spaj 110 c earth-fault relay

o IRFI

1311

[ ]sk

>t0.5

0.05 1.0

2.5

0.5

0.5

0.05 1.0

0.1

0.35

0.8

STEP

RESET

SG1

0 1

123456784.0

nI

nI

>>t [ ]s

SPCJ 1C8

B

I

>I o

>>I o

>>I o>I o

STEP

RS 421 Ser.No.

SPAJ 110 C

2

5

1043

B

fn = 50Hz

60Hz

12345

/ >tt

n/II

n ( )>I

n ( )>>I

>>/ tt%[ ]%[ ]

Uaux

80...265V ~–

18...80V –

nI = 1A 5A ( )I

SPCJ 1C8

REGISTERS

0 0 0 0

12345678

0 1

SGR

o

o

o

SPAJ 110 CEarth-fault relay

User´s manual and Technical description

2

SPAJ 110 CEarth-fault relay

Contents Features .......................................................................................................................... 2Application ..................................................................................................................... 2Description of operation ................................................................................................. 3Connections ................................................................................................................... 4Configuration of output relays ........................................................................................ 6Start and operation indicators ......................................................................................... 7Combined power supply and I/O module ...................................................................... 7Technical data (modified 2002-04) ................................................................................. 8Examples of application ................................................................................................ 10Recorded data and fault analysis ................................................................................... 14Secondary injection testing ........................................................................................... 14Maintenance and repair ................................................................................................ 18Spare parts .................................................................................................................... 18Ordering numbers ........................................................................................................ 18Dimensions and instructions for mounting .................................................................. 19Order information ........................................................................................................ 19

The complete manual for the earth-fault relay SPAJ 110 C includes the following partial manuals:

Earth-fault relay SPAJ 110 C, general part 1MRS 750801-MUM ENNon-directional earth-fault relay module SPCJ 1C8 1MRS 750603-MUM ENGeneral characteristics of C-type relay modules 1MRS 750328-MUM EN

Features Low-set neutral overcurrent stage with definitetime or inverse time characteristic

High-set neutral overcurrent stage with definitetime characteristic

Output relay functions to be freely configured

Flexible adaptation to different types of applica-tion

Serial interface for connecting the relay to a fibreoptic object bus and substation and networkcontrol systems

Digital display of setting values, neutral currentmeasured, memorized fault values, etc.

Continuous self-supervision with auto-diagnos-tics of hardware and software

Application The earth-fault relay SPAJ 110 C is designed tobe used for selective earth-fault protection, ei-ther primary or back-up protection, in solidlyearthed or low-resistance earthed power sys-tems.

The relay has two protection stages: a low-setovercurrent stage I0> and a high-set overcurrentstage I0>>. The low-set stage operates with

definite-time characteristic or with inverse-timecharacteristic, while the high-set stage operateswith definite time characteristic only. The earth-fault relay is used both as primary and back-upearth-fault protection relay for feeders, trans-formers, generators and motors. The relay canbe configured to cooperate with a residual volt-age relay used for blocking/deblocking the op-eration of the earth-fault relay.

1MRS 750801-MUM EN

Issued 1997-07-02Modified 2002-04-22Version B (replaces 34 SPAJ 21 EN1)Checked MKApproved OL

Data subject to change without notice

3

Description ofoperation

The earth-fault relay SPAJ 110 C is a secondaryrelay that is connected to the current transform-ers of the object to be protected. The earth-faultcurrent can be measured either via a set of threephase current transformers in a residual currentconnection or a window-type core-balance cur-rent transformer. When a core-balance currenttransformer is used, it should be secured that therepeatability of the current transformer is suffi-cient also at high earth-fault currents. When anearth-fault occurs, the relay delivers an alarmsignal, trips the circuit breaker or starts anexternal auto-reclose relay, depending on theapplication and the configuration of the relay.

When the energizing current exceeds the setstart value I0> of the low-set stage, the earth-fault relay starts. When, at definite time opera-tion, the set operate time t> or, at IDMT opera-tion, the calculated operate time t>, expires, therelay operates. In the same way the high-set stage

starts once its set start value I0>> is exceededand, when the set operate time t>> expires, therelay operates.

The low-set stage of the earth-fault relay can begiven either definite-time or inverse-time char-acteristic. At inverse time characteristic fourinverse time curve sets with different degrees ofinversity are available: Normal inverse, Veryinverse, Extremely inverse and Long-time in-verse. These curve sets comply with the BS 142and IEC 60255 standards.

The start signal from the earth-fault relay isreceived as contact function. The start signal canbe used, for instance, for blocking cooperatingprotection relays.

The relay contains one optically isolated logicinput for incoming external control signals,generally blocking signals.

NON-DIRECTIONAL DEFINITE TIME OR INVERSE TIME EARTH-FAULT PROTECTION STAGE Io>

NON-DIRECTIONAL DEFINITE TIME EARTH-FAULT PROTECTIONSTAGE Io>>

BLOCKING OF ONE EARTH-FAULT PROTECTION STAGE OR BOTH

SERIAL COMMUNICATION PORT

51N

50N

TRIP 1

TRIP 2

START 1

IRF

SIGNAL 1

SERIAL I/O

Io

BLOCKING

START 2

Fig. 1. Protection functions of the earth-fault relay SPAJ 110 C. The encircled numbers refer to theANSI (=American National Standards Institute) number of the concerned protection function.

4

Fig. 2. Connection diagram for the earth-fault relay SPAJ 110 C.

Uaux Auxiliary voltageA, B, C, D, E, F Output relaysIRF Self-supervision functionBS Blocking signalSS Start signalTS Trip signalSGR Switchgroup for configuring trip and alarm signalsSGB Switchgroup for configuring blocking signalsTRIP_ Trip outputSIGNAL1 Signal on relay operationSTART_ Start signal or signal on relay operationU1 Non-directional earth-fault relay module SPCJ 1C8U2 Power supply and I/O module SPTU 240S1 or SPTU 48S1U3 I/O module SPTE 1E12SERIAL PORT Serial communication portSPA-ZC_ Bus connection moduleRx/Tx Optical-fibre receiver (Rx) and transmitter (Tx) of the bus connection module

BS

L1L2L3

5A 1ASPAJ 110 C U2

U3

1 1 1 1

D C B A

+

Uaux

0

I

0

I

-

-

+

+

25

SGR/1

+ -

+-

(~)(~)

≅ _

10 11 61 62 7877 8180 6968 6665

SGR 7 5 683 2 4

START1 SIGNAL1 TRIP2 TRIP1

SP

A-Z

C_

Rx Tx

26 27

U3

E

717270

IRF

IRF

74 7573

F

START2

TS2

TS1

SGB

SS1

SS2

U1

5

4

I/O

t >>

t >,kIo>

Io>>

SERIALPORT

Connections

5

Mad

e in

Fin

land

25

26

27

73

74

75

70

71

72

61

62

65

66

68

69

80

81

77

78

10

11

TTL

B47

0498

Rx

Tx

Fig.3. Rear view of earth-fault relay SPAJ 110 C.

Specification of input and output terminals

Contacts Function

25-26 Neutral current I0 (In = 5 A)25-27 Neutral current I0 (In = 1 A)10-11 External blocking signal (BS)61-62 Auxiliary power supply.

When DC voltage is used the positive pole is connected to terminal 61.65-66 Trip output 1 for stages I0> and I0>> (TRIP 1)68-69 Trip output 2 for stages I0> and I0>> (TRIP 2)80-81 Signal on tripping of stages I0> and I0>> (SIGNAL 1)77-78 Signal on tripping of stage I0>>, start of stages I0> and I0>> (START 1)73-74-75 Start of stage I0> (START 2). Under normal conditions the contact interval 73-75

is closed. When stage I0> starts, the contact interval 74-75 closes.70-71-72 Self-supervision (IRF) alarm output. Under normal conditions the contact interval

70-72 is closed. When the auxiliary voltage disappears or an internal fault isdetected, the contact interval 71-72 closes.Protective earth terminal

The earth-fault relay SPAJ 110 C is connectedto the fibre optic data communication bus bymeans of the bus connection module SPA-ZC17 or SPA-ZC 21.

The bus connection module is fitted to the D-type connector (SERIAL PORT) on the rearpanel of the relay. The opto-connectors of theoptical fibres are plugged into the counter con-nectors Rx and Tx on the bus connection mod-ule.

6

The start signal of the I0> stage is firmly/solidlywired to output relay F and the trip signal tooutput relay A. The trip signal of the I0>> stageis wired to output relay A. In addition, the

following functions can be selected with theswitches of the SGR switchgroup on the frontpanel:

Switch Function Factorysetting

SGR/1 Routes the external blocking signal to the neutral current module 1

SGR/2 Routes the start signal of stage I0>> to output relay D 1

SGR/3 Routes the start signal of stage I0> to output relay D 1

SGR/4 Routes the trip signal of stage I0>> to output relay D 1

SGR/5 Routes the trip signal of stage I0>> to output relay C 1

SGR/6 Routes the trip signal of stage I0>> to output relay A 1

SGR/7 Routes the trip signal of stage I0> to output relay C 1

SGR/8 Routes the trip signal of stage I0> to output relay B 1

Configuration ofoutput relays

The circuit breakers can be operated directlyboth with output relay A or output relay B. Thuseither operation stage may have its own output

relay or two separate circuit breakers can beoperated with the same protection relay.

7

2. The yellow LED (I0) on the upper black partof the front plate indicates, when lit, that thevalue of the neutral current I0 is currentlybeing displayed.

3. The red IRF indicator of the self-supervisionsystem indicates, when lit, that a permanentinternal relay fault has been detected. Thefault code appearing on the display once afault has been detected should be recordedand notified when service is ordered.

4. The green Uaux LED on the front panel is litwhen the power supply module operates prop-erly.

5. The LED indicator below a setting knobindicates, when lit, that the setting value isbeing displayed.

6. The LED of the SG1 switchgroup indicates,when lit, that the checksum of the switch-group is being displayed.

The start and operation indicators, the functionof the SG2 software switchgroup and the func-tions of the LED indicators during setting aredescribed more detailed in manual for the non-directional earth-faut relay module SPCJ 1C8.

Start andoperationindicators o IRFI

1311

[ ]sk

>t0.5

0.05 1.0

2.5

0.5

0.5

0.05 1.0

0.1

0.35

0.8

STEP

RESET

SG1

0 1

123456784.0

nI

nI

>>t [ ]s

SPCJ 1C8

B

I

>I o

>>I o

>>I o>I o

STEP

RS 421 Ser.No.

SPAJ 110 C

2

5

1043

B

fn = 50Hz

60Hz

12345

/ >tt

n/II

n ( )>I

n ( )>>I

>>/ tt%[ ]%[ ]

Uaux

80...265V ~–

18...80V –

nI = 1A 5A ( )I

SPCJ 1C8

REGISTERS

0 0 0 0

12345678

0 1

SGR

o

o

o

1. Either current stage has its own operationindicator (I0> and I0>>), located in the rightbottom corner of the front plate of the relaymodule. Yellow light indicates that the con-cerned stage has started and red light that thestage has operated (tripped).

With the SG2 software switchgroup the startand trip indicators can be given a latchingfunction, which means that the LEDs remainlit, although the signal that caused operationreturns to normal. The indicators are resetwith the RESET push-button. An unresetindicator does not affect the operation of therelay.

The combined power supply and I/O module(U2) is located behind the system front panel ofthe protection relay and can be withdrawn afterremoval of the system front panel. The powersupply and I/O module incorporates a powerunit, five output relays, the control circuits ofthe output relays and the electronic circuitry ofthe external control input.

The power unit is transformer connected, thatis, the primary side and the secondary circuitsare galvanically isolated. The primary side isprotected by a slow 1 A fuse F1, placed on thePC board of the module. When the powersource operates properly, the green Uaux LEDon the front panel is lit.

The power supply and I/O module is availablein two versions which have different input volt-age ranges:

- type SPTU 240 S1 Uaux = 80...265 V ac/dc- type SPTU 48 S1 Uaux = 18...80 V dc

The voltage range of the power supply and I/Omodule inserted in the relay is marked on thesystem front panel of the relay.

Combined powersupply and I/Omodule

8

Energizing inputs 1 A 5 ATerminals 25-27 25-26Rated current In 1 A 5 AThermal withstand capabilityCarry continuously 4 A 20 AMake and carry for 10 s 25 A 100 AMake and carry for 1 s 100 A 500 ADynamic current withstand capability,half-wave value 250 A 1250 AInput impedance <100 mΩ <20mΩRated frequency fn acc. to order 50 Hz or 60 Hz

Output contact ratingsTerminals 65-66, 68-69Rated voltage 250 V ac/dcCarry continuously 5 AMake and carry for 0.5 s 30 AMake and carry for 3 s 15 ABreaking capacity for dc, when the manoeuvrecircuit time constant L/R ≤ 40 ms,at the control voltages- 220 V dc 1 A- 110 V dc 3 A- 48 V dc 5 A

Signalling contactsTerminals 70-71-72, 73-74-75, 77-78, 80-81Rated voltage 250 V ac/dcCarry continuously 5 AMake and carry for 0.5 s 10 AMake and carry for 3 s 8 ABreaking capacity for dc, when the signallingcircuit time constant L/R ≤ 40 ms,at the control voltages- 220 V dc 0.15 A- 110 V dc 0.25 A- 48 V dc 1 A

External control inputTerminals 10-11Control voltage level 18...265 V dc or 80...265 V acCurrent consumption when input activated 2...20 mA

Auxiliary supply voltagePower supply and I/O modules and voltage ranges:- type SPTU 240 S1 80...265 V ac/dc- type SPTU 48 S1 18...80 V dcPower consumption under quiescent/operatingconditions ~4 W/~6 W

Technical data(modified 2002-04)

9

Non-directional earth-fault relay module SPCJ 1C8Low-set stage I0>Start current I0>, setting range 0.1...0.8 x InSelectable modes of operation- definite time characteristic

- operate time t> 0.05...100 s- inverse definite minimum time (IDMT) characteristic

- curve sets acc. to IEC 60255-3 and BS 142 Normal inverseVery inverseExtremely inverseLong-time inverse

- time multiplier k 0.05...1.00

High-set stage I0>>Start current I0>>, setting range 0.1...4.0 x In and ∞, infiniteOperate time t>> 0.05...100 s

Data communicationTransmission mode Fibre optic serial busData code ASCIISelectable data transfer rates 300, 1200, 2400, 4800 or 9600 BdFibre optic bus connection module,powered from the host relay- for plastic fibre cables SPA-ZC 21 BB- for glass fibre cables SPA-ZC 21 MMFibre optic bus connection module witha built-in power supply unit- for plastic fibre cables SPA-ZC 17 BB- for glass fibre cables SPA-ZC 17 MM

Insulation Tests *)Dielectric test IEC 60255-5 2 kV, 50 Hz, 1 minImpulse voltage test IEC 60255-5 5 kV, 1.2/50 µs, 0.5 JInsulation resistance measurement IEC 60255-5 >100 MΩ, 500 Vdc

Electromagnetic Compatibility Tests *)High-frequency (1 MHz) burst disturbance testIEC 60255-22-1- common mode 2.5 kV- differential mode 1.0 kVElectrostatic discharge test IEC 60255-22-2 andIEC 61000-4-2- contact discharge 6 kV- air discharge 8 kVFast transient disturbance test IEC 60255-22-4and IEC 61000-4-4- power supply 4 kV- I/O ports 2 kV

Environmental conditionsSpecified ambient service temperature range -10...+55°CLong term damp heat withstand acc. to IEC 60068-2-3 <95%, +40°C, 56 d/aRelative humidity acc. to IEC 60068-2-30 93...95%, +55°C, 6 cyclesTransport and storage temperature range -40...+70°CDegree of protection by enclosurefor panel mounted relay IP 54Weight of relay including flush mounting case 3.0 kg

*) The tests do not apply to the serial port, which is used exclusively for the bus connection module.

10

Examples ofapplication

Example 1.Feeder earth-faultprotection

Fig. 4. Earth-fault relay SPAJ 110 C used for the earth fault protection of a feeder.

The earth-fault relay SPAJ 110 C is used fortwo-stage non-directional earth fault protectionof a feeder. The neutral current can be measuredeither via a set of three phase current transform-ers in residual current connection or a core-balance current transformer.

The residual current connection is obtained byparallelling the secondary sides of the phasecurrent transformers. The accuracy of the re-sidual current connection depends on electricalsimilarity of the current transformers. To secureselectivity and stability at high fault current

levels, current transformers with high accuracylimit factors are recommended especially if thehigh-set stage is to operate instantaneously.

The residual current connection can be used incases with high earth-fault current magnitudes,moderate sensitivity requirements and low cur-rent transformer ratios. In solidly earthed net-works or networks earthed over a low-resistanceresistor or low-impedance coil, the earth-faultcurrent is high enough to guarantee a sufficientaccuracy of the residual current connection formeasuring the earth-fault current.

BS

L1L2L3

5A 1ASPAJ 110 C U2

U3

1 1 1 1

D C B A

+

Uaux

0

I

0

I

-

-

+

+

25

SGR/1

+ -

+-

(~)(~)

≅ _

10 11 61 62 7877 8180 6968 6665

SGR 7 5 683 2 4


SP

A-Z

C_

Rx Tx

26 27

U3

E

717270

IRF

IRF

74 7573

F

START2

TS2

TS1

SGB

SS1

SS2

U1

5

4

I/O

t >>

t >,kIo>

Io>>

SERIALPORT

1) 2)

1) Incoming blocking/deblocking signal from residual voltage relay2) Outgoing blocking signal for the busbar earth-fault relay

11

Generally, the earth-fault relay SPAJ 110 Crequires no blocking from a cooperating re-sidual voltage relay. However, when required,the stability of the earth-fault relay can be se-cured with a blocking signal obtained from theresidual voltage relay of the busbar system. Then,during a no-fault situation, the earth-fault relaysof the feeders are blocked by the residual voltagerelay. When an earth-fault arises on a feeder thefeeder earth-fault relay starts but does not oper-ate until deblocked by the residual voltage relay,when it starts. This blocking function is used toprevent spurious operation of the earth-fault

relay, for instance, due to partial saturation of aphase current transformer.

The low-set stage of the earth-fault relay modulecan be given definite-time or inverse-time char-acteristic. The high-set stage can be used forinstantaneous operation. In the above examplethe start signal of the low-set stage is used forblocking the earth-fault relay of the infeeder,also functioning as busbar earth-fault relay, seealso example 2.

The function selector switches of the earth-faultrelay SPAJ 110 C can be set as follows:

Switch SG1/SPCJ 1C8 SGB/SPCJ 1C8 SGR

1 1 0 Not in use 1 Block. signal from res. volt. relay2 0 0 Not in use 1 I0>> start signal to output relay D3 1 Inverse time 0 Not in use 0 No I0> start sign. to output relay D4 0 No latching 1 Blocking to t> 0 No I0>> trip sign. to output relay D5 0 I0>> no doubling 0 No blocking to t>> 0 No I0>> trip sign. to output relay C6 0 I0>>=0.5...4 x In 0 Not in use 1 I0>> trip signal to output relay A7 0 0 Not in use 1 I0> trip signal to output relay C8 0 0 Not in use 0 No I0> trip signal to output relay B

∑ 5

When the switches are set as above, the outputcontacts of SPAJ 110 C carry the followingsignals:

Contact Function

65-66 Circuit breaker trip signal, stages I0>, I0>>68-69 Signal on final trip, stage I0>>80-81 Signal on final trip of stage I0>77-78 Start signal of stage I0>>73-74-75 Start signal of stage I0> , blocking signal to the earth-fault relay of the

busbar system70-71-72 Self-supervision signal

Very inverse

t>>=0.05...1 s

12

0

I

0

I

-

-

+

+I

II

BS

5A 1A

SPAJ 110 C U2

U3

1 1 1 1

D C B A

+

Uaux

25

SGR/1

+ -

+-

(~)(~)

≅ _

10 11 61 62 7877 8180 6968 6665

SGR 7 5 683 2 4


SP

A-Z

C_

Rx Tx

26 27

U3

E

717270

IRF

IRF

74 7573

F

START2

TS2

TS1

SGB

SS1

SS2

U1

5

4

I/O

t >>

t >,kIo>

Io>>

0

I

0

I

-

-

+

+

+

1)

SERIALPORT

1) Incoming blockingsdeblockings from the earth-fault relays of the outgoing feeders

Example 2.Earth-fault protec-tion of infeeder andbusbar system, back-up protection offeeders

Fig. 5. Earth-fault relay SPAJ 110 C for the earth-fault protection of an infeeder and back-upprotection of outgoing feeders.

13

Switch SG1/SPCJ 1C8 SGB/SPCJ 1C8 SGR

1 1 0 Not in use 1 Blocking signal from feeders2 0 0 Not in use 0 No I0>> start sign. to output relay D3 1 Inverse time 0 Not in use 0 No I0> start signal to output relay D4 1 Latching 0 No blocking to t> 1 I0>> trip signal to output relay D5 0 No I0>> doubling 1 Blocking to t>> 0 No I0>> trip signal to output relay C6 1 I0>>=0.1...0.8 x In 0 Not in use 0 No I0>> trip signal to output relay A7 0 0 Not in use 1 I0> trip signal to output relay C8 0 0 Not in use 0 No I0> trip signal to output relay B

∑ 45

The low-set stage of the earth-fault relay servesas back-up protection for the outgoing feedersand the high-set stage as primary earth-faultprotection of the busbar system. If the earth-fault occurs on an outgoing feeder, the earth-fault relay of the outgoing feeder delivers ablocking signal to the earth-fault relay of theinfeeder on starting. Should the earth-fault oc-cur on the busbar system or in the infeedercubicle, no blocking signal is obtained and theearth-fault relay of the infeeder operates. Theincoming blocking signals are linked to thehigh-set stage of the earth fault relay of theinfeeder with the SGB/5 switch on the PC boardof the earth-fault relay module SPCJ 1C8 of theinfeeder earth-fault relay.

The neutral current is measured via a currenttransformer located in the neutral earthing cir-

cuit on the LV side of the power transformer.

On operation the high-set stage of the earth-fault relay trips the circuit breaker on the HVside of the power transformer. Thus an earth-fault on the busbar system is rapidly discon-nected. The low-set stage trips the circuit breakeron the LV side of the power transformer. Thisallows operate times of down to 100 ms atbusbar earth-faults.

In the above example the trip relay has beengiven a latching function (SG1/4=1). The triprelay can be manually reset from the front panelof the relay, or via a command over the serialbus.

The function selector switches of the earth-faultrelay SPAJ 110 C can be set as follows:

When the switches are set as above, the outputcontacts of SPAJ 110 C have the followingfunctions:

Contact Function

65-66 LV side circuit breaker trip signal, stage I0>68-69 HV side circuit breaker trip signal, stage I0>>80-81 Signal on final trip of stage I0>77-78 Signal on final trip of stage I0>>73-74-75 Start signal of stage I0>70-71-72 Self-supervision signal

Very inverse

t>>=0.05...1 s

14

The data recorded in the registers of the relaycan be used both to analyze an earth-fault situ-ation and to study the behaviour of the protec-tion equipment.

Register 1 stores the maximum measured neu-tral current of the relay as a multiple of the ratedcurrent of the energizing input used. If the relayoperates, the current measured at the momentof operation is memorized. A new relay opera-tion erases the previous value from the registerand updates the register contents. The register isalso erased and updated whenever the measuredcurrent exceeds the currently recorded value.

The level of the neutral current value recordedin a fault situation shows the degree of develop-ment of the earth fault. The data of register 1also show how close the relay’s start current is tothe actual fault current value.

Correspondingly the ratio between the set startcurrent and the current values during normaloperation can be determined by reading thenormal current values via the display of the relay.

The number of times the different stages havestarted, registers 2 and 3, provides information

on the occurrence of earth-faults and informa-tion on the distribution of earth-faults in respectof the fault resistance. Frequent starts may be asign of an imminent earth-fault or some kind ofdisturbance apt to cause an earth-fault.

Registers 4 and 5 show the duration of the lateststart situation of the stages, expressed in per centof the set operate time or, at inverse time opera-tion the calculated operate time. Any new startresets the counter, which restarts from zero. Ifthe stage operates, the register value will be 100.

The registers 4 and 5 give information on theduration of an earth-fault, or, if a final trip hasbeen performed, the safety margin of the grad-ing times of the selective protection. If, forinstance, the value of register 4 of the busbarearth-fault relay operating as feeder back-upprotection is 75 when the earth-fault relay of thefeeder has operated, the safety margin betweenthe primary protection and the back-up protec-tion is 25%.

The registers 1...5 are reset either by pressing theSTEP and RESET push-buttons simultaneouslyor with a command, V102, over the SPA bus.

Recorded dataand fault analysis

Testing, both primary and secondary, shouldalways be performed in accordance with na-tional regulations and instructions.

The protection relay incorporates an IRF func-tion that continuously monitors the internalstate of the relay and produces an alarm signal onthe detection of a fault. According to the manu-facturer’s recommendations the relay should besubmitted to secondary testing at five years’intervals. These tests should include the entireprotection chain from the instrument trans-formers to the circuit breakers.

The secondary testing described in this manualis based on the relay’s setting values duringnormal operation. If necessary, the secondarytesting can be extended by testing the protectionstages throughout their setting ranges.

As switch positions and setting values have to bealtered during the test procedure the correctpositions of switches and the setting values ofthe relay during normal operation conditionshave to be recorded, for instance, on the refer-ence card accompanying the relay.

To enable secondary injection testing the relayhas to be disconnected, either through discon-nectable terminal blocks or a test plug fitted onthe relay.

DANGER!Do not open the secondary circuit of a cur-rent transformer under any phases of thetesting, if the primary circuit is live. The highvoltage produced by an open CT secondarycircuit could be lethal and may damage in-struments and insulation.

When auxiliary voltage is connected to theprotection relay, the relay performs a self-testingprogram, which does not includes the matchingtransformers and the contacts of the outputrelays. The operational condition of the relay istested by means of ordinary relay test equipmentand such a test also includes the matching trans-formers, the output relays and the accuracy ofthe operate values.

Equipment required for testing:

- adjustable voltage transformer 0...260 V, 1 A- current transformer- ammeter, accuracy ±0.5%- stop watch or counter for time measurement- dc voltage source- switches and indicator lamps- supply and pilot wires- calibrated multimeter

Secondaryinjection testing

15

The secondary current of the current trans-former is to be selected on the basis of the ratedcurrent, 1 A or 5 A, of the relay energizing input

to be tested. The energizing inputs are specifiedunder the heading "Technical data, Energizinginputs".

5A1A

SP

AJ

110

CU

2

U3

11

11

DC

BA

25

SG

R/1

U3

+-

E_

1011

6162

7172

7078

7781

8069

6866

65

SG

R7

56

83

24SIG

NA

L1T

RIP

2T

RIP

1

2627

IRF

Uau

x

+(~

)

-(~

)

A

TIM

ER

ST

AR

T

S1

L1N

S2

L2L3

BS

ST

AR

T1

TIM

ER

S

TO

P

≅

IRF

L1L4

TS

2

TS

1

SG

B

SS

1

SS

2

U1 54

I/O

t >>

t >,

kIo

>

Io>>

7374

75

ST

AR

T2

Fig. 6. Secondary injection test connection for earth-fault relay SPAJ 110 C.

When the test connection has been completedand the selector switches properly set, the auxil-iary voltage is connected to the relay.

The operation of the test connection can beverified by using a multimeter.

16

Apply a pure sinusoidal voltage to the relay andcompare the current value indicated on thedisplay of the relay with that shown by theammeter. The measurements can be made, for

instance, at the rated current of the relay. Notethat the relay shows the measured current as amultiple of the rated current In of the energizinginput used.

Testing of internalmatching trans-formers

Set the switches of the SGR switchgroup asfollows before starting the test:

Switch Position

1 12 03 04 05 06 07 18 0

When the switches are set as above, the outputrelays have the following functions.

Output relays Function(terminals)

A (65-66) Trip signal of stage I0>B (68-69) (Trip signal of stage I0>>)C (80-81) Signal on trip of stage I0>>D (77-78) Not in useE (71-72) Self-supervision signal (L1)F (74-75) Start signal of stage I0> (L2)

Starting

Carry out the test according to Fig. 6. Close theS1 switch and increase the test current slowlyuntil the relay starts (L2 is lit). Then read thestart current value indicated by the ammeter.

Operate time

Definite-time characteristic

Set the test current at 2 x the set start value ofstage I0>. The clock is started by the closing ofswitch S1 and stopped via contact 65-66, whenoutput relay A picks up.

The operation of output relay C is indicated byL4.

When the relay starts, the I0> LED in the rightbottom corner of the front panel is lit withyellow light. When the relay operates, the indi-cator LED turns red.

Inverse time characteristic

At inverse-time characteristic, the operate timeis measured with two different test current val-ues (2 x I0> and 10 x I0>). The operate timesthus obtained are compared with the operatetimes received from the current/time curves forthe concerned inverse-time characteristic.

Blocking

Set switches 4 and 5 of switchgroup SGB andswitch SGR/1 in position 1 (ON).

Apply a control voltage on the auxiliary voltagelevel to the external control input of the relay byclosing switch S2. Increase the test current untilthe low-set stage I0> starts. After the set operatetime the low-set stage is not allowed to operateas long as the blocking is active.

Testing of the low-set stage I0>

17

Set the switches of the SGR switchgroup on thefront panel as follows before starting the test ofthe high-set stage:

Switch Position

1 12 13 04 05 16 07 08 0

When the switches are set as above, the outputrelays have the following functions

Output relays Function(terminals)

A (65-66) (Operation of stage I0>)B (68-69) Operation of stage I0>>C (80-81) Signal on trip of stage I0>>

(L4)D (77-78) Start signal of stage I0>> (L3)E (71-72) Self-supervision signal (L1)F (74-75) (Start signal of stage I0>)

The test procedure is the same as for the low-setstage, but with the exception that, when theoperate times are measured, the clock is stoppedvia contact 68-69, output relay B.

Note!The current carrying capacity of the wiring,terminals and matching transformers of therelay is limited, see chapter "Technical data".The test wires should have an cross-section of 4mm2. Then 100 A is allowed to be connected formax. 1 s to a 1 A energizing input and for max.10 s to a 5 A energizing input.

Testing of the high-set stage I0>>

Testing of self-supervision outputrelay (IRF)

The self-supervision system and the function ofthe IRF LED and the output relay E can betested in the Trip test mode described in the

document "General characteristics of C-typerelay modules". The operation of output relay Eis indicated by L1.

18

Maintenanceand repair

When used under the conditions specified inthe section "Technical data", the relay requirespractically no maintenance. The relay includesno parts or components that are sensitive toabnormal physical or electrical wear under nor-mal operating conditions.

If the environmental conditions on site differfrom those specified, as to temperature andhumidity, or if the atmosphere around the relaycontains chemically active gases or dust, therelay should be visually inspected during therelay secondary testing. The visual inspectionshould focus on:

- Signs of mechanical damage on relay case andterminals

- Dust accumulated inside the relay cover orcase; remove carefully with compressed air ora soft brush

- Signs of corrosion on terminals, case or com-ponents inside the relay

If the relay fails in operation or if the operationvalues considerably differ from those stated inthe relay specifications, the relay should be givena proper overhaul. Minor measures, such asexchange of a faulty module, can be taken bypersonnel from the customer’s instrument work-shop, but major measures involving the elec-tronics are to be taken by the manufacturer.Please contact the manufacturer or his nearestrepresentative for further information aboutchecking, overhaul and calibration of the relay.

Note!The protection relays contain electronic circuitswhich are liable to serious damage due to elec-trostatic discharge. Before removing a module,ensure that you are at the same electrostaticpotential as the equipment by touching the case.

Note!Static protection relays are measuring instru-ments and should be handled with care andprotected against damp and mechanical stress,especially during transport and storage.

Spare parts Non-directional earth-fault relay module SPCJ 1C8Combined power supply and I/O module- Uaux = 80...265 V ac/dc SPTU 240S1- Uaux = 18...80 V dc SPTU 48S1Case (including I/O module) SPTK 1E12I/O module SPTE 1E12Bus connection module SPA-ZC 17_ or SPA-ZC 21_

Orderingnumbers

Earth-fault relay without test adapterSPAJ 110 C RS 421 010 -AA, CA, DA, FA

Earth-fault relay with test adapter RTXP 18SPAJ 110 C RS 421 210 -AA, CA, DA, FA

The two last letters of the ordering number designate the rated frequency fn andthe Uaux voltage range of the relay as follows:

AA: fn = 50 Hz and Uaux = 80...265 V ac/dcCA: fn = 50 Hz and Uaux = 18...80 V dcDA: fn = 60 Hz and Uaux = 80...265 V ac/dcFA: fn = 60 Hz and Uaux = 18...80 V dc

19

The relay case is basically designed for flush-mounting. The mounting depth can be reducedby the use of a raising frame: type SPA-ZX 111reduces the depth behind the mounting panel

by 40 mm, type SPA-ZX 112 by 80 mm andtype SPA-ZX 113 by 120 mm. The relay canalso be mounted in a case for surface mounting,type designation SPA-ZX 115.

Dimensions andinstructions formounting

Fig. 7. Dimensions of the earth-fault relay SPAJ 110 C

The relay case is made of profile aluminium andfinished in beige.

A rubber gasket fitted on the mounting collarprovides an IP54 degree of protection betweenrelay case and mounting panel, when the relay isflush mounted.

The hinged cover of the relay case is made of aclear, UV stabilized polycarbonate, and pro-vided with a sealable fastening screw. A gasket

along the edge of the cover provides an IP54degree of protection between the case and thecover.

All input and output wires are connected to thescrew terminal blocks on the rear panel. Eachterminal is dimensioned for one max. 6 mm2

wire or two max. 2.5 mm2 wires. The D-typeconnector connects to the serial communica-tion bus.

Informationrequired withorder

1. Quantity and type designation 15 pces relay SPAJ 110 C2. Order number RS 421 010-AA3. Rated frequency fn = 50 Hz4. Auxiliary voltage Uaux = 110 V dc5. Accessories 15 bus connection modules SPA-ZC 21 MM

2 fibre optic cables SPA-ZF MM 10014 fibre optic cables SPA-ZF MM 5

6. Special requirements –

Raising frame

SPA-ZX 111SPA-ZX 112SPA-ZX 113

176136 96

74114154

a b

a b

Panel cut-out

129 ±1

139

±1

142

162

136

3034

250

186216

o IRFI

1311

[ ]sk

>t0.5

0.05 1.0

2.5

0.5

0.5

0.05 1.0

0.1

0.35

0.8

STEP

RESET

SG1

0 1

123456784.0

nI

nI

>>t [ ]s

SPCJ 1C8

B

I

>I o

>>I o

>>I o>I o

STEP

SPCJ 1C8Non-directional earth-fault relay module


2

SPCJ 1C8Non-directional

earth-fault relay module

Contents Features .......................................................................................................................... 2Description of function .................................................................................................. 3Block diagram................................................................................................................. 4Front panel ..................................................................................................................... 5Start and operation indicators ......................................................................................... 6Relay settings .................................................................................................................. 6Selector switches ............................................................................................................. 7Measured information .................................................................................................... 8Recorded information ..................................................................................................... 9Main menu and submenus of settings and registers ...................................................... 10Time/current characteristic (modified 2002-05) ............................................................ 11Technical data .............................................................................................................. 16Event codes ................................................................................................................... 17Remote transfer data ..................................................................................................... 18Fault codes .................................................................................................................... 21

Both neutral overcurrent stages can sep-aratelybe blocked with an external control signal

Memory controlled function of start and opera-tion indicators selectable

Digital display of measured and set values as wellas data recorded at the moment a fault occurs

Constant self-supervision of hardware and soft-ware. At a permanent fault the alarm outputrelay picks up and the operation of tripping andsignalling outputs is blocked

Features Low-set neutral overcurrent stage I0> withselectable definite time or inverse definite mini-mum time (IDMT) operation characteristic

High-set neutral overcurrent stage I0>> withdefinite time operation characteristic

Automatic doubling feature of the set start valueof the high-set stage I0>> on sudden rise of theenergization current can be selected

The high-set stage I0>> can be set out of opera-tion if not needed

1MRS 750603-MUM EN

Issued 1996-12-31Modified 2002-05-15Version B (replaces 34 SPCJ 3 EN1)Checked MKApproved OL


3

The non-directional earth-fault relay moduleSPCJ 1C8 is a single-pole neutral overcurrentrelay module. It contains two neutral overcur-rent stages, i.e. a low-set overcurrent stage I0>and a high-set overcurrent stage I0>>.

The low-set or high-set overcurrent stage startsif the input energizing current exceeds the setstart value of the stage concerned. When start-ing, the stage provides a start signal SS1 or SS2and simultaneously the operation indicator ofthe stage is lit with yellow colour. If the overcur-rent situation lasts long enough to exceed the setoperate time, the stage that started also operatesand provides a tripping signal, TS1 or TS2. Atthe same time the operation indicator of theconcerned stage turns red. The start and opera-tion indicators can individually be given self-reset or manual reset mode of operation. If theself-reset mode of operation is selected, theindicator is automatically turned off when thestage resets. If the manual reset mode is selectedthe indicators are reset with the RESET push-button on the front panel of the relay module orvia the serial port by means of the commandV102 or V101.

The operation of the low-set overcurrent stageI0> can be blocked by routing a blocking signalBTS1 to the stage. Similarly, the starting of thehigh-set current stage I0>> can be blocked by ablocking signal BTS2. The blocking signals arerouted by means of switchgroup SGB on thePC-board of the relay module.

If the protection relay incorporates an auto-reclose module, switchgroup SGB is additionallyused for the purpose of selecting proper startsignals for the auto-reclose module. The in-structions for setting the switchgroup are givenin the general description of the protectionrelay, in the diagram illustrating the signal inter-change between the relay modules.

The operation of the low-set overcurrent stageI0> can be based on definite time or inverse time

characteristic. The operation characteristic isselected with switch SG1/3. At definite timecharacteristic the operate time t> is chosen fromone out of three operate time setting ranges. Thesetting range is selected with switches SG1/1and SG1/2. When the inverse time characteris-tic (IDMT) is used four time/current curvegroups, referred to as "Normal, very, extremelyand long-time inverse" are available. The re-quired operation characteristic is selected withswitch SG1/1 and SG1/2.

The operate time t>> of the high-set overcurrentstage I0>> is set separately. The setting range,one of three available alternatives, is selectedwith switch SG1/7 and SG1/8.

The two overcurrent stages are provided with aso called latching facility, which means that thetripping output remains energized, althoughthe signal which caused the operation disap-pears. The latching function is selected withswitch SG1/4 and the stages are reset by pressingthe push-buttons STEP and RESET simultane-ously.

The set start value I0>> of the high-set over-current stage may be automatically doubled onstarting. Thus the start value of the high-setovercurrent stage can be set lower than theconnection inrush current. The doubling fea-ture is selected with switch SG1/5. A start situ-ation is defined as a situation where the energiz-ing current rises from a value below 0.12 x I0>to a value exceeding 3.0 x I0> in less than 60 ms.The start situation ceases when the current fallsbelow 2.0 x I0>.

The start current setting range of the high-setovercurrent stage is selected with switch SG1/6.Two setting ranges are available, 0.5...4 x In and0.1...0.8 x In.

The operation of this stage may be totally blockedby selecting the setting value ∞, infinite.

Description offunction

4

Block diagram

Fig. 1. Block diagram for earth-fault relay module SPCJ 1C8.

I0 Energizing current (neutral current or residual current)BS1, BS2, BS3 External blocking signalsBTS1 Blocking of the operation of stage I0>BTS2 Blocking of the operation of stage I0>>SG1 Selector switchgroup on the front panelSGB Selector switchgroup on the PC board for blocking signals

and for the starting signals for auto-reclose functions, if applicableSS1 Start signal of stage I0>TS1 Operate signal of stage I0>SS2 Start signal of stage I0>>TS2 Operate signal of stage I0>>AR1, AR3 Start initiation signals for auto-reclosure functionsY Yellow indicator, startingR Red indicator, operation

NOTE!All input and output signals of the relay moduleare not necessarily wired to the terminals ofevery protection relay using this module. Thesignals wired to the terminals are shown in the

diagram illustrating the signal interchange be-tween the relay modules of the protection relayor feeder terminal in question.

5

Front panel

o IRFI

1311

[ ]sk

>t0.5

0.05 1.0

2.5

0.5

0.5

0.05 1.0

0.1

0.35

0.8

STEP

RESET

SG1

0 1

123456784.0

nI

nI

>>t [ ]s

SPCJ 1C8

B

I

>I o

>>I o

>>I o>I o

STEP

Current measurement indicator

Indicator and start valuesetting knob of stage I0>

Operate time setting knob andindicator or setting knob for timemultiplier k of stage I0>

Indicator and start valuesetting knob of stage I0>>

Operate time setting knob andindicator of stage I0>>

Simplified device symbol

Self-supervision alarmindicator

Display for set, measuredand recorded values

Display step push-button

Selector switchgroup

Switchgroup indicator

Reset push-button

Start and operationindicatorsType designation ofrelay module

Fig. 2. Front panel of earth-fault relay module SPCJ 1C8.

6

Start andoperationindicators

An unreset operation indicator does not affectthe protective functions of the relay module.The relay module is constantly operative, re-gardless of the indicators have been reset or not.

The self-supervision alarm indicator IRF indi-cates that the self-supervision system has de-tected a permanent internal relay fault. Theindicator is lit with red light shortly after thefault has been detected. At the same time therelay module puts forward a control signal to theself-supervision system output relay of the pro-tection relay unit.

Additionally, in most fault cases, a fault codeshowing the type of the relay fault appears on thedisplay of the module. The fault code consists ofa red number one (1) and a green three-digitcode number. When a fault message appears onthe display, the code number should be noteddown to facilitate the subsequent fault findingand repair work.

Both overcurrent stages have their own yellow/red LED indicators. Yellow light indicates start-ing of the concerned overcurrent stage and redlight indicates that the overcurrent stage hasoperated.

The four LED indicators can, independently ofone another, be given self-reset or manual resetmode of operation. The manual reset modemeans that the indicator remains lit after beingswitched on, although the earth-fault stage,which controls the indicator, resets. If, for in-stance, the yellow start indication is given theself-reset mode and the red indicator the manualreset mode, the yellow indicator is lit, when thestage starts, turning red if and when the stageoperates. When the earth-fault stage resets onlythe red indication remains lit. The indicators,which have been given the manual reset mode,are reset locally by pushing the RESET push-button on the front panel or by remote controlover the SPA bus using the command V101 orV102.

Relay settings The setting values are shown by the threerightmost digits of the display. An LED indica-tor below each setting knob shows, when lit,

which setting value is currently being shown onthe display.

I0>/In Start current of stage I0> as a multiple of the rated current of the used relay energizinginput. Setting range 0.10...0.80 x In.

t> [s] Operate time of stage I0>, expressed in seconds, when the definite time operationcharacteristic (SG1/3 = 0). The setting range, i.e. 0.05...1.00 s, 0.5...10.0 s or 5...100 s,is determined by the position of the switches SG1/1 and SG1/2.

When the inverse definite minimum time (IDMT) operation characteristic isselected, switch SG1/3 = 1, the time multiplier k is set within the setting range0.05...1.00.

I0>>/In Start current of stage I0>> as a multiple of the rated current of the used relay energizinginput. The setting range, i.e. 0.5...4.0 x In or 0.1...0.8 x In, is selected with switchSG1/6. Addi- tionally, the setting infinite "∞" (displayed as - - -) can be selected,which means that stage I0>> is ot of function.

t>> [s] The operating time of the I0>> stage, expressed in seconds. The setting ranges,0.05...1.00 s, 0.5...10.0 s or 5...100 s, are determined by the position of switchesSG1/7 and SG1/8.

Further, the checksum of the function selectorswitchgroup SG1 is indicated on the displaywhen the indicator under the switchgroup is lit.In this way a check can be carried out to provethat the switches have been set as planned and

that the switches themselves work properly. Anexample of calculating the checksum is given inthe description "General characteristics of Ctype relay modules".

7

the front panel. The numbering of the switches,1...8, as well as the switch positions 0 and 1 aremarked on the front panel.

Selector switches Additional functions required by individualapplications are selected by means of the programselector switches of switchgroup SG1 located on

Switch Function

SG1/1 Switch SG1/3 is used for selecting the operation characteristic of the low-set currentSG1/2 stage I0>, i.e. definite time characteristic or inverse definite minimum time (IDMT)SG1/3 characteristic. At definite time characyeristic the setting range of the operate time t>

is selected by means of switches SG1/1 and SG1/2 whereas, at inverse definiteminimum time characteristic the switches are used for selecting the time/currentcharacteristic of the low-set stage I0>.

SG1/1 SG1/2 SG1/3 Characteristic Operation time t> ortype of characteristic

0 0 0 Definite time 0.05...1.00 s1 0 0 " 0.5...10.0 s0 1 0 " 0.5...10.0 s1 1 0 " 5...100 s

0 0 1 IDMT Extremely inverse1 0 1 IDMT Very inverse0 1 1 IDMT Normal inverse1 1 1 IDMT Long-time inverse

SG1/4 Selection of mode of operation for the operate signals TS1 and TS2.

When SG1/4 = 0, the operate signals returns to the initial state (= the output relaydrops off), when the energizing signal causing the operation falls below the set startlevel.When SG1/4 = 1, the operate signals remain on (= the output relay operated), althoughthe energizing signal falls below the set start level. Resetting with command V101 viathe serial interface or by pressing the push-buttons STEP and RESET simultaneously,which also erases the recorded information.

SG1/5 Selection of automatic doubling of the set start value of the high-set current stage I0>>when the protected object is connected to the network.

When SG1/5 = 0, no doubling of the set start value of stage I0>> is obtained.When SG1/5 = 1, the set start value of the stage I0>> doubles automatically.This makes it possible to give the high-set current stage a setting value below theconnection inrush current level of the protected object.

SG1/6 Selection of the setting range of the high-set overcurrent stage I0>>.

When SG1/6 = 0, the setting range is 0.5...4.0 x In and ∞, infiniteWhen SG1/6 = 1, the setting range is 0.1...0.8 x In and ∞, infinite

8

Switch Function

SG1/7 Selection of setting range of the operate time t>> of the high-set overcurrent stage I0>>.SG1/8

SG1/7 SG1/8 Operate time t>>

0 0 0.05...1.00 s1 0 0.5...10.0 s0 1 0.5...10.0 s1 1 5...100 s

Switchgroup SG2 is a so called software switch-goup, which is located in the third submenu ofswitchgroup SG1. The mode of operation, i.e.self-reset or manually reset, of the LED indica-tors I0> and I0>> is determined by the switchesof switchgoup SG2. The mode of operation can

be separately set for each indicator. The mode ofoperation is set by means of the checksum,which can be calculated from the followingtable. Normally the start indications are self-reset and the operation indications manuallyreset.

Indicator Manually reset Factory default

Start indicator I0> 1 0Operation indicator I0> 2 2Start indicator I0>> 4 0Operation indicator I0>> 8 8

Checksum 15 10

The PC board of the relay module contains aswitchgroup SGB including switches 1...8. Theswitches 1...3 are used for selecting start initia-tion signals to a possible auto-reclose relay mod-

ule, whereas switches 4...8 are used for routingexternal control signals to the neutral overcur-rent stages of the relay module in various protec-tion relays.

Measuredinformation

The measured values are displayed by the threerightmost digits of the display. The measured

neutral current is indicated with a LED indica-tor on the front panel.

Indicator Measured current

I0 Neutral current measured by the relay module as a multiple of the rated current Inof the used energizing input of the protection relay.

9

The leftmost digit of the display shows theaddress code of the register and the other threedigits the value of the register.

Recordedinformation

Register/ Recorded informationSTEP

1 Maximum current measured as a multiple of the rated current of the protection. Theregister is updated when one of the following criteria is fulfilled:I) The measured current exceeds the value currently recordedII) The relay module operates. On operation the current value at operation is recorded.

2 Number of starts of the low-set current stage I0>, n (I0>) = 0...255.

3 Number of starts of the high-set current stage I0>>, n (I0>>) = 0...255.

4 Duration of the latest start situation of stage I0> as a percentage of the set operate timet> or at IDMT mode of operation the calculated operate time. A new start resets thecounter which then starts counting from zero. When the concerned stage hastripped, the counter reading is 100.

5 Duration of the latest start situation of stage I0>> as a percentage of the set operatetime t>>. A new start resets the counter which then starts counting from zero. Whenthe concerned stage has tripped, the counter reading is 100.

0 Display of blocking signals and other external control signals. The rightmost digitindicates the state of the blocking inputs of the module. The following states may beindicated:0 = no blockings1 = tripping of the low-set current stage I0> blocked2 = tripping of the high-set current stage I0>> blocked3 = tripping of both operation stages blocked

On this module the middle digit of the register is always a zero. The third digit fromthe right indicates the state of the remote reset input, if the protection relay isprovided with a control input. The following states may be indicated:0 = remote reset control input not energized1 = remote reset control input energized

From this register it is possible to move on to the Trip test mode. For further details,see the description "General characteristics of C-type relay modules".

A Address code of the protection relay module, required by the serial communicationsystem. Register A has three subregisters with the following contents:1) Selection of data transfer rate for the serial communication. Selectable values 300,

1200, 2400, 4800 or 9600 Bd. Default value 9600 Bd.2) Communication interruption counter. If the relay module is connected to a

communication system, which is in operation, the value of the communicationinterruption counter is 0 (zero). If the communication system is disturbed, thenumbers 0…255 are scrolling in the communication interruption counter.

3) Password required for remote setting of relay module parameters.

– Display dark. By pressing the STEP push-button the beginning of the display menuis re-entered.

The registers 1...5 are set to zero by pressing thepush-buttons STEP and RESET simultaneouslyor via the SPA bus with the command V102.The registers are also cleared if the auxiliarypower supply to the module is interrupted. Theaddress code of the relay module, the baud rate

of the serial communication and the passwordare not erased by a voltage failure. The instruc-tions for setting the address and the baud rate aredescribed in the "General characteristics of C-type relay modules".

10

Normal state. Display switched off

Measured residual current Io

21

Remotely setvalue t>> x p4

Set operate time t>> 21

Checksum of switchgroup SG1

Remotely setpercentage p4

1

Set start current Io>>

Set operate time t> or time multiplier k

SUBMENUSSTEP FORWARDS 1 sSTEP BACKWARD 0,5 s

MAIN MENU

STEP

BACKWARD

.5s

STEP

FORWARD

1s

MAIN MENU SUBMENUS

STEP 0,5 s RESET 1 s

1

2

Recorded max. value of the residual current1

Set start current Io>

2 Remotely setchecksum

1 Remotely setchecksum 3 Checksum of

switchgroup SG2

2

Remotely set value Io>> x p3

Remotely setvalue Io> x p1




Number of starts of stage Io>2

3

Duration of latest start situation of stage Io>

5

4

Incoming blockings orcontrol signals0

Relay module address code for communicationA Data transfer

rate [Bd]1

Number of starts of stage Io>>

Communicationcounter 0...255 s2 Password3

Duration of latest start situation of stage Io>>

0 000SS1 TS1 TS2IRF SS2

Remotely set value t> x p2 / k x p2

= value that can be set in the setting mode

The measures required for entering a submenuor a setting mode as well as how to perform thesettings and use the TEST mode are described in

Data Sheet "General characteristics of C-typerelay modules".

Main menu andsubmenus ofsettings andregisters

11

The operation of the low-set current stage I0> ofthe earth-fault relay module is based on eitherdefinite time or inverse time characteristics. Themode of operation is selected with switch 3 ofswitchgroup SG1 (see page 7).

When the IDMT mode of operation is selected,the operate time of the low-set current stage I0>will be a function of the current; the higher thecurrent, the shorter the operate time. The rela-tionship between current and time complies withthe standards BS 142.1966 and IEC 60255-3and may generally be expressed as:

t = [s]

wheret = operate time in secondsk = time multiplierI = current valueI0> = set current value

The module includes four characteristics withdifferent degrees of inversity. The characteristicto be used is selected with switches 1 and 2 ofswitchgroup SG1 (see page 7).

The degree of inversity is determined by thevalues of the constants α and β:

Degree of inversity of α βthe characteristic

Normal inverse 0.02 0.14Very inverse 1.0 13.5Extremely inverse 2.0 80.0Long-time inverse 1.0 120.0

According to the standard BS 142.1966 a nor-mal current range is defined as 2...20 times thesetting. Additionally the relay must start at thelatest when the current exceeds a value of 1.3times the setting, when the time/current charac-teristic is normal inverse, very inverse or ex-tremely inverse. When the characteristic is long-time inverse, the normal range in accordancewith the standard is 2...7 times the setting andthe relay is to start when the current exceeds 1.1times the setting.

The following requirements with regard to op-erate time tolerances are specified in the stand-ard (E denotes accuracy in per cent, - not speci-fied):

Time/currentcharacteristic(modified 2002-05)

k x β I α

I0>( –1)

I/I> Normal inverse Very inverse Extremely inverse Long-time inverse

2 2.22 E 2.34 E 2.44 E 2.34 E5 1.13 E 1.26 E 1.48 E 1.26 E7 - - - 1.00 E

10 1.01 E 1.01 E 1.02 E -20 1.00 E 1.00 E 1.00 E -

In the normal current ranges above, the inverse-time stage of the non-directional earth-faultrelay module SPCJ 1C8 complies with the tol-erances of class 5 at all degrees of inversity.

The time/current characteristics specified in thestandards are illustrated in fig. 3 … 6.

Note.The actual operate time of the relay, presentedin the graphs in Fig. 3…6, includes an addi-tional filter and detection time plus the operatetime of the trip output relay. When the operatetime of the relay is calculated using the math-ematical expression above, these additional timesof about 30 ms in total have to be added to thetime received.

12

Fig. 3. Extremely inverse-time characteristic of earth-fault relay module SPCJ 1C8.

1 3 4 5 6 7 8 9 102 20 I/I>

0.05

0.1

0.2

0.3

0.4

0.6

0.8

1.0

k

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

30

40

70

60

50

t/s

13

1 2 3 4 5 6 7 8 9 10 20 I/I>

0.05

0.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91.0

k

0.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

70

60

50

40

30

t/s

Fig. 4. Very inverse-time characteristic of earth-fault relay module SPCJ 1C8.

14

Fig. 5. Normal inverse-time characteristic of earth-faullt relay module SPCJ 1C8.

0.05

0.1

0.2

0.3

0.4

0.5

0.60.70.80.91.0

k

1 2 3 4 5 7 8 9 10 20 I/I>60.02

0.03

0.04

0.05

0.06

0.070.080.090.1

0.2

0.3

0.4

0.5

0.6

0.7

0.80.9

1

2

3

4

5

6

789

10

20

30

40

50

60

70

t/s

15

Fig. 6. Long-time inverse-time characteristic of earth-fault relay module SPCJ 1C8.

1 2 3 4 5 10 206 7 8 9 I/I>

0.05

0.1

0.2

0.3

0.4

0.5

0.6

0.70.80.91.0

k

0.2

0.3

0.4

0.5

0.6

0.70.80.9

1

2

3

4

5

6

7

89

10

20

30

40

50

60

708090

100

200

300

400

500

600

700

t/s

16

Technical data Low-set current stage I0>Start current I0> 0.1...0.8 x InStart time, typically 60 msOperate time t> at definite time operation 0.05...1.00 s,

0.5...10.0 s or5...100 s

Operation characteristic at IDMTmode of operation Extremely inverse

Very inverseNormal inverseLong-time inverse

Time multiplier k 0.05...1.00Reset time, typically 60 msDrop-off/pick-up ratio, typically 0.96Operate time accuracy atdefinite time mode of operation ±2% of set value or ±25 msOperation time accuracy class E atinverse time mode of operation 5Operation accuracy ±3% of set value

High-set current stage I0>>Start current I0>> 0.5...4.0 x In & ∞, infinite or

0.1...0.8 x In & ∞, infiniteStart time, typically 50 msOperate time t>> 0.05...1.00 s,

0.5...10.0 s or5...100 s

Reset time, typically 60 msDrop-off/pick-up ratio, typically 0.96Operation time accuracy ±2% of set value or ±25 msOperation accuracy ±3% of set value

17

The event codes E1...E8 are represented by thenumbers 1, 2, 4...128. The event mask is formedby multiplying above numbers either with 0(event not included in reporting) or 1 (eventincluded in reporting) and adding up the num-bers received (compare calculation of checksum).

The event mask may have a value in the range0...255. The default value of the non-direc-tional earth-fault module SPCJ 1C8 is 85, whichmeans that all startings and trippings are in-cluded in the reporting, but not the resetting.The codes E50...E54 and the events representedby these cannot be excluded from the reporting.

Event codes of non-directional earth-fault mod-ule SPCJ 1C8:

Event codes The substation level control data communica-tor is able to read, over the SPA serial bus, theevent data of the module, e.g. starts and trip-pings, from the non-directional earth-fault relaymodule SPCJ 1C8. Event information calledfor are printed out in the format: time (ss.sss)and event code. The event codes of the moduleare E1...E8 and E50 and E51. Furthermore, thesubstation level control data communicator isable to form event codes relating to e.g. the datacommunication.

The codes E1...E8 and the events represented bythese can be included in or excluded from theevent reporting by writing an event mask (V155)to the module over the SPA bus. The event maskis a binary number coded to a decimal number.

Code Event Number Factory setrepresenting default valuethe event

E1 Starting of stage I0> 1 1E2 Starting of stage I0> reset 2 0E3 Tripping of stage I0> 4 1E4 Tripping of stage I0> reset 8 0E5 Starting of stage I0>> 16 1E6 Starting of stage I0>> reset 32 0E7 Tripping of stage I0>> 64 1E8 Tripping of stage I0>> reset 128 0E50 Restarting * -E51 Overflow of event register * -E52 Temporary disturbance in data communication * -E53 No response from the module over the data

communication * -E54 The module responds again over the data

communication * -

0 not included in the event reporting1 included in the event reporting* no code number- cannot be programmed

Note!The codes E52…E54 are formed by the sub-station level data communication equipment.

18

recorded in the memory (V data), and someother data. Further, part of the data can bealtered by commands given over the SPA bus.All the data are in channel 0.

Data to betransferredremotely

Apart from the event codes the substation levelcontrol data communicator is able to read, overthe SPA bus, all input data (I data), output data(O data) , setting values (S values), information

Data Code Data Valuesdirect.

Measured neutral current I1 R 0...21 x InBlocking of tripping of stage I0> I2 R 0 = no blocking

1 = tripping of stage I0>blocked

Blocking of tripping of stage I0>> I3 R 0 = no blocking1 = tripping of stage I0>>

blocked

Starting of stage I0> O1 R 0 = stage I0> not started1 = stage I0> started

Tripping of stage I0> O2 R 0 = stage I0> not tripped1 = stage I0> tripped

Starting of stage I0>> O3 R 0 = stage I0>> not started1 = stage I0>> started

Tripping of stage I0>> O4 R 0 = stage I0>> not tripped1 = stage I0>> tripped

Activated start value for stage I0> S1 R 0.1...0.8 x InActivated operate time for S2 R 0.05...100 sstage I0> or time multiplier k 0.05...1.00Activated starte value for stage I0>> S3 R 0.1...4 x In

999 = ∞, out of operationActivated operate time for stage I0>> S4 R 0.05...100 sActivated checksum of switchgroup SG1 S5 R 0...255

Start value for stage I0>, S11 R 0.1...0.8 x Inset with the setting knobOperate time for stage I0>, or time S12 R 0.05...100 smultiplier, set with the setting knob 0.05...1.00Start value for stage I0>>, S13 R 0.1...4 x Inset with the setting knob 999 = ∞, out of operationOperate time for stage I0>>, S14 R 0.05...100 sset with the setting knobChecksum of switchgroup SG1 S15 R 0...255(set with the switches)

Remote setting percentage of the S21 R, W 0...999 %start value for stage I0>Remote setting percentage of the S22 R, W 0...999 %operate time for stage I0>, or timemultiplier kRemote setting percentage of the S23 R, W 0...999 %start value for stage I0>>Remote setting percentage of S24 R, W 0...999 %operate time for stage I0>>Remotely set checksum S25 R, W 0...255of switchgroup SG1

19


Remotely set start current for stage I0> S31 R 0.1...0.8 x InRemote setting value for the operate time S32 R 0.05...100 sof stage I0>, or time multiplier k 0.05...1.00Remotely set start current for stage I0>> S33 R 0.1...4 x In

999 = ∞Remote setting value for the S34 R 0.05...100 soperat time of stage I0>>Remotely set checksum for S35 R 0...255switchgroup SG1

Max. measured current or V1 R 0...21 x Incurrent at trippingNumber of starts of stage I0> V2 R 0...255Number of starts of stage I0>> V3 R 0...255Duration of the latest start V4 R 0...100 %situation of stage I0>Duration of the latest start V5 R 0...100 %situation of stage I0>>

Resetting of output relays V101 W 1 = output relays and ope-and operation indicators ration indicators resetResetting of output relays, operation V102 W 1 = output relays, operationindicators and recorded data indicators and registerssimultaneously (codes V1…V5) reset

Remote control of settings V150 R, W 0 = setting with knobsS11...S15 activated

1 = remote settingsS31...S35 activated

Event mask word V155 R, W 0...255, see section"Event codes"

Manual reset or self-reset mode V156 R, W 0…15, see paragraphof operation for the indicators (SG2) "Selector switches"

Opening of password for remote settings V160 W 1...999Changing or closing of password V161 W 0...999for remote settings

Activation of self-supervision system V165 W 1 = self-supervision systemoutput is activated andIRF indicator lit in about5 seconds, whereafterthe self-supervision sys-tem resets and the IRFindicator is switched off

Internal fault code V169 R 0…255

Data communication address of V200 R 1...254the module

Program version symbol V205 R e.g. 065 A

20


Type designation of the module F R SPCJ 1C8

Event register reading L R Time, channel numberand event code

Re-reading of event register B R Time, channel numberand event code

Reading of module state data C R 0 = normal state1 = module been subject

to automatic reset2 = overflow of event register3 = events 1 and 2 together

Resetting of module state data C W 0 = resetting

Time reading and setting T R, W 00.000...59.999 s

R = data to be read from the unitW = data to be written to the unit

The data transfer codes L, B, C and T have beenreserved for the event data transfer between themodule and the station level control data com-municator.

The event register can be read by the L-com-mand only once. Should a fault occur e.g. in thedata transfer, it is possible, by using the B-command, to re-read the contents of the eventregister read by means of the L-command. Whenrequired, the B-command can be repeated.

The setting values S1...S5 are the setting valuesused by the protection programs. These valuesare set either remotely or by means of the settingknobs. The values S11...S15 are settings set withsetting knobs or switches. S21...S25 are knobsetting percentage factors to be set remotely.The settings S21...S25 allow reading or writing.

To be able to write the password (V160) for theremote setting must be opened and the poten-tionmeter settings must be activated (V150=0).The variables S31...S35 contain the remotesetting values.

When changing the remote setting percentagesS21...S24, these variables can be given a per-centage factor within the range 0...999. Then itis also possible to alter the setting value beyondthe limits specified in the technical data of themodule. However, the validity of the settingvalues are guaranteed only within the limitsspecified in the technical data.

Activation of the self-supervision input (V165)prevents the protection from operating as longas the self-supervision input is active and theIRF indicator is on.

21

Fault codes Shortly after the self-supervision system hasdetected a permanent internal fault the red IRFindicator is lit. Simultaneously the relay moduleputs forward a control signal to the output relayof the self-supervision system. In most faultsituations an autodiagnostic fault code appearson the display of the module. The fault codeconsists of a red number 1 (one), and a green,one to three digit code number. When a fault is

detected the fault code should be recorded forfurther use when the relay module is to berepaired.

Some of the fault codes that may appear on thedisplay of the non-directional earth-fault relaymodule SPCJ 1C8 are shown in the followinglist:

Fault code Type of fault

4 Output relay control circuit interrupted or output relay module missing30 Faulty Read Only Memory (ROM)50 Faulty Random Access Memory (RAM)

195 Too low a value on reference channel with multiplier 1131 Too low a value on reference channel with multiplier 5

67 Too low a value on reference channel with multiplier 25203 Too high a value on reference channel with multiplier 1139 Too high a value on reference channel with multiplier 5

75 Too high a value on reference channel with multiplier 25253 No interruptions from the A/D converter

L1 IRF

>I

L2I L3II

1309

[ ]sk

>t0.5

0.05 1.0

13

2.5

0.5

0.04 1.0

0.5

1.5

2.5

STEP

RESET

SG1

0 1

1234567820

STEP

>>I

nI>I

nI>>I

>>t [ ]s

>I >>I

SPCJ 3C3

B

Indicators for measured values

Setting knob 1with indicator

Stage 1



Stage 2


Self-supervision alarm indicator(Internal Relay Fault)

Display, 1 + 3 digits

Step push-button (STEP)

Programming switches SG1

Switchgroup indicator

Reset push-button (RESET)

Start/operation indicators

General characteristics ofC-type relay modules


2

General characteristics ofC-type relay modules

Contents Push-buttons .................................................................................................................. 2Programming switches SG1 ............................................................................................ 2Setting knobs .................................................................................................................. 3Display ........................................................................................................................... 3

Display main menu ................................................................................................... 3Display submenu ....................................................................................................... 4Setting mode ............................................................................................................. 4Example: Operation in setting mode ......................................................................... 5Stored information .................................................................................................... 6Trip-test mode........................................................................................................... 7Example: Trip-test function ...................................................................................... 8

Operation indicators ....................................................................................................... 9Fault codes ...................................................................................................................... 9

Push-buttons The front panel of the relay module containstwo push-buttons. The STEP button is used forstepping forward in the display and the RESETbutton for resetting the red indicators. Addi-tionally, the push-buttons are used for certain

settings, e.g. for setting the address of the relaymodule and the data transfer rate for the serialcommunication when the modules are used inrelay packages provided with this quality. (Seesection Display).

Programmingswitches SG1

Part of the settings and the selections of theoperating characteristics for the relay modulesin various applications are made with the pro-gramming switches SG1 on the front panel. Theindicator of the switchgroup glows when the

checksum of the switchgroup is shown on thedisplay. The checksum can be used for checkingthat the switches are properly set. Fig. 2 gives anexample of calculating the checksum.

Fig. 2. Example of calculating the checksum of programming switchgroup SG1.

When the checksum calculated according to theexample is equal to the checksum indicated onthe display of the relay module, the switches areproperly set.

The function of the programming switches ofthe individual measuring relay modules is speci-fied in the description of the module concerned.

1MRS 750328-MUM EN

Issued 96-02-19Version A (replaces 34 SPC 2 EN1)Checked L-W UApproved TK


3

Setting knobs Most of the operating values and operatingtimes are set by means of the setting knobs onthe front panel of the relay module. Each settingknob has its own (LED) indicator which glowswhen the concerned setting value is shown onthe display.

If a setting knob is turned while the display isshowing another measured or set value, thevalue being set automatically appears on thedisplay. Simultaneously, the indicator for theconcerned setting starts glowing.

In addition to the settings made with the settingknobs, most modules allow so called remotesetting. This means that the settings made bymeans of the setting knobs of the module andthe checksum of the programming switchgroupmay be altered through an instruction over theserial communication bus. Remote setting ispossible if the password in the register A isknown, and the remote settings are not acti-vated, i.e. parameter V150=0. The circumstancethat the remote settings are activated is shownwith a flashing light of the indicator of thesetting knob, the value of which currently isbeing displayed.

Display The measured and set values as well as the datarecorded are shown on the display of the meas-uring relay module. The display consists of fourdigits. The three digits (green) to the rightindicate the measured, set or stored value andthe digit at the extreme left (red) the number ofthe register. The measured or set value displayedis indicated by a yellow LED indicator. Thenumber of the register glows only when a storedvalue is displayed.

When the auxiliary voltage is connected to ameasuring relay module, the module initiallytests the display by stepping through the digits1...9 for about 15 seconds. When the test isfinished the display turns dark. The testing canbe interrupted by pressing the STEP button.The protective functions of the module areoperative throughout the testing.

Display main menu All the data required during normal operatingconditions are accessible from the main menuwhich presents the measured values in real-time,the normal setting knob settings as well as themost important memorized data.

The data to be shown in the main menu areselected to the display in a certain sequence bymeans of the STEP button. When pressing theSTEP button for about one second, the displaymoves forward in the display sequence. Whenpressing it for about 0.5 seconds, the displaymoves backwards in the display sequence.

From a dark display only forward movement ispossible. When keeping the STEP button de-pressed, the display is continuously moving inforward direction stopping for a while at thedark point.

Unless the display is switched off by stepping tothe dark point, it remains activated for about 5minutes from the last pressing of the STEPbutton and then goes out.

4

Display submenu Less important values and values not very oftenset are displayed in the submenus. The numberof submenus varies with different relay moduletypes. The submenus are presented in the de-scription of the concerned module.

A submenu is entered from the main menu bypressing the RESET button for about one sec-ond. When the button thereafter is released, thered digit (STEP) of the display starts flashing,indicating that one is in a submenu. Going fromone submenu to another or back to the mainmenu follows the same principle as when mov-ing from the main menu display to another; the

display moves forward when pressing the STEPbutton for one second and backward whenpressing it for 0.5 seconds. The return to themain menu has taken place when the red STEPdisplay turns dark.

When entering a submenu from a measured orset value indicated by a LED indicator, theindicator remains glowing and the address win-dow (STEP) of the display starts flashing. Aflashing address window when no LED indica-tor is lit indicates that the submenu of a registerhas been entered.

Fig. 3. Example of the main and submenus for the settings of the overcurrent relay module SPCJ3C3. The settings made with the setting knobs are in the main menu and they are displayed bypressing the STEP button. In addition to the setting knob settings the main menu contains themeasured current values as well as the registers 1…5, as well as 0 and A. The remote settingpercentage and remote setting value are located in the submenus for the settings and are activatedon the display by pressing the RESET button.

Setting mode The registers of the main menu and the submenusalso contain parameters to be set. The settingsare made in the so called setting mode, which isaccessible from the main menu or a submenu bypressing the RESET button, until the digit atthe extreme right starts flashing (about 10 s).The flashing digit is set by means of the STEPbutton. The flashing is moved on from digit todigit by pressing the RESET button.

A set value is stored in the memory by pressingthe push-buttons STEP and RESET simultane-ously. In practice the RESET button must be

pressed slightly in excess of the STEP button.Return from the setting mode to the main menuor submenu is possible by pressing (for about 10s) the RESET button until the green digits onthe display stop flashing. If the module is left inthe setting mode, it will return automatically tothe start condition after about 5 minutes.

The values to be set in the setting mode are forinstance the address code of the relay moduleand the data transfer rate for the serial commu-nication. Further the percentage values for theremote settings can be changed.

5

Example 1: Function in the setting mode. Manual setting ofthe address code of a relay module and the datatransfer rate for the serial communication. Theinitial value for the address code is 146.

a)Press push-button STEP until register address Aappears on the display.

b)Press the RESET button for about 10 s until theright most digit starts flashing.

c)Press the STEP button repeatedly to set the digitto the value desired.

d)Press the RESET button to make the middle ofthe green digits flash.

e)Set the middle address digit by means of theSTEP button.

f)Press the RESET button to make the left mostgreen digit flash.

g)Set the digit by means of the STEP button.

h)Store the set address number in the memory ofthe relay module by pressing the RESET andSTEP button simultaneously. At the momentthe information enters the memory, the threegreen dashes flash in the display, i.e. A—.

i)Leave the setting mode by pressing the RESETbutton for about 10 s, until the display stopsflashing.

j)Then enter submenu 1 of register A by pressingthe RESET button for approx. one second. Theregister address A is then replaced by a flashing1. This submenu is used for setting the datatransfer rate of the serial communication.

k)The data transfer rate for the serial communica-tion is set and stored in the same way as theaddress, see sections b...i, except that the con-tinuously glowing register address has been re-placed by a flashing 1.

l)After storing the data transfer rate for the serialcommunication you may return to the mainmenu of register A by pressing the STEP buttonfor about 0.5 second.

6

Stored information The parameter values measured at the momentwhen a fault occurs are recorded in the registers,in some modules also the setting values. Therecorded data, except for some setting param-eters, are set to zero by pressing the push-buttons STEP and RESET simul-taneously.The data in normal registers are erased if theauxiliary voltage supply to the relay is disrupted,only the set values and the number ofautoreclosings are maintained in the registers ata voltage failure.

The number of the registers varies with differentmodule types. The function of the registers areillustrated in the descriptions of the separaterelay modules. Additionally, the system panelcontains a simplified list of the data recorded bythe various relay modules of the relay assembly.

All C-type relay modules are provided with twogeneral registers: register 0 and register A.

Register 0 contains, in coded form, the informa-tion about e.g. external blocking signals andstatus information for the circuit breaker. Thecodes are explained in the descriptions of therelay modules.

Register A contains the address code of the relaymodule as required by the serial communicationsystem. Example 1 on page 4 shows how theaddress code is altered. Submenu 1 of register Acontains the data transfer rate value expressed inkilobaud for the serial communication.

Submenu 2 of register A contains a bus trafficmonitor for the SPACOM system. If the protec-tive relay, which contains the relay module, islinked to a system including the control datacommunicator and the data communicationsystem is operating, the counter reading of themonitor will be zero. Otherwise the digits 1...255are continuously rolling in the monitor.

Submenu 3 contains the password required forchanging the remote settings. The address code,the data transfer rate for the serial communica-tion and the password can be set manually or viathe serial communication bus. For manual set-ting see example 1.

The start value for the address code and thepassword is 001 and that for the data transferrate 9.6 kilobaud.

7

Trip-test mode Register 0 also allows access to the so calledTrip-test function, which allows the outputsignals of the relay module to be activated one byone. If the auxiliary relay module of the protec-tion assembly is in place, the auxiliary relays willbe included in the testing.

When pressing the RESET button for about 10seconds, the three green digits to the right startflashing to indicate that the relay module is intest position. The indicators of the setting knobsindicate by flashing which output signal can beactivated. The required output function is se-lected by pressing the RESET button for about1 second, until the following LED indicatorstarts flashing.

The indicators of the setting knobs refer to thefollowing output signals:Setting knob 1 SS1 Starting of stage 1Setting knob 2 TS1 Tripping of stage 1Setting knob 3 SS2 Starting of stage 2Setting knob 4 TS2 Tripping of stage 2No indication IRF Self-supervision

The selected starting or tripping is activated bysimultaneous pressing of the push-buttons STEPand RESET. The signal remains activated aslong as the two push-buttons are being pressed.

The self-supervision output is activated by press-ing the STEP button once when no setting knobindicator is flashing. The IRF output is acti-vated in about 5 seconds after pressing of theSTEP button, and resets after that. Simultane-ously, the display returns to the main menu andperforms the initial testing indicated by rollingdigits 0...9 in the display several times.

The signals are selected in the order illustrated infig. 4.

REGISTER 0IRF SS1 TS1 SS2 TS2

STEP STEP+RESET

STEP+RESET

STEP+RESET

STEP+RESET

RESET10 s

RESET1 s

RESET1 s

RESET1 s

RESET1 s

RESET1 s

Fig. 4. Sequence order for selecting the output signals in the Trip-test mode.

If e.g. the indicator of the setting knob 2 (secondfrom the top) is flashing, and the push-buttonsSTEP and RESET are being pressed, the signalTS1 (tripping of stage 1) is activated. Return tothe main menu is possible at any stage of the

Trip-test sequence scheme, by pressing theRESET button for about 10 seconds. If themodule is left in the Trip-test mode, it willreturn automatically after approx. 5 minutes.

8

Example 2: Trip-test function. Forced activation of the out-puts is made as follows:

a)Step forward on the display to register 0.

b)Press the RESET button for about 10 secondsuntil the three green digits to the right and theLED indicator of the uppermost setting knobstart flashing.

c)Press the push-buttons RESET and STEP si-multaneously. Then the starting of stage 1 (e.g.the I>-stage of the overcurrent module SPCJ3C3) is activated and, simultaneously, the indi-cator of the stage starts glowing yellow.

d)Press the RESET button for about 1 seconduntil the indicator of the second setting knobstarts flashing.

e)Press the push-buttons RESET and STEP si-multaneously to activate tripping of stage 1 (e.g.the I>-stage of the overcurrent module SPCJ3C3). The indicator of the concerned stagestarts glowing red.

f)Starting and tripping of the second stage isactivated in the same way as stage 1. The indica-tor of the third or fourth setting starts flashing toindicate that the concerned stage has been acti-vated.

g)To activate the self-supervision output step to-wards the test position, where no indicator isflashing. Press the STEP button once. In about5 seconds the red IRF indicator starts glowingand the IRF output is activated. Shortly thereaf-ter the indicator goes out and the output auto-matically resets. At the same time the moduleleaves the test position.

h)It is possible to leave the trip test mode at anystep of the sequence scheme by pressing theRESET button for about 10 seconds until thethree digits to the right stop flashing.

9

Operationindicators

A measuring relay module is provided with twoseparate operating stages, each of which with itsown yellow/red operation indicator on the lowerpart of the front plate of the relay module.

The operation indicator starts glowing yellowwhen the operating stage starts and red when adelayed tripping operates. The functions of thestart and operation indicators are described indetail in the different protection relay modulemanuals.

Fault codes In addition to the protective functions the relaymodule is provided with a self-supervision sys-tem which continuously supervises the functionof the microprocessor, its program executionand the electronics.

When the self-supervision system has detected apermanent fault in the relay module, the redIRF indicator on the panel starts glowing soonafter the fault was discovered. At the same timethe module puts forward a signal to the self-supervision contact of the relay assembly.

In most fault situations a fault code, indicatingthe nature of the fault, appears on the display ofthe module. The fault code, which consists of ared digit (1) and a three digit green code number,cannot be removed from the display by reset-ting. When a fault occurs, the fault code shouldbe recorded and stated when service is ordered.

1MR

S 7

5080

1-M

UM

E

N

ABB OySubstation AutomationP.O.Box 699FIN-65101 VAASAFinlandTel. +358 (0)10 22 11Fax.+358 (0)10 22 41094www.abb.com/substationautomation

spaj 110 c earth-fault relay

Documents