low voltage switchgearliterature.puertoricosupplier.com/017/ao16673.pdf · 13 switchgear siemens...

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Siemens Power Distribution & Control, SPEEDFAX™ 2007-2008 Product Catalog13-42

For more information, please visit http://automation.usa.siemens.com/consultant/ or contact your local sales office.

Siemens Type WL low voltage metal-enclosed switchgear is designed,constructed and tested to providesuperior power distribution, powermonitoring and control. At the heart of theType WL low voltage switchgear is theWorld Class Siemens WL breaker.

Siemens Type WL low voltage switchgearcan be utilized in the followingapplications:

▪ Industrial

▪ Institutional

▪ Critical Power

▪ Utility and co-generation

▪ Commercial

Product Scope

▪ Equipment ratings635VAC Maximum3-Phase 3-Wire,3-Phase 4-Wire50/60 Hz6000 amp maximum horizontal bus5000 amp maximum vertical bus

▪ Enclosure optionsNEMA 1 IndoorNEMA 3R Outdoor Walk-inNEMA 3R Outdoor Non Walk-in

Exclusive FeaturesGenerator/Utility Protection Sets24/7/365 power availability is critical forsome systems. On-site generationcapability is growing more and morecommon in many systems. All of the WLdigital electronic trip units allow thesystem designer to precisely tailor tripsettings for the most demandingrequirements. However, the 755 and 776trip units allow one set of trip settings fora fully loaded utility feed and with asimple contact closure, the trip unittoggles to a second trip set tailored toprovide optimal generator protection. Thewide range of settings allows the WL toprovide protection for a minimalgenerator capacity for only essentialloads, through full backup for an entirefacility. This dual utility/generatorprotection capability in a single circuitbreaker allows the system designerunparalleled, costeffective flexibility.

Extended Instantaneous Protection(EIP – Patent Pending Feature)

Another unique feature of the WL TripUnit, allows the system designer toachieve full selective trip coordination upto the short-time rating of the frame,while also allowing application of thebreaker up to the interrupting rating ofthe frame. EIP allows the WL breaker tobe applied up to the full withstand ratingof the breaker, for complete coordination,with a minus 0% short- time bandtolerance up to 85kA on Frame Size IIand 100kA on Frame Size III. Above faultcurrents of 20% higher than the fullshort-time rating, the WL breaker is selfprotecting, and the EIP function will tripthe breaker instantly to protect the frameand the system from these extremelyhigh currents, as high as 150 kA onFrame Size III. One added benefit is thatarc flash energy is greatly reduced in thishigh current region due to theinstantaneous trip response that EIPprovides.

Industry StandardsType WL switchgear with power circuitbreakers are designed, tested andconstructed in accordance with:

▪ UL 1558—Metal-Enclosed Low VoltagePower Circuit Breaker Switchgear

▪ ANSI C37.20.1—Metal-Enclosed LowVoltage Power Circuit BreakerSwitchgear

WL drawout circuit breakers are designedfor continuous operation at 100% of theircurrent rating without the need forexternal heat sinks, and are in accordancewith:

▪ UL 1066—Low Voltage AC and DCPower Circuit Breakers Used inEnclosures

▪ ANSI C37.13—Low Voltage AC PowerCircuit Breakers Used in Enclosures

Siemens / Speedfax Previous folio: 13-55

Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear General

Type WL Low Voltage Metal-Enclosed Switchgear

Sect_13_Speedfax2007 4/16/07 12:29 PM 3-42

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Siemens Power Distribution & Control, SPEEDFAX™ 2007-2008 Product Catalog 13-43

Frame Size IIIFrame Rating 3200 4000 5000Rating Designation M F H L M F H L M F

Interrupting Current Ics 254VAC 150 200 85 100 150 200 85 100 150 200

(kAIR RMS) 50/60 Hz 508VAC 150 200 85 100 150 200 85 100 150 200

635VAC 85 200 85 85 85 200 85 85 85 200

Short-time Withstand

Current lcw

(kA RMS) 50/60 Hz 0.5s 100�

40 85 100�

100�

40 85 100�

100�

40

Extended Instantaneous 254VAC

Protection 508VAC 150 200 85 100 150 200 85 100 150 200

(kA RMS - 0% to 20+%) 635VAC 85 200 85 85 85 200 85 85 85 200

Close & Latch Ratings

(kA RMS) 50/60 Hz 100�

40 85 100�

100�

40 85 100�

100�

40

Rating Plug Range 800A to 3200A 800A to 4000A 800A to 5000A

Endurance Rating

(switching operations Mech. 10,000 10,000 10,000

with maintenance)�

Elec. 10,000 10,000 10,000


Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear Specifications

▪ Control and communication termination area located in frontof equipment and segregated from power cable terminationarea that is located in rear of equipment

▪ Front accessible vertical and horizontal wiring channels

▪ Easy access to control and communication connectionsthrough separate front door

▪ No heat sinks on breaker or bus

▪ No front-breaker door ventilation

▪ 100kA bus bracing standard - 150kA and 200kA optional

▪ Insulated/isolated bus through 6000 amps

▪ Three levels of horizontal bus through 5000 amps

▪ Modular design for maximum configuration flexibility

▪ Breaker racking handle integral to the breaker

▪ All breaker settings and displays clearly visible with breakerdoor closed

▪ Field installable “drop in place” accessories and trip units

▪ Same accessories work for entire breaker line

▪ ModBus, ProfiBus and Ethernet communication

▪ Field installable ground fault protection and zone selectiveinterlock

▪ Rogowski coil current sensors provide high metering accuracyand prevent saturation at high current levels

▪ Dynamic Arc Flash Sentry (DAS) and EIP (ExtendedInstantaneous Protection) are patent pending features fromSiemens that greatly reduce Arc Flash Energy

WL Low Voltage Metal-Enclosed Switchgear Features & Benefits

�Maintenance means: Replacing main contacts and arc chutes (see operating instructions).Main contacts in breakers with Rating Designation M can only be replaced by Siemenspersonnel.

�Do not apply breaker at 635V AC on a system with available fault current > 85kA RMS.

Frame Size IIFrame Rating 800 1600 2000 3200Rating Designation N S H L F N S H L F S H L F S H L

Interrupting Current Ics 254VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100

(kAIR RMS) 50/60 Hz 508VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100

635VAC 50 65 65 85 200 50 65 65 85 200 65 65 85 200 65 65 85

Short-time Withstand

Current lcw

(kA RMS) 50/60 Hz 0.5s 50 65 65 85 20 50 65 65 85 20 65 65 85 20 65 65 85

Extended Instantaneous 285-

Protection 508VAC 50 65 85 100 200 50 65 85 100 200 65 85 100 200 65 85 100

(kA RMS - 0% to 20+%) 635VAC 50 65 65 85 200 50 65 65 85 200 65 65 85 200 65 65 85

Close & Latch Ratings

(kA RMS) 50/60 Hz 50 65 65 85 75 50 65 65 85 75 65 65 85 75 65 65 85

Rating Plug Range 200A to 800A 200A to 1600A 200A to 2000A 200A to 3200A

Endurance Rating

(switching operations Mech. 15,000 15,000 15,000 15,000

with maintenance)�

Elec. 15,000 15,000 15,000 15,000

Breaker Ratings

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Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear GeneralMain and Ground BusThe standard main bus is silver-platedcopper. Tin-plated copper bus is option-ally available. Vertical and horizontal bus bar utilize a channel shape design to maximize short circuit withstand capability and minimize heat rise. All bus joints include Grade 5 bolts and conical spring washers. Provisions for future extension of the main bus include plated joints and high tensilestrength steel hardware.

The main three phase horizontal bus is arranged vertically one phase above the other with edge-to-edge alignment to provide high, short circuit strength.Insulated main bus with isolated verticalbus is optional.

Vertical bus ratings available are 1600,2000, 3200, 4000 and 5000 amperescontinuous current. Horizontal bus ratings available are 1600, 2000, 3200,4000, 5000 and 6000 amperes. A neutralbus is furnished when specified, and canbe rated 1600, 2000, 3200, 4000, 5000or 6000 amperes continuous current.

A standard copper ground bus extendsthrough all sections. Cable lugs aremounted to the ground bus in each section.

Standard short-circuit withstand (4 cycle)and short-time withstand (60 cycle) busbracing is 100,000 amperes. Higher short-circuit withstand bus bracings (150kA and200kA) are available.

Load side runbacks for feeder circuits are copper construction, are insulatedwith sleeve tubing in the main bus area,and are supported by high-strength bus bracing.

Control and Communication WiringStandard control and communicationwiring is #14 AWG extra-flexible, strandedcopper type SIS. Terminations are madewith compression-type, insulatedterminals. Control and communicationwiring is installed and accessed from thefront of the switchgear structure. Eachbreaker compartment has a dedicatedhorizontal and vertical wireway.

For devices not having screw-typeterminals, pressure terminals are used.

InsulationThe insulation used is a UL recognizedthermoset material that has excellent heatresistance, flame retardance, dimensionalstability and low moisture absorption.

Circuit Breaker CompartmentsTypical circuit breaker compartmentsinclude primary disconnects, drawoutrails, secondary disconnects, vertical wireway, horizontal wireway and, if applicable, TOC switch operator, MOCswitch operator and associated inter-locks. Drawout rails allow the breaker to be withdrawn from the compartmentwithout additional extensions or adapters.Up to six (2 sets of three) currenttransformers for metering or relaying canbe mounted in each compartment.

A separate secondary disconnect accessdoor that is supplied with each breakercan be used to mount a variety of auxiliarydevices such as breaker control switches,indicating lights and pushbuttons.

TOC Switch OperatorBreaker Compartment Rear BarrierSecondary DisconnectVertical Wireway

Interference InterlockDrawout RailsPrimary Disconnect

Circuit Breaker Cell Interior

4321

765

1

2

3

5

6

7

4


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Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear GeneralOptionsSiemens High Resistance GroundingSystem(1) The HRG section can be 22" or 32"

wide. The HRG instrumentcompartment is 45" high and either19" or 24" deep depending onwhether the circuit breakers are fused.The HRG instrument compartmentwill house all of the high resistancegrounding system components eitheron the door or in the device bucketexcept for the grounding resistors.

(2) The grounding resistor assembly willmount in the rear cable compartmentof the switchgear on the runbacksupport posts. It will typically mountbehind the HRG instrumentcompartment where it cannotinterfere with feeder breakerrunbacks.

(3) In a typical Siemens HRG applicationwith a close coupled main breakersection, a general purpose instrumentcompartment takes up the Acompartment, the main breaker goesin the B compartment and the HRGinstrument compartment takes up theC & D compartments. An alternateHRG main breaker section can havethe HRG instrument compartment inthe A & B compartments, mainbreaker in the C compartment and ageneral instrument compartment inthe D compartment.

Switchgear Mounted HoistThe integrally mounted hoist, standard on walk-in outdoor and optional on indoor switchgear enclosures, travelsalong rails on top of the switchgear toassist in breaker handling.TOC and MOC SwitchesThe Truck Operated Cell (TOC) Switchprovides interlocking control or remoteindication of the breaker rackingposition. The cubicle mounted auxiliaryswitch or Mechanism Operated Cell(MOC) switch provides interlockingcontrol or remote indication based onthe main contact position (open orclosed).ShuttersThese provide protection against acci-dental contact with primary disconnects in a compartment when the breaker isremoved. Shutters automatically closewhen the breaker is withdrawn and arepadlockable and field installable.Key InterlockThis provides a mechanical means foroperating circuit breakers and otherdevices only when predescribed con-ditions are met.

Test SetA portable breaker test set is available asan option and supports testing the fullrange of functions and protectivesettings supplied with the breaker tripunit.Metering and Auxiliary CompartmentsCompartments are available to housedevices such as voltage transformers,metering, control power transformers,and supervisory devices.Instrument and Control Transformers Voltage transformers and control powertransformers are mounted in auxiliarycompartments. These transformers are protected by primary pull-out type current-limiting fuses and secondaryfuses. Current transformers are normallymounted on the compartment primarydisconnect studs where they are readilyaccessible. Miscellaneous

▪ Each switchgear lineup includes a breaker lifting device that is adjust-able for use with Size II and Size IIIbreakers

▪ An optional portable breaker hoist isavailable if the integrated breaker hoistand track is not specified

▪ A test cabinet is also available as anoption. The test cabinet is wall mountednecessary equipment for testing electrically-operated breakers that have been removed from the breakercompartment. The test cabinet doesn'tinclude or replace a breaker trip unittester

▪ 4" high formed steel channel sills are available for indoor switchgearenclosures

Outdoor SwitchgearType WL switchgear is available in twooutdoor (NEMA 3R) enclosures. Walk-inand non walk-in versions are available to meet your particular application.For protection from snow, rain and other foreign matter, both outdoor enclosures rest on a six-inch high, formed steel base which provides rigid support and a tight bottom seal. A heavy duty protective under-coating is applied to the underside of all outdoor enclosures to protectagainst moisture and corrosion. Shielded ventilation housings permitproper air circulation while excluding dirt and foreign matter.

In the walk-in outdoor enclosure a lighted, unobstructed service aisle is provided at the front of the switchgearallowing inspection and maintenance

without exposure to the elements.An access door equipped with an emergency bar release is located at each end of the aisle. The following features are standard with walk-in outdoor enclosures.(1) Space heaters in breaker compart-

ment and bus compartment.(2) Screens and filters for exterior

door ventilation louvers.(3) Incandescent lighting receptacle

with three-way switch at each aisle access door.

(4) Duplex receptacle with ground fault protection at each aisle access door.

(5) Load center for power distribution to lights, receptacles, switches and heaters.

For non walk-in outdoor enclosures,space heaters and screens/filters for ventilation louvering are standard with lighting, receptacles, switches and load centers offered as options.

Side View

Rear View


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Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear Dimensions

�

1.25(32) typ.

1.50(38)

.86(22)

.86(22)

4.42 (112).75 (19) typ.

.75 (19) typ.

5.86(149) 7.88

(200)�

Maximum availablespace in top or bottomof unit for customer's

power cables

TransformerThroat

Liquid filled &outdoor dry typetransformers only

(4) Holes for .50 (12mm)Grade 5anchor bolts

CL

B

End Trim Panel (typ.)Required on left andright end of switchgearlineup — adds 2”to total lineup width

A

14.9(378)

D

Space forsecondaryleads fromabove

Space forsecondaryleads frombelow

5.00(127) 2.12

(54)

3.00 (76)

2.00 (51)

7.00(179)

2.37 (60)

1.00 (25)

�

WW = 22 (559) or 32 (813)

2.00 (51)1.00 (25)

4.40 (112)

C

4.00(102)

�

4.00(102)

4.82(122)

1.00(25)

Indoor Front Elevation View Indoor Floor Plan and Cable Space Details

Equipment Depth Direction of Cables

60" Non-Fused with(N, S, H or L-Rating Breakers)

Below 21.50 (546) � �13.88 (353) 32.59 (828)

OR65" Fused with (F-Rating Breakers)

Above 21.25 (540) � 18.88 (480) 37.59 (955)

70" Non-fused with(N, S, H or L-Rating Breakers)

Below 31.50 (800) � � 13.88 (353) 32.59 (828)

OR75" Fused with (F-Rating Breakers) Above 31.25 (794) � 18.88 (480) 37.59 (955)

80" Non-fused with Below 41.50 (1054) � �13.88 (353) 32.59 (828)

(N, S, H or L-Rating Breakers) Above 41.25 (1048) �

80" Fused with Below 36.50 (927) � �18.88 (480) 37.59 (955)

(F-Rating Breakers) Above 36.25 (921) �

A B C D

Note: Dimensions shown in inches and (mm).� Reduce by 7.88" if upper neutral is present with cables above or if a lower neutral is present with cables below.� Reduce by 4.00" if an 800-3200A breaker is located in the bottom compartment.

Reductions per notes 1 & 2 are additive. Example: cables below + lower neutral + 2000A breaker in bottom compartment = B-11.88.� Reduce cable space by 4.00" x 4.82" if Neutral Riser is present. (Consult Factory).� 4.10 (104) if W=22; 4.60 (117) if W=32.


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Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear SelectionGeneral Notes:

▪ A blank/instrument compartment can always besubstituted for a breaker compartment

▪ Any 22" wide section can be 32" wide if moreconduit working room is needed

▪ For bus duct connections – if incoming is top,Compartment A must be blank/instrument, ifincoming is bottom, Com-partment D must beblank/instrument

▪ Bused transition section is 22" wide

▪ For close coupled transformer connections,Compartment A must be blank/instrument

▪ Utility metering is always in a separatesection. Section width is dependent on utility

Switchgear Depth Dimensional Information(Dimensions below are for internal frames – nottotal structure depth)

▪ Non-fused indoor – 60" standard, 70" and 80"optional

▪ Fused indoor – 65" standard, 75" and 80"optional

▪ Non-fused non-walk-in outdoor – 60" standardand 75" optional

▪ Fused non-walk-in outdoor – 65" standard and75" optional

▪ Non-fused walk-in outdoor – 60" standard and75" optional

▪ Fused walk-in outdoor – 65" standard and 75"optional

▪ Walk-in outdoor aisle is 42" deep

▪ Sections with cable connected main, tie and/orfeeder breakers that are 3200 amp or greatermust be minimum depth of 70" for unfusedbreakers and 75" for fused breakers.

Blank orInstrument

Compartment

Main Breaker800, 1600,2000, 3200

Feeder Breaker800, 1600,2000, 3200

Feeder Breaker800, 1600,

2000

22 in.(559 mm)

Blank orInstrument

Compartment

Main Breaker800, 1600,2000, 3200

Feeder Breaker800, 1600,2000, 3200


2000

22 in.(559 mm)

Blank orInstrument

Compartment

Main Breaker800, 1600,2000, 3200


2000

Blank orInstrument

Compartment

22 in.(559 mm)

Blank orInstrument

Compartment

Main Breaker4000, 5000

Feeder Breaker800, 1600, 2000,

3200, 4000Refer to Note 1

Feeder Breaker800, 1600, 2000

Refer to Note 1

32 in.(813 mm)

Blank orInstrument

Compartment

Main Breaker4000, 5000

32 in.(813 mm)


Blank orInstrument

Compartment

Refer to Note 6

Main Sections – Non-Fused Breakers

Blank orInstrument

Compartment

Main Breaker800, 1600,

2000


2000


2000

22 in.(559 mm)

Blank orInstrument

Compartment


2000


2000

Blank orInstrument

Compartment

22 in.(559 mm)

Blank or Instrument

Compartment

Main Breaker 3200, 4000

Feeder Breaker 800, 1600, 2000

32 in. (813 mm)

Blank or Instrument

Compartment

Main Breaker5000

32 in. (813 mm)

Main Sections – Fused Breakers

Note 1 – If a 4000 amp feeder breaker is installedin Compartment C, Compartment D must be aBlank or Instrument Compartment.Note 2 – If a 4000 amp breaker is installed inCompartment B, Compartment A must be a Blankor Instrument Compartment.Note 3 – Contact factory for applicationguidelines related to this design.Note 4 – If a 3200 amp breaker is installed inCompartment B, the middle level through bus isnot available.Note 5 – If a 3200 amp breaker is installed inCompartment D, the lower level through bus isnot available.Note 6 – If incoming is bottom, feeder breakerscan mount in compartments A and/or B.Note 7 – If a 3200 amp breaker is installed inCompartment B, Feeder Breaker in CompartmentA is limited to 1600 amp.Note 8 – If a 3200 amp breaker is inCompartment BC, the maximum breaker inCompartment A is 1600 amp and if a 4000 ampbreaker is in Compartment BC, the maximumbreaker in Compartment A is 800 amp.

ACompartment

BCompartment

CCompartment

DCompartment

Section Compartment Arrangement


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Low Voltage SwitchgearType WL Low Voltage Metal-Enclosed Switchgear Selection

Feeder Breaker800, 1600,2000, 3200Refer to Note 4

Feeder Breaker800, 1600,2000, 3200

Feeder Breaker800, 1600,2000, 3200

Refer to Note 5

22 in.(559 mm)


2000


2000

Feeder Breaker4000, 5000

32 in.(813 mm)

Blank orInstrument

Compartment


2000

Feeder Breaker4000

32 in.(813 mm)

Blank orInstrument

Compartment


Blank orInstrument

Compartment

Feeder Breaker800, 1600,2000, 3200

32 in.(813 mm)


Blank

Feeder Breaker800, 1600,2000, 3200

Refer to Note 5

Feeder Sections – Non-Fused Breakers


2000


2000


2000

22 in.(559 mm)


2000


Feeder Breaker3200

32 in. (813 mm)


2000

Blank or Instrument

Compartment

Feeder Breaker4000

32 in. (813 mm)


2000

Blank or Instrument

Compartment

Feeder Breaker5000

32 in. (813 mm)

Feeder Sections – Fused Breakers

Tie Breaker800, 1600,

2000


2000


2000


2000

22 in.(559 mm)


2000


2000


2000


2000

22 in.(559 mm)

Tie Breaker 3200, 4000

Feeder Breaker 800, 1600,

2000

32 in. (813 mm)


Refer to Note 8

Tie Breaker

5000

32 in. (813 mm)

Blank or Instrument

Compartment

Tie Sections – Fused Breakers

Blank orInstrument

Compartment

Main Breaker800, 1600,2000, 3200

Tie Breaker800, 1600,2000, 3200


2000

22 in.(559 mm)

Main Breaker800, 1600,2000, 3200

Tie Breaker800, 1600,2000, 3200


2000

22 in.(559 mm)


2000Refer to Note 7

Blank orInstrument

Compartment


2000


2000


2000

22 in.(559 mm)

Feeder Breaker800

Main Breaker4000

Tie Breaker 4000


2000

32 in.(813 mm)

Main Breaker

4000

Tie Breaker 4000


2000

32 in.(813 mm)

Feeder Breaker800

Main and Tie Sections – Non-Fused Breakers


2000


2000


2000

22 in.(559 mm)


2000


2000


2000


2000

22 in.(559 mm)


2000

Main and Tie Sections – Fused Breakers

Tie Breaker800, 1600,2000, 3200

Feeder Breaker800, 1600,2000, 3200


2000


2000Refer to Note 7

22 in.(559 mm)

Tie Breaker800, 1600,2000, 3200


2000


2000


2000

22 in.(559 mm)

Tie Breaker4000


3200, 4000Refer to Note 1


Refer to Note 1

32 in.(813 mm)


Tie Breaker4000, 5000



3200, 4000 Refer to Note 2

and Note 4

32 in.(813 mm)


Refer to Note 2

Tie Sections – Non-Fused Breakers

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Low Voltage SwitchgearType WL Circuit Breakers GeneralRogowski Coil CT TechnologyA Rogowski coil is an ‘air-core’ toroidalcoil placed round the conductor. Thealternating magnetic field produced bythe current induces a voltage in the coilwhich is proportional to the rate ofchange of current.

The direct output from the coil is givenby Vout=M dI/dt Where M is the mutualinductance of the coil and dI/dt is therate of change of current. To completethe transducer the voltage is integratedelectronically so that the output from theintegrator is a voltage that accuratelyreproduces the current waveform.

Coil and Integrator:The combination of a coil and anintegrator provides an exceptionallyversatile current-measuring systemwhich can be designed to accommodatea vast range of frequencies, currentlevels and conductor sizes. The output isindependent of frequency, has anaccurate phase response and canmeasure complex current waveformsand transients.

Linearity:One of the most important properties ofa Rogowski coil measuring system isthat it is inherently linear. The coilcontains no saturable components andthe output increases linearly inproportion to current right up to theoperating limit determined by voltagebreakdown. The integrator is alsoinherently linear up to the point wherethe electronics saturates. Linearitymakes Rogowski coils easy to calibratebecause a transducer can be calibrated

at any convenient current level and thecalibration will be accurate for allcurrents including very large ones. Also,because of their linearity, thetransducers have a very wide dynamicrange and an excellent transientresponse.

Coil WindingWith a Rogowski coil it is important toensure that the winding is as uniform aspossible. A non-uniform winding makesthe coil susceptible to magnetic pickupfrom adjacent conductors or othersources of magnetic fields. We havedeveloped special machines for makingaccurate windings. Coils come in a rangeof styles including rigid and flexible coilsbut we have developed several othervariations to meet specific needs.

Output IndicationThe output from the integrator can beused with any form of electronicindicating device that has an inputimpedance greater than about 10kohmsuch as a voltmeter, oscilloscope,transient recorder or protection system.

Split CoilsSome designs of coil can be fitted onthe conductor without the need todisconnect the conductor. Most flexiblecoils can be fitted this way and it is alsopossible to build split rigid coils. Splitiron-cored devices such as currenttransformers are subject to appreciableamplitude and phase errors if the halvesare misaligned by even a small amount.Rogowski coils do not have thisproblem. Misalignment of the joiningfaces of a split Rogowski coil has only asmall effect on the amplitude and noeffect on the phase.

Electronic Trip UnitSelection Criteria for WL CircuitBreakersThe basic criteria for selecting circuitbreakers is:

Maximum Available Short Circuit at theinstallation point. This value determinesthe short circuit current interrupting

rating or short circuit current withstandrating of the circuit breaker.

Rated Current In which is to flowthrough the respective circuit breakercontinuously. This value may not begreater than the maximum rated currentof the circuit breaker. The rated currentfor the WL is determined by the ratingplug, up to the maximum frame rating.

Ambient Temperature of the circuitbreaker. This is usually the temperatureinside the cubicle.

Design of the circuit breaker.

Protective Functions of the circuitbreaker.These are determined by theselection of the appropriate trip unit.

Dynamic Arc-Flash Sentry (PatentPending) A unique feature of the WL tripunit allows the system designer toachieve lower levels of arc flash energyand delayed tripping for selective tripcoordination purposes.

Rating PlugThe Rating Plug is a replaceable modulethat enables users to reduce the rateddevice current for optimum adaptation tothe system; e.g., during startup of a plantsection. The Rating Plug should beselected so that it corresponds to therated current of the system.

Switch-selectable I2t or I4t CharacteristicCurve Improved Overload Protection.

The best possible protection is assuredwhen all protective devices in the systemare optimally coordinated. To achieveoptimum selectivity and coordination, thelong-time characteristic can be switchedbetween l2t and l4t, to improvecoordination with fuses or inverse relays.

Switchable Parameter SetsTo allow the protection to adapt tochanges in system needs such asswitching between utility and generatorfeeds, WL Circuit Breakers support ETUswith two independent parameter sets.Switching between the parameter setsoccurs in less than 100 ms and can bedone remotely or via a contact input to anoptional CubicleBUS module.

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Low Voltage SwitchgearType WL Circuit Breakers Selection

Basic Protective Functions ETU725 ETU727 ETU745 ETU748 ETU755 ETU776

Long-time overcurrent protection L � � � � � �

Short-time delayed overcurrent protection S � � � � � �

Instantaneous overcurrent protection I � � � -- � �

Neutral protection N -- � � � � �

Ground fault protection G -- � � � � �

Additional Functions

Selectable neutral protection -- � � � � �

Defeatable short-time delay -- -- � � � �

Defeatable instantaneous protection -- -- � -- � �

Selectable thermal memory -- -- � � � �

Zone selective interlocking -- -- � � � �

Selectable I2t or fixed short-time delay -- -- � � � �

Adjustable instantaneous pick-up � -- � -- � �

Selectable I2t or I4t long-time delay -- -- � � � �

Adjustable short-time delay and pick-up � � � � � �

Selectable and adjustable neutral protection -- -- � � � �

Dual protective setting capability (DAS)* -- -- -- -- � �

Extended instantaneous protection � � � � � �

Parameterization and Displays

Parameterization by rotary switches (10 steps) � � � � -- --Parameterization by communication (absolute values) -- -- -- � � �

Parameterization by menu/keypad (absolute values) -- -- -- -- -- �

Remote parameterization of the basic functions -- -- -- -- � �

Remote parameterization of the additional functions -- -- -- -- � �

Alphanumeric LCD -- -- � � -- --Graphical LCD -- -- -- -- -- �

Metering FunctionMetering function Plus -- -- � � � �

Communication

CubicleBUS -- -- � � � �

Communication via PROFIBUS-DP -- -- � � � �

Communication via the MODBUS -- -- � � � �

Communication via the Ethernet (BDA) -- -- � � � �

� standard -- not available � optional* DAS- Dynamic Arc Flash Sentry, Siemens patent pending protective feature

� Fixed short-time delay only

Trip Unit Functions

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Low Voltage SwitchgearType WL Circuit Breakers General

Connection Diagram

1 Breaker Data Adapter(BDA)

2 Browser-capable inputand output device(e.g. notebook)

3 WL Circuit Breaker

4 COM16 MODBUSmodule or COM 15 PROFIBUS module

5 Breaker Status Sensor(BSS)

6 Electronic Trip Unit

7 Metering function PLUS

8 Zone Selective Interlocking (ZSI) module

9 Digital output modulewith relay or optocoupler outputs

10 Digital output modulewith relay or optocoupler outputs, remotely configurable

11 Analog output module

12 Digital input module

13 WinPM.Net on PC

14 PLC (e.g. SIMATIC S7)

15 BDA Plus

1 32

13 13

8 9 10 1112

4

5

6

7

14

15

WinPM.NetServer

WinPM.NetWeb Client Ethernet / Internet / Intranet

BDA Plus*

WL Circuit Breakerwith COM 16

* The Siemens BDA Plus or meters, 9330, 9350, 95/9610 canbe used as a gateway to enable Ethernet communicationto the WL Circuit Breaker.

9510 Meter*(Ethernet Gateway)MODBUS Master

PLC or SupervisorySoftware

Ethernet

MODBUSOptional

BDA

WL Communication Overview

Features▪ Industry standard MODBUS or

PROFIBUS communication available onall WL breakers from 200A to 5000A

▪ The high modularity of the WL CircuitBreakers and accessories allows simpleretrofitting of all communicationcomponents

▪ The ability to connect additional inputand output modules to the breaker-internal CubicleBUS of the WL opens upa range of opportunities to reduceecondary device count and wiring andto increase functionality implementedin switchgear

▪ Innovative software products for localconfiguration, operation, monitoringand diagnostics of WL Circuit Breakersusing MODBUS, PROFIBUS or viaEthernet/Intranet/Internet

▪ Complete integration of WL CircuitBreakers in all Totally Integrated Powerand Totally Integrated AutomationSolutions

Metering Function/Metering FunctionPLUSThe integrated metering function can beinstalled on all ETU745, ETU748,ETU755, and ETU776 trip units andprovides a viable alternative to externalmulti-function measuring instruments inmany applications.

Metering Function can measure thefollowing:

▪ Currents

▪ Voltages

▪ Power

▪ Energy

▪ Power Factor

▪ Frequency

All metered quantities are delivered asreal time values with min/maxrecording. The metering module alsocontains additional alarm setpoint andprotective relay functions (e.g. trip onoverfrequency or undervoltage, andalarm on reverse power or over amperedemand).

The Metering Function PLUS has twoadditional wave form buffers andsupports harmonic analysis. With thetwo independent wave form buffers, thecurrent and voltage waveforms can berecorded, and allows detailed diagnostictriggering on events.

If the Metering Function /MeteringFunction PLUS is ordered together withthe circuit breaker, it is already installedand ready for operation. As a retrofitpart, the metering function is simplyattached to the ETU and connected tothe CubicleBUS.

13-51Siemens Power Distribution & Control, SPEEDFAX™ 2007-2008 Product Catalog


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Low Voltage SwitchgearArc Flash Solutions General

Dynamic Arc Flash Sentry (DAS)Laser Scanner SensorSIGUARD laser scanners are opticaldistance sensors which detect anymotion in a 190° working zone. Bytransmitting safe laser pulses and thenevaluating every reflected pulse, theyhave everything safely in view. Andwhen potentially hazardous situations doarise, they respond quickly and reliably.

They can be simply programmed usingeither a PC or a laptop which means thatthey can be quickly and flexibly adaptedto new requirements.

Unified, integrated communications viastandard fieldbuses can be implementedin a fail-safe fashion by transmittingsafety-related and standard datatogether. This means that also with ourSIGUARD laser scanners, you can enjoythe benefits of having just one buscoupling.

SIGUARD laser scanners LS4 – theadvantages at a glance:

▪ Hazardous areas can be contactlesslyand reliably secured with deviceswhich can be universally used: onmachines, production robots, conveyorsystems, vehicles etc.

▪ Standard versions with fail-safesemiconductor outputs

▪ Safe direct connection to AS-InterfaceSafety at Work

▪ User-friendly version with PROFIBUSPROFIsafe connection

▪ When scanners are replaced,parameters are automaticallytransferred via PROFIBUS

▪ Category 3 according to EN 954-1

▪ Up to 4 personnel protective and warningfield pairs which can be freely set

▪ Protective field with max. 4 m radiusfor personnel safety

▪ Extremely compact design

▪ Low current drain (approx. 300 mA)

Function DescriptionMode of operation

The SIGUARD laser scanner LS4 is ascanner which optically andcontactlessly scans areas – and which ispredominantly used for personnelprotection. The laser scanner generatesa continuous train of bundled lightpulses using a laser diode and an opticalsystem. An integrated rotating mirrordistributes these light pulses over thecomplete working area. If objects orpersons enter this field, then thescanner evaluates the reflected lightpulses and, using the light propagationtime, continually calculates the preciseposition coordinates. If the definedpersonnel protective field is violated,then it brings the machine to animmediate stop.

The operating range of SIGUARD laserscanners LS4 extends over 190° and issubdivided into angular segments of0.36°. The scanning rate is 25 scans persecond which means that a light pulse istransmitted every 40 ms into everysegment. A special algorithm ensuresthat objects larger than 70 mm – thiscorresponds to the scanner resolution –are reliably detected. However, it alsoensures that dust and other disturbingeffects do not have a negative impact onthe availability of the system.

SIGUARD laser scanners LS4 detectpersons – even when they are wearingdark clothing – in a safety-related fashionup to 4 meters away. Persons and

objects can be detected at a range of 15m, for example, to output a warningmessage (however, this is not safety-related).Flexibility already on board

SIGUARD laser scanners can be flexiblyadapted to every requirement using fourvariable protective field pairs forpersonnel protection and warning fields.These protective field pairs can besimply set at the PC. The SIGUARDlaser scanner can be used on stationarymachines and systems, but it can alsobe used for mobile applications mountedon vehicles, driverless transport systemsor trolleys. This means, for example, thatvarious operating areas of a robot can besecured where the laser scannerconsecutively scans the different areas.Using four programmable protectivefields, driverless transport systems canbe secured e.g., for fast travel, slowtravel, lefthand and righthand curves.Software for every application

It is extremely easy to precisely set thelaser scanner thanks to the LS4soft PCoperator software. The followingfunctions are integrated:

▪ Protective fields can be easilyconfigured using either a PC or laptop

▪ Additional functions such as protectivefield changeover, restart inhibit etc.can be configured using a softwareassistant

▪ Extensive range of displays – e.g.,defined protective fields, actual scancontour, system settings etc.

▪ Safe access protection usingpasswords with various authorizationstages

▪ LS4soft can run under MicrosoftWindows 95/98/2000/NT/XP

Reflection

E Sc

SF 1

SF 2

SF 3 SF 4

Only personnel protective fields are shown

Working areaWarning field

Personnel protective field 4 m

15 m

50 m

185°– 5°

0.36°

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Low Voltage SwitchgearArc Flash Solutions General

SIGUARD laser scanner “Standard” with protective fieldchangeover and start button

▪ Start button for manual restart directly at the scanner(connection 2)

▪ Alarm output at connection 5 (e.g., warning lamp)

▪ Protective field changeover at connections 4, 6, 7 and 8

▪ Safety-related processing of the safe outputs (connections 11and 12) through an evaluation unit or fault-tolerant PLC

SIGUARD laser scanner “Standard” with 3RG7847-4BBevaluation unit

▪ Start button for manual restart directly at the scanner(connection 2)

▪ Permanently set protective field pair 1 (24 V permanentlyconnected to connection 4)

SIGUARD laser scanner AS-Interface

▪ Directly connected to AS-Interface Safety at Work

▪ Safety-related shutdown using the safety monitor

▪ Protective field changeover as for the standard scanner

▪ A local button can be optionally connected for manual restart

▪ All of the connections are established through M12connectors

SIGUARD laser scanner PROFIBUS

▪ Directly connected to PROFIBUS

▪ The shutdown signal is safely transferred via the PROFIBUSPROFIsafe profile

▪ Safe protective field changeover also via PROFIBUS

▪ Laser scanners can be quickly replaced thanks to theautomatic parameter transfer

▪ A local button can be optionally connected for manual restart

▪ All of the connections are established through M12connectors

1 2 3 4 5 6 7 8 9 10 111213 14 15

Evaluation unit orfault-tolerant PLC

X1

1,25A mT

+ 24V0VPE

SIGUARD laser scanner LS4


1 A

T

1 2 3 4 5 6 7 8 9 10 111213 14 15

Safety output

0V

S1 S33 S34 S35 S31 S22

+24V

A2(L- S12

CH1

CH2

SIGUARD 3RG7847-4BB

K1

K2 N.O

.

N.O

.

21 3

1 2 3A1(L+)

K5*

*provide suitable spark quenching

K4*

6,3

AF

6,3

AF

Contactormonitoring

k4

k5

+ 24V0VPE

S21

1,25AmT


AS-Interface Safety at Work

AS-Interfaceauxiliary voltageor 24 V DC

Optional: Localbutton for restart

24 V

Protective field 1–4

Addressing socket

SIGUARD Laserscanner LS4

PROFIBUS

24 V DC

or terminating resistor at the end node

PROFIBUS

Optional: Localbutton for restart

Connection Examples

13-53Siemens Power Distribution & Control, SPEEDFAX™ 2007-2008 Product Catalog


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