G10G11

BI 17

BI 18

BI 19

BI 20

BI 21

BI 22

BI 23

BI 24G12

R15

R16

R17

R18

R13

R14

Flush mounting

Surface mounting

50

100

49

99

48

9847

97

45

95

44

94

46

96

7525742473

237222

7121702069199040893986

368535

8434833382326818671766

166515

641463136212

173123

122171121170120169119168118

149199148198197147196146195145194144

190140189139188138

187137186136185135184134166116165115164114

163113162112161111160110

174

124

L+ (37)

172

L- (38)

Figure 44

Housing 1/1 x 19’‘, Maximum Version 7SA522*-*D, 7SA522*-*H and 7SA522*-*Mwith 24 Binary Inputs and 32 Binary Outputs

Siemens SIP 4.2 · 08/99 41


42 Siemens SIP 4.2 · 08/99

Dimension drawings

Figure 45

Flush mounting 1/2 x 19’‘ with screw andplug-in terminals

225 (8.86)

220 (8.66)

5 (0.20) or M4

6 (0.24)

255.8

±0.3

(10.0

7±

0.0

12

)

245

+1

(9.6

4+

0.0

39

)

4.3

(0.1

7)

7.3(0.29)

13.2(0.52)

180 ± 0.5 (7.09 ± 0.020 )

206.5 ± 0.3 (8.13 ± 0.012 )

221 +2 (8.70 + 0.079 )

244

(9.6

1)

266

(10.4

7)

2(0.08)

29.5(1.16)

172 (6.77) 34(1.34)

29(1.14)

30(1.18)

266

(10.4

7)

29.5(1.16)

172 (6.77)

244

(9.6

1)

34(1.34)

2(0.08)

Housing 1/2 x 19’‘

Rear view


Panel cutout

Side view withscrew terminals

Side view withplug-in terminals

Note: Dimensions are indicated in millimeters;values stated in brackets are inches

Siemens SIP 4.2 · 08/99 43

Dimension drawings


Figure 46

Flush mounting 1/1 x 19’‘ with screw andplug-in terminals

450 (17.72)

445 (17.52)

255

.8±

0.3

(10.0

7±

0.012

)

245

+1

(9.6

4+

0.039

)

6 (0.24)

4.3

(0.1

7)

7.3(0.29)13.2

(0.52) 13.2(0.52) 13.2

(0.52)

216.1 ± 0.3 (8.51 ± 0.012 )

425.5 ± 0.3 (16.75 ± 0.012 )

446 +2 (17.56 + 0.079 )

6 (0.24)

6 (0.24)

6 (0.24)

5 (0.20)

or M4

5 (0.20)

or M4

5 (0.20)

or M4

5 (0.20)

or M4

244

(9.6

1)

266

(10

.47)

2(0.08)

29.5(1.16)

172 (6.77) 34(1.34)

29(1.14)

30(1.18)

266

(10

.47)

29.5(1.16)

172 (6.77)

244

(9.6

1)

34(1.34)

2(0.08)


Rear viewHousing 1/1 x 19’‘

Panel cutout

Side view withscrew terminals

Side view withplug-in terminals

44 Siemens SIP 4.2 · 08/99

9 (0.35)

1 25

26 50

51 75

76 100

240 (9.45)

219 (8.62) 10.5(0.41)

225 (8.86)

280

(11

.02)

320

(12

.60)

344

(13

.54)

266

(10

.47)

260 (10.24)

29.5(1.16)

71(2.80)

72(2.83)

52(2.05)

25

(0.9

8)

1 50

51 100

200

101

151

150

280

(11

.02)

320

(12

.60)

344

(13

.54)

10.5(0.41)

465 (18.31)

444 (17.48)

450 (17.72)

9 (0.35)

Figure 47

Surface mounting 1/1 and 1/2 x 19’‘


Front view

Housing 1/1 x 19’‘Front view


Side view


Dimension drawings

Siemens SIP 4.2 · 08/99 45

Appendix

Explanation of ANSI numbers, IEC designation

ANSInumber

IEC ANSI Standard 7SA522

14 Underspeed device. A device that functions when the speed of a machinefalls below a determined value.

–

21

21N

Distance relay. A relay that functions when the circuit admittance, impedance,or reactance increases or decreases beyond a predetermined value.

Phase distance measurement

Ground distance measurement

FL Fault locator

25 Synchronizing or synchronism-check device. A device that operates whentwo ac circuits are within the desired limits of frequency, phase angle and voltageto permit or cause the paralleling of these two circuits.

Synchro-check function

27

27WI

U< Undervoltage relay. A relay that operates when its input voltage is less than apredetermined value.

Phase-Ground undervoltage incombination with Weak Infeedtrip function

32 Directional power relay. A relay that operates on a predetermined value of powerflow in a given direction or upon reverse power flow such as that resulting from themotoring of a generator upon loss of its prime mover.

–

33 Position switch. A switch that makes or breakes contact when the main deviceor piece of apparatus that has no device function number reaches a given position.

Application of programmable logic

34 Master sequence device. A device such as a motor opoerated multicontact switch,or the equivalent, or a programming device, such as a computer, that establishesor determines the operating sequence of the major devices in equipment duringstarting and stopping or during other sequencial switching operations.


37 I< Undercurrent or underpower relay. A relay that functions when the current orpower flow decreases below a predetermined value.

Application of programmablelogic. Operating measured valueand limit value module

46 I2 Reverse-phase or phase-balance current relay. A relay that functions when thepolyphase currents are of reverse-phase sequence or when the polyphase currentsare unbalanced, or contain negative phase-sequence components above a givenamount.

1. Measured value supervision:current symmetry / balance

2. Application of programmablelogic: Operating measured valueand limit value module

47 Phase-sequence or phase-balance voltage relay. A relay that functions upon apredetermined value of polyphase voltage in the desired phase sequence, whenthe polyphase voltages are unbalanced, or when the negative phase-sequence voltage.

1. Measured value supervision:voltage symmetry / balance

2. Application of programmablelogic: Operating measured valueand limit value module

48 Incomplete sequence relay. A relay that generally returns the equipment to thenormal, or off, position and locks it out if the normal starting, operating, or stoppingsequence is not properly completed within a predetermined time.


49 Machine or transformer thermal relay. A relay that functions when the temperatureof a machine armature winding or other load-carrying winding or element of a machineor power transformer exceeds a predetermined value.

–

50

50N

50N-2

50BF50HS

50 STUB50N STUB

I>>, I>

3I0>>>,3I0>>, 3I0>

3I0>

Iph

I>>>

Iph STUB

3I0 STUB

Instantaneous overcurrent relay. A relay that functions instantaneously on anexcessive value of current

Phase-overcurrent time protectionas backup

Ground overcurrent time protec-tion (directional)Ground-overcurrent time protec-tion as backup stage

Breaker failure protectionInstantaneous high speeds-o-t-f protection

STUB-bus overcurrent stage,phase and ground

51

51N

51N-2

Ip, 3I0p

3 I0p

3 I0p

AC time overcurrent relay. A relay that functions when the ac input current exceedsa predetermined value, and in which the input current and operating time are inverselyrelated d through a substantial portion of the performance range.

Phase-overcurrent inverse timeprotection as backup

Ground overcurrent inverse timeprotection (directional)

Ground-overcurrent inverse timeprotection as backup stage

52 AC circuit breaker. A device that is used to close and interrupt an ac power circuit un-der normal conditions or the interrupt this circuit under fault or emergency conditions.

–

55 cos ϕ Power factor relay. A relay that operates when the power factor in an ac circuitrises above or falls below a predetermined value.

Application of programmablelogic. Operating measured valueand limit value module

46 Siemens SIP 4.2 · 08/99

Appendix

Explanation of ANSI numbers, IEC designation

ANSInumber

IEC ANSI standard 7SA522

59 U>>, U> Overvoltage relay. A relay that operates when its input voltage is more than apredetermined value.

Phase-ground and zero sequenceovervoltage

62 Time-delay stopping or opening relay. A time-delay relay that serves in conjunctionwith the dvice that initiates the shutdown, stopping or opening operation in anautomatic sequence or protective relay system.

Application of programmablelogic

64 UT> Ground detector relay. A relay that operates upon failure of machine or otherapparatus insulation to ground.

Ground fault detection

66 Notching or jogging device. A device that functions to allow that only a specifiednumber of operations of a given device or equipment, or a specified number ofsuccessive operations within a given time of each other. It is also a device thatfunctions to energize a circuit periodically or for fractions of specified time intervals,or that is used to permit intermittent acceleration or jogging of a machine at lowspeeds for mechanical positioning.

–

67 AC directional overcurrent relay. A relay that functions on a desired value of acovercurrent flowing in a predetermined direction

67 N Directional ground-fault timeovercurrent

68

68 T

Blocking relay is a relay that initiates a pilot signal for blocking or tripping on externalfaults in a transmission line or in other apparatus under predetermined conditions, orcooperates with other devices to block tripping or to block reclosing on an out-of-stepcondition or on power swings

Power swing blocking

Power swing tripping

74

74 TC

Alarm relay. A relay other than an annunciator, as covered under device function 30,that is used to operate, or that operates in connection with, a visual or audible alarm.

Trip circuit supervision

79 AC reclosing relay. A relay that controls the automatic reclosing and locking out of anac circuit interrupter.

Auto reclosing function

81 Frequency relay. A relay that responds to frequency of an electrical quantity, operatingwhen the frequency or rate of change of frequency exceeds or is less than apredetermined value.

Application of programmablelogic: Operating measured valueand limit value module

85

85-21

85-67N

Tele-protection

Carrier or pilot-wire receiver relay is a relay that is operated or restrained by a signalused in connection with carrier-current or dc pilot-wire fault directional relaying.

Pilot schemes for distanceprotection

Pilot schemes for directionalground fault protection

86 Lockout relay. A hand or electrically reset auxiliary relay that is operated upon theoccurence of abnormal conditions to maintain associated equipment or devicesinoperative until it is reset

Trip signal lock-out

87 Differential protective relay. A protective relay that functions on a percentage, phaseangle, or other quantitive difference between two currents or some other electricalquantities.

see product range 7SD or 7UT

Siemens SIP 4.2 · 08/99 47

List of abbreviations used

A, B, C Phase designation according to ANSI

AMZ curvesIDMT characteristics

Inverse time overcurrent protection

ANSI American National Standard Institute

AR Auto-reclosure

ARC Auto-reclosureBI Binary Input

BO Binary Output

CFC Continuous Function ChartDCF77 Time synchronizing signal in Germany

DO D igital Output

EF Earth Fault detection

Flash-EPROM Electrically Programmable and Erasable MemoryFO Fiber Optic Conductor

GPS Global Position System

IBS CommissioningIEC International Electrotechnical Commission

IRIG B Time synchronizing signal via GPS

L1, L2, L3 Phase designation according to IECLED Light Emitting Diode

MHO Circle characteristic in the impedance plane

NC Normally Closed output relay contact, e.g. contacts are closed if relay is not activatedNO Normally Open output relay contact, e.g. contacts are open if relay is not activatedOLM Optical L ink Module

PLC Programmable Logic Control

PLC Power Line CarrierR Relay

SC Substation Controller

SCADA Supervisory Control and Data AquisitionSICAM Substation Information Control Automation and Monitoring System

SIMATIC SIEMENS Automation Technology

SIPROTEC SIEMENS PROTECTION

SIR Source to line impedance ratioRatio of the source impedance behind a relay terminal to the line impedance.

UMZ curvesDT characteristics

Definite time overcurrent protection

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48 Siemens SIP 4.2 · 08/99

Siemens SIP 4.2 · 08/99 49

Conditions of Sale and Delivery · Export RegulationsTrademarks

Subject to the

General Conditions of Supplyand Deliveryfor Products and Services ofthe Electrical and ElectronicIndustry and to any other con-ditions agreed upon with therecipients of catalogs.

Technical data, dimensionsand weights are subject tochange unless otherwise sta-ted on the individual pages ofthis catalog.

The illustrations are for refe-rence only.

We reserve the right to ad-just the prices and shall char-ge the price applying on thedate of delivery.

A En 1.91a

Export Regulations Trademarks

In accordance with thepresent provisions of theGerman Export List and theUS Commercial Control List,export licences are notrequired for the productslisted in this catalog.

An export licence mayhowever be required due tocountry-specific applicationand final destination of theproducts.

Relevant are the exportcriteria stated in the deliverynote and the invoicesubject to a possible exportand reexport licence.

Subject to change withoutnotice.

All product designations usedare trademarks or productnames of Siemens AG or ofother suppliers.

Siemens Online

The Power Transmission andDistribution Group can alsobe found in the Internet:

http://www.ev.siemens.de

Conditions of Sale and Delivery

Responsible for

Technical contents: Michael Claus,Product Manager Distance ProtectionSiemens AG, EV S V13, Nuremberg, Germany

Ordering No: E50417-K1176-C114–A

Printed in Germany

Siemens Aktiengesellschaft Subject to change without notice Ordering No: E50417-K1176-C114–APrinted in Germany

Power Transmission andDistribution GroupProtection and SubstationControl Systems Division

P.O. Box 48 06

D-90026 Nuremberg

http://www.ev.siemens.de

7sa522 catalogue

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