Page 1 Low Voltage Power Circuit Breaker UL 1066 CIRCUIT BREAKER Operating Instructions Catalog No.: WLOPMAN1 DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.
Page 2 Should further information be desired or should particular problems arise, which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the local Siemens sales office. The contents of this instruction manual shall not become part of or modify any prior or existing agreement, commitment or relationship.
Page 3: Table Of Contents
Contents Overview ........1-1 Frame sizes / dimension drawings .
Page 4 10 Reset the reclosing lockout and the Bell Alarm ..10-1 15 Locking devices ......15-1 Resetting the Bell Alarm .
Page 5 21 Door sealing frame ......21-1 Removing vertical adapter ..... 23-12 Removing pole assemblies .
Page 6: Overview
Overview Circuit Breaker  Arc chute (page 23-5) Carrying handle Identification tags  Motor disconnect switch (option) (page 13-3)  Circuit breaker type label (page 2-1)  Spring charge indicator (page 6-7) Mechanical "CLOSE" button Rated current value Racking pictogram (10) Make-break operations counter (option) ...
Page 7: Cradle
Cradle (with optional accessories) (14) (13) (12) (11) 0618-2 (10) Arc chute cover (option) Hole for crane hook Arc vent openings Shutter (option) Locking device shutter (standard for shutters) Mutual mechanical circuit breaker interlocking (option) Locking provision for guide rail Door interlock (option) Locking device in OPEN position (option) (10)
Page 8: Labels
X8-14 (+) X9-8 X9-6 X5-6 X5-10 X5-4 X5-8 Siemens Industry, Inc., Fort Worth, TX 76155 USA Assembled in USA 240 VAC , 10 A / 125 VDC , 0.5 A / 24 VDC , X9-13 0131-FW Type label circuit breaker frame...
Page 9: Frame Designation
Frame designation WLL2332 Type of circuit breaker Siemens interrupting class Frame size No. of poles Maximum rated continuous current. Trip unit designation N450101000001 WLN., WLS., WLH., WLL., WLF., WLM. Type Catalog number Can be used in the following types of circuit breakers Regulatory approvals on a separate label 2 –...
Page 10: Rating Plug Label
Rated current and rated insulation voltage of the cradle Seals of approval Circuit breakers that can be used with this cradle Siemens internal data A second type label is attached to the baseplate inside the cradle or on one of its side walls. 2 – 3...
Page 11: Standard Specifications
The circuit breakers are in conformity with the following standards: - ANSI C37.13 - ANSI C37.16 - ANSI C37.50 - UL 1066 The electronic trip units are in conformity with the following standards: - ANSI C37.17 - UL 1066 The cradles are in conformity with the following standards: - ANSI C37.20.1...
Page 12: Packing And Lifting
Packing and Lifting Unpacking Unpack the circuit breaker and inspect it for damage. If the circuit breaker or cradle is to be installed at a later date: they may only be stored and redispatched in the original packing. NOTICE Equipment Damage. Placing the circuit breaker on its rear side may cause damage to the finger cluster assemblies.
Page 13: Lifting With A Crane
Lifting with a crane DANGER Heavy Equipment. Improper lifting will cause death, serious personal injury, or equipment/property damage. Never lift a circuit breaker or cradle above personnel.Follow instructions for use of lifting bar assembly.  Use OSHA/NIOSH approved crane equipment and personal protection equipment for lifting/moving the circuit breakers and cradles.
Page 14: Lifting With A Lifting Bar Assembly
Lifting with a Lifting Bar Assembly DANGER Heavy Equipment. Improper lifting will cause death, serious personal injury, or equipment/property damage. Never lift a circuit breaker or cradle above personnel.Follow instructions for use of lifting bar assembly.  Use OSHA/NIOSH approved crane equipment and personal protection equipment for lifting/moving the circuit breakers and cradles.
Page 15: Lifting The Circuit Breaker
4.4.3 Lifting the circuit breaker Lifting eye 4.4.4 Lifting the fuse carriage (frame size III) 4 – 4...
Page 16 Catalog No Lifting beam for circuit breaker and cradle (3-pole) WLLFT Lifting beam for circuit breaker and cradle (4-pole) WLLFT4 Portable hoist for use with the lifting beam WLHOIST 4 – 5...
Page 17: Installation
Installation DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. DANGER Heavy Equipment. Improper lifting will cause death, serious personal injury, or equipment/property damage. Never lift a circuit breaker, fuse carriage, or cradle above personnel.
Page 18: Mounting
Mounting 5.1.1 Mounting position WARNING Heavy Equipment Can cause serious personal injury. Use care when racking the breaker into the disconnect position. When a draw-out circuit breaker is mounted tilting toward the front side, it is possible that the circuit breaker may slide out on the rails. 5 –...
Page 19: Mounting On Horizontal Surface -  Mounting Tolerances
Mounting on horizontal surface -  5.1.2 Mounting tolerances The circuit breaker must be mounted on a rigid, level surface, capable of supporting the weight of the breaker, cradle, and associated busbar components. The maximum amount of offset in the mounting plane is 3/64“ (1mm). 3/64”...
Page 20: Cubicle And Ventilation
5.1.3 Cubicle and ventilation Upper ventilation opening Insulating liner use NEMA GPO-3, min. 0.094“ thick or comparable material Lower ventilation opening Insulating liner Minimal cubicle dimensions Cubicle ventilation dimensions Frame Frame Interrupting rating Bottom size Class Width W1 Height H Depth D1 Width W2 Depth D2...
Page 21: Vertical Connections
Main terminal connections  Frame sizes / dimension drawings (page 7-1) For main terminal dimensions of individual frame sizes, refer to: The main terminals and connectors are intended for busbar connection with NEMA hole patterns. The number and size of the busbars connected to the circuit breaker must be selected per ANSI C.37.20.1 in order to meet the test require- ments according to ANSI C.37.51 depending on the rated current, defined by the rating plug.
Page 22: Connecting The Main Conductors
Connecting the main conductors DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. Clean the main conductor connection (plated busbars) Securing line and load-side busbars Use grade 5 bolts “...
Page 23 Recommendation for supporting the main conductors The connecting bars of all poles should be braced together, line and load side separately. Dimension x Rated breaking current Frame size (kA) (mm) (inch) 50 / 65 II fused 85 /100 130 / 150 III fused These distances are recommendations and are not construction specifications.
Page 24: Application And Configuration Of Fused Circuit Breakers
5.3.1.2 Open fuse lockout Every Siemens fused circuit breakers (or fused switch) is equipped with an open fuse lockout (OFLO). The purpose of the OFLO device is to open the circuit breaker (or switch) and hold the device in the trip-free position until after the primary fuses have been replaced.
Page 25 5.3.1.3 Key interlocking of fuse carriage and FS III fused circuit breaker The racking mechanism for the fuse carriage is interlocked with the associated fused circuit breaker. In order to rack the fuse carriage, the associated fused circuit breaker must be open, and the KIRK key must be removed from the circuit breaker, which unlocks the racking mechanism of the fuse carriage.
Page 26: Secondary Wiring
Catalog No. 50881 Ring terminal system 10 AWG Recommendation: Siemens part Catalog No. WL10RL 1) Use of wire end ferrules (crimp style) is possible 1 x up to14 AWG tube-type without insulating sleeve 1 x up to 16 AWG tube-type with insulating sleeve...
Page 27: Breaker Secondary Disconnect
5.4.1 Breaker Secondary Disconnect Arrangement COM15 COM16 Arc chute Secondary disconnect block Field installation Dummy block Secondary disconnect block TX 8 PH 1 0,7 Nm 6 lb-in Secondary disconnect adapter block for high arc chutes. 5 – 11...
Page 28: Cradle Secondary Disconnect Block
Connecting secondary wiring Spring clamp terminal 3,0 x 0,6 1/8“ 5.4.2 Cradle Secondary Disconnect Block Field installation Cradle with sliding contact modules Secondary disconnect blocks Disassembly Secondary disconnect block 5 – 12...
Page 29: Secondary Disconnect Terminal Blocks
For the screw clamp terminal, a low profile, one-piece, sliding disconnect module is also available. 3,0 x 0,6 0,5 Nm 4 lb-in 5.4.3 Secondary disconnect terminal blocks Versions PH 1 3,0 x 0,6 0,5 Nm 1/8“ 4 lb-in 0,5 Nm 4 lb-in Screw clamp terminal system Ring terminal system...
Page 30: Wiring In Cradle
Attaching the secondary disconnect blocks Secondary disconnect blocks Draw-out circuit breaker: Cradle secondary disconnect block 5.4.4 Wiring in cradle NOTICE Impermissable area for wires: Damage to wires in this area. Arcing space Arcing openings Interlockings *) If arc chute covers are available, the wires of the secondary disconnect blocks must not be laid on these covers. 5 –...
Page 31: Catalog Numbers
5.4.5 Catalog numbers Catalog No. Circuit breakers secondary disconnect block WLCNMD Secondary disconnect extension WLCNMDA Screw clamp terminal (SIGUT) system WLGAUXPLUGP Spring clamp terminal WLGAUXPLUGT Ring terminal system WLGAUXPLUGR Cradle secondary disconnect block WLGDSCN Blanking cover WLGDAUXPLUG Ring terminal crimp lug for AWG 10 wire WL10RL Cradle secondary disconnect block with integrated low profile WLGAUXPLUGL...
Page 32: Commissioning
Commissioning Preparation of draw-out circuit breaker 6.1.1 Inserting the circuit breaker into the cradle NOTE  (page Remove padlocks from the shutter and place the locking device in the stowed position 15-19). Check circuit breaker position indicator/ Draw out guide rails green 1) The circuit breaker can only be pushed in when the indicator displays "DISCON".
Page 33: Positions Of The Circuit Breaker In The Cradle
6.1.2 Positions of the circuit breaker in the cradle Primary Secondary Diagram Positon indicator Cubicle Door Shutter Circuit Circuit Withdrawn disconnected disconnected open closed position green Disconnected  disconnected disconnected closed closed position green blue Test position disconnected connected closed closed Connected ...
Page 34: Unlocking The Racking Handle / Withdrawing The Racking Handle
6.1.3 Unlocking the racking handle / withdrawing the racking handle Hold OPEN circuit breaker Push the crank inwards Pull out the handle Lift and hold the control lever Pull out the crank 6.1.4 Racking circuit breaker into connected position Stop Position indicator blue green...
Page 35: Charge The Closing Spring
Charge the closing spring Charging manually WARNING Heavy equipment May result in serious injury and/or property damage. Secure the circuit breaker before charging it manually (e.g. during service on the work bench). Handle force Number of strokes Spring charged NOTE To charge the spring mechanism, grip the handle firmly and carry out each stroke evenly, moving the lever down as far as it will go.
Page 36 Condition after 9 strokes: 0063-2 0063-1 incomplete stroke, repeat stroke completely completely charged Charging with a motor-operated mechanism The motor-operated mechanism starts automatically when the control voltage is applied. The motor switches off automatically when the charging process is completed. The motor will re-engage immediately following spring discharge (closing operation)....
Page 37: Check List For Commissioning
Check list for commissioning DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. Action required Verify the circuit breaker is OPEN Verify the rating plug is installed ...
Page 38: Closing The Circuit Breaker
Closing the circuit breaker Indicators CLOSE button Remote activation Indicators Without motor-operated mechanism With motor-operated mechanism after 10 seconds (The closing spring will be recharged by the motor-operated mechanism immediately after the circuit breaker has closed) Opening the circuit breaker OPEN button Remote activation Without motor-operated mechanism...
Page 39: Tripping
Tripping Tripped by Trip unit Bell Alarm (tripped) indicator S24* Bell Alarm X9.12 X9.14 X9.13 Indicators Without motor-operated mechanism Breaker indicators With motor-operated mechanism The breaker is untripped, and the Bell Alarm is shown reset 6 – 8...
Page 40: Reclosing A Circuit Breaker Tripped By The Trip Unit
Reclosing a circuit breaker tripped by the trip unit NOTE The reason for tripping can be displayed using the "QUERY" button on the trip unit. This is stored for at least two days, provided that the trip unit was activated for at least 10 minutes before tripping. Find reason for tripping Overload in...
Page 41 With mechanical reclosing lockout (optional) Reset Bell Alarm  Electric remote reset of Bell Alarm (page 10-5) (optional) Manual reset of reclosing lockout, Bell Alarm  and tripped indicator (page 10-2) Without motor-operated  mechanism Indicators With motor-operated mechanism  Charge the closing spring (page 6-4) ...
Page 42: Re-Commissioning After Fused Tripping (Not Applicable For 4-Pole)
Re-commissioning after fused tripping (Not applicable for 4-pole) 6.8.1 Measures Frame size II Frame size III Remove fused circuit breaker/ fuse carriage Check downstream loads Identify and remedy cause of Check switchgear tripping Inspect main contacts of fused circuit breaker ...
Page 43 Frame size II Frame size III Reset reclosing lockout Charge closing spring Switch ON 6 – 12...
Page 44: Replacing The Fuses
6.8.2 Replacing the fuses Frame size II - Remove draw-out circuit breaker from cradle - Replace all fuses. Remove all fuses PH 1 Size 6 – 13...
Page 45 Size PH 1 Install fuse Size PH 1 3,2 Nm 70 Nm 28 lb-in 50 ft-lb M12 socket head cap screw Belleville washer Ring terminal Threaded plate 2 x self-tapping collar screws M4 Size 8 Nm 71 lb-in 6 – 14...
Page 46 PH 1 Frame size III Circuit breaker in cubicle Fuse carriage in cubicle - Rack out and remove the fuse carriage. 6 – 15...
Page 47 Replacing the fuse Size 60 Nm 45 ft-lb Socket head cap screw M14x50 Washer Fuse Socket head cap screw M5x12 (6 ± 0,5 Nm) Countersunk screw M6x16 (8 ± 1 Nm) Loosen 2 screws, remove the cover Remove crank with retaining ring from racking shaft Pull out racking shaft on the other side Remove 6 screws securing the racking assembly Take out the complete racking assembly...
Page 48 Frame Size Fuse Rating Fuse Kit (3 fuses) 400 A WLCLF0400 600 A WLCLF0600 800 A WLCLF0800 900 A WLCLF0900 1000 A WLCLF1000 FS II 1200 A WLCLF1200 1600 A WLCLF1600 2000 A WLCLF2000 2500 A WLCLF2500 3000 A WLCLF3000 FS III 6000 A WLCLF6000...
Page 49: Removing From Service
Removing from service Draw-out circuit breaker OPEN the circuit breaker Secondary Circuit Position Indicator Disconnect secondary circuits green Depress the CLOSE button Depress the OPEN button Indicators 6 – 18...
Page 50: Troubleshooting
6.10 Troubleshooting Draw-out Disturbance Possible Cause(s) Remedy breaker Circuit breaker cannot be 1. Spring not charged Charge spring closed. Circuit breaker not ready to close. 2. Undervoltage release not Ready-to-close indicator Energize undervoltage release energized. shows: 3. Mechanical open fuse lock-out For fused circuit breakers: effective Replace defective fuses and press...
Page 51 Fixed-mounted Draw-out Disturbance Possible cause(s) Remedy breaker circuit breaker Circuit breaker cannot be 1. Closing coil not energized or Check or apply correct voltage closed.  incorrectly energized Circuit breaker ready to close.  Ready-to-close indicator: 2. The secondary disconnects Plug in the secondary disconnects have been removed Circuit breaker cannot be...
Page 52: Frame Sizes / Dimension Drawings
Frame sizes / dimension drawings Frame size II Drawout (3-Pole and 4-Pole) 8.35 [212.0] 7.89 [200.5] 5.2461 [133.3] Top ventilation area (must remain unobstructed) Side ventilation area Arc chute cover 10.63 [270] (both sides - must remain (optional accessory) 5.47 [139] unobstructed) Wiring channel 1.75 [44.5]...
Page 53 2000 A 3200 A 800/1600 A 5.25 [133.3] 5.25 [133.3] 5.25 [133.3] 5.25 [133.3] 5.25 [133.3] 5.25 [133.3] 0.25 [6.4] 5.25 [133.3] 5.75 [146.1] 5.25 [133.3] 0.25 [6.4] 0.25 [6.3] 0.25 [6.3] 0.25 [6.3] 0.25 [6.3] 0.25 [6.4] 5.25 [133.3] 5.75 [146.0] 5.25 [133.3] 1.75...
Page 54 HORIZONT AL MAIN VER TICAL MAIN BUS CONNECT OR S BU S C ONNECT OR S 1.75 [44.5] 1.75 [44.5] 5.25 [133.3] 1.75 [44.5] 5.25 5.25 [133.3] 5.25 [133.3] [133.3] 1.75 [44.5] 0.50 [12.7] 0.75 [19.0] HORIZONT AL MAIN VER TICAL MAIN BUS CONNECT ORS BUS CONNECT OR S 1.75...
Page 55 Lif ting Point (Cradle only) Do not lif t b y othe r Lif ting Poin t ( Cradle an d point s. Breaker) Do not lif t b y other point s. 0.75 [19.0] Minimum fre e s pa ce fo r 19.1 3 6.43 circuit breaker racking...
Page 56: Frame Size Ii Fused
Frame size II fused 7 – 5...
Page 57 13.35 7.89 [339.2] [200.5] Top ventilation area (must remain unobstructed) 5.25 [133.4] 5.25 [133.4] 0.25 [6.3] 0.25 [6.4] 1.75 [44.5] Ø0.53 Ø[13.5] 4.00 [101.6] 7.37 [187.3] 0.75 9.25 [19.1] [235.0] 1.75 [44.5] 10.38 [263.6] 5.18 [131.6] 2.88 [73.2] 1.75 2.31 [44.5] [58.7] 5.25...
Page 58 7 – 7...
Page 59: Frame Size Ii, Fixed-Mounted Version
Frame size II, fixed-mounted version 5.12 [130.0] Fixed mount versions are only 5.12 [130.0] 5.12 [130.0] 2.56 [65.0] available with rear vertical connector 0.79 [20.0] for FS2 3200A and FS3 4000A/5000A 1.57 [40.0] 5.91 [150.0] required space for aux. connectors including wire-channel 0.39 [10] up to 1600A press-in-nut...
Page 60: Frame Size Ii, Door Cut-Outs
Frame size II, door cut-outs Door cut-out and mounting holes for edge protector Door cut-out (with edge protector) (door sealing frame) breaker front panel breaker front panel R0.39 (Max. radii, 4 plc's) [R10.0] 13.38 [339.9] 2.74 [69.5] 0.83 1.40 Ø1.42 [21.1] [35.5] [Ø36.0]...
Page 61: Frame Size Iii, Fixed-Mounted Version
Frame size III, fixed-mounted version Fixed-mounted versions are only available as 4-pole with vertical connections. required space for aux. connectors including wire-channel required space for aux. connectors including wire-channel press-in nut M 10 (metric thread) 1.20 [30.5] 1.75 [44.4] 0.55 [ 14.0] 20.67 [525.0] 17.77 [451.5] 7.50 [190.5]...
Page 62: Frame Size Iii Drawout
Frame size III Drawout (3-Pole and 4-Pole) 8.35 [212.0] Top ventilation area 7.89 [200.5] (must remain unobstructed) 10.63 [270.0] Side ventilation area Arc chute cover 10.24 [260.0] (both sides - must remain (optional accessory) Wiring channel 1.85 [47.0] 5.47 [139.0] unobstructed) Optional ground strap 20.34 [516.7]...
Page 63 3.75 [95.2] 8.27 [210.0] 8.27 [210.0] 8.27 [210.0] 7 – 12...
Page 64 7 – 13...
Page 65: Frame Size Iii, Fuse Carriage
Frame size III, fuse carriage 7 – 14...
Page 66 7 – 15...
Page 67: Frame Size Iii, Door Cut-Outs
Frame size III, door cut-outs Door cut-out (with edge protector) RO.39 (Max. radii, 4 plc´s) [RIO.O] 13.39 [340.2] 2.74 [69.5] 0.83 [21.1] ø1.42 [ø36.0] 1.40 [35.5] 4.45 [113.1] 5.71 [145.1] 11.42 [290.1] Door cut-out Minimal door cut-out (middle escutecheon visible) (only center escutecheon visible) [R0.08] (Max.
Page 68 Additional information on: Cut-outs for "through-door racking" with Door sealing frame (page 21-1) are shown in Chapter 21. Cut-outs for attaching the plexiglass cover are shown in Chapter 22 7 – 17...
Page 69: External Sensor For Neutral Conductor
External sensor for neutral conductor WLNCT2 7 – 18...
Page 70 WLNCT3 7 – 19...
Page 71: Further Dimension Drawings
Iron Core: WLG800NMCT23, WLG1200NMCT23, WLG1600NMCT23, WLG2000NMCT23, WLG2500NMCT23, WLG3000NMCT23, WLG3200NMCT23, WLG4000NMCT23, WLG5000NMCT23, WLG6000NMCT23, WLGNMDGCT23 7.10 Further dimension drawings  (page 21-1) Door sealing frame  (page 22-2) - Shrouding cover Additional information on: Cut-outs for "through-door racking" with Door sealing frame (page 21-1) are shown in Chapter 21....
Page 72: Circuit Diagrams
Circuit diagrams Terminal assignment ANSI Internal Terminals External C37.2 device Bell Alarm S24 Signalling switch for 2nd shunt trip 52CS 52CC Control power LT / (+) 52CS Signaling switch for remote tripping Open Fuse Indication S26 X9.4 Open Fuse Lockout Device (FS III Only) OFLO Fuse carriage FS III X9.3...
Page 73: Auxiliary Switches
Auxiliary switches S1, S2 S3, S4 Optional additional auxiliary switches Optional auxiliary switches Terminals Wire no. Internal Wire no. Terminals 8 – 2...
Page 74: Signaling Switches
Signaling switches Open Fuse Indication S23 *) T minals Wire no. Reset Internal TC/UVR Wire no. Terminals *) Same installation location as S43 " " 1) Contact closed means that the undervoltage release is energized or shunt trip is not energized - circuit breaker is possibly ready to close "...
Page 75: Shunt Trip, Undervoltage Trip / Electrical Closing Lockout
Shunt Trip, Undervoltage Trip / Electrical closing lockout F2, F3, F4 **) UVRD EMERGENCY OPEN or short terminals **) Same installation location 1) For circuit breaker equipped with shunt trip and closing coil, the combined cutoff- switch S14 / S15 will be used. (One switch NO + NC is serving both solenoids.) 8 –...
Page 76: Closing Coil / Electrical Close
Closing Coil / Electrical CLOSE S10 *) *) Same installation location as S12 1) For circuit breaker equipped with shunt trip and closing coil, the combined cutoff- switch S14 / S15 will be used. (One switch NO + NC is serving both solenoids.) 2) Use twin wire end ferrule...
Page 77: Motor-Operated Mechanism
Motor-operated mechanism S12 *) 24 - 30 V DC 48 - 60 V DC  X5.2  X5.1 *) Same installation location as S10 Remote Bell Alarm Reset 8 – 6...
Page 78: Trip Unit Circuitry For Etu745-776
Trip unit circuitry for ETU745-776 With Breaker Status Sensor (BSS)  8.8.1 and metering module External Iron Core External Air Core Sensor Input Sensor Input Terminating resistor 120  0.5 W on X8-1 / X8-2, if no external c module If no metering module and no BSS module is used: ...
Page 79: Metering Module Only
8.8.2 Metering module only External Iron Core External Air Core Sensor Input Sensor Input Terminating resistor 120  0.5 W on X8-1 / X8-2, if no external c module 8 – 8...
Page 80: Breaker Status Sensor (Bss) Only
8.8.3 Breaker Status Sensor (BSS) only External Iron Core External Air Core Sensor Input Sensor Input Terminating resistor 120  0,5 W on X8-1 / X8-2, if no external c module 8 – 9...
Page 81: Electronic Components
Electronic components Trip units 9.1.1 Overview of function Trip Units Functions ETU745 ETU748 ETU776    (9-2) (9-6) (9-8)  Basic protective functions (page 9-12) Overload protection (L-tripping) Short-time-delayed short-circuit protection (S-tripping) Instantaneous short-circuit protection (I-tripping) Neutral conductor protection (N-tripping) ground-fault tripping ...
Page 82: Trip Unit Etu745
9.1.2 Trip unit ETU745 Overview Mechanical RESET for Bell Alarm Option: Reset Lockout and remote trip prevents accidental resetting of the lock-out mechanism after a trip Scroll up Option: Alphanumeric display Trip unit activated Scroll down Trip unit error indicator Indications Overcurrent alarm Thermal memory On/Off...
Page 83 Overcurrent protection settings NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. The parameters for the basic functions are adjusted with rotary coding switches. The value 0.1 is set if the rotary switch is positioned in this zone 3 x 0.5...
Page 84 Characteristics The ranges shown in the following are only setting ranges of the respective parameters. Possible tolerance ranges are not included here. Tolerance ranges are shown in the Easy TCC Time Current Curve Software. The characteristics apply to the circuit breaker version H-class, 480 V, frame size II, with ground-fault protection module. L-tripping S-tripping 9 –...
Page 85 I-tripping Ground-fault tripping 9 – 5...
Page 86: Trip Unit Etu748
9.1.3 Trip unit ETU748 Overview Mechanical RESET for Bell Alarm Option: Reset Lockout and remote trip prevents accidental resetting of the lockout mechanism after a trip Scroll up Option: Alphanumeric display Trip unit activated Scroll down Indicators Trip unit error indicator Overcurrent alarm Thermal memory On/Off COMMUNICATIONS...
Page 87 Overcurrent protection settings NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. The parameters for the basic functions are adjusted with rotary coding switches. The value 0.1 is set if the rotary switch is positioned in this zone 3 x 0.5...
Page 88: Trip Unit Etu776
9.1.4 Trip unit ETU776 Overview Mechanical RESET Option: Reset Lockout for Bell Alarm and prevents accidental resetting of the lockout remote trip mechanism after a trip Graphical display Trip unit activated Indicators Overcurrent alarm Trip unit error indicator COMMUNICATIONS Operating keys for setting tripping parameters Trip cause indicator Sealing eyelet...
Page 89 Overcurrent protection settings NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. All parameters for the basic and the additional functions can be adjusted via: ...
Page 90: Indicators
9.1.5 Indicators Scope of indications depends on the type of trip unit. Trip unit is activated I > I - or when 24 V auxiliary power is applied. - 80 A for frame size II - 150 A for frame size III Flashing LED Overcurrent alarm - Steady LED, if...
Page 91 Protective function has tripped (overcurrent) - Indicator lights up when the Query button is pressed - Only one trip cause is displayed - Only the last trip cause is  displayed LED T.U. ERROR 1. T.U. Error flashes: Limited protective function, the protective parameters are reset to minimum values.
Page 92: Protective Functions
9.1.6 Protective functions 9.1.6.1 Basic protective functions The basic protective functions of the trip unit are ensured without additional auxiliary voltage. The required energy is supplied by the  circuit breaker's internal energy transformers. To evaluate the currents, the electronic system of the trip unit calculates the r.m.s value. The individual functions are parameterized according to the types via: - rotary coding switch (ETU745 - 748) - electronic data transfer (ETU776) via:...
Page 93 Motor protection function In the circuit breaker position t 0.02 sec., a special protection function for electromotive drives is activated. It prevents the short-time delayed short-circuit tripping from being activated during the switch-on current peak of electric motors. At the same time, a phase failure ...
Page 94 Neutral conductor protection – N-tripping Trip units ETU745 - 776 also make it possible to protect the neutral conductor against overload. This requires a current transformer for the  (page 9-91) neutral conductor, which can be retrofitted if necessary. For tripping, the same long-time delay t applies as for overload tripping.
Page 95 Thermal memory can be switched On/Off Trip units ETU745 - 776 make it possible to continue with the internally calculated reproduction of the thermal processes in downstream switchgear and consumers even if the circuit breaker is open and the electronic system has no external supply. In this way, an effective protection against thermal overload can also be guaranteed for frequent closing and opening processes.
Page 96 Short-time delayed short-circuit protection switchable to I Trip units ETU745 - 776 make it possible to switch over from a constant delay time to an I t-characteristic. In this way, the delay time depends on the short-circuit current, but with a constant I -value, providing better coordination with downstream fuses.
Page 97 Ground-fault protection switchable to I t characteristic The ground-fault protection modules for trip units ETU745 - 776 make it possible to switch over from a constant delay time to an  t characteristic. This provides an inverse-time tripping characteristic with a constant I value, providing better selectivity of the ground-fault protection in systems with several grading levels.
Page 98: Etu Displays
9.1.7 ETU displays 9.1.7.1 Alphanumeric display Trip units ETU745 and ETU748 can be retrofitted with an alphanumeric display. Overview Screen (4 lines with 20 characters each) Up key Down key 9 – 18...
Page 99 Field installation The trip units ETU745 and ETU748 can be field installed with an alphanumeric display. DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. ...
Page 100 Modifying the angle of the display At the factory, the alphanumeric display is installed with a downward inclination. However, it can be turned in a vertical direction by 180°, the display is then inclined upwards. DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.
Page 101 Turn the display through 180°, insert and lock it into place  (page 9-53) - Fit and seal the trip unit sealing cap, if applicable - Reconnect external 24 V DC voltage supply, if applicable Catalog number Catalog No. Alphanumeric display for ETU745 - 748 WLLCD48 9 –...
Page 102 Menu structure ETU745 - 748 After the supply voltage has been applied, the display changes from "Power-up screen" to "Autoscroll" mode after about 5 sec Thereafter, further modes can be accessed by means of the two buttons. Overview Start Power-up-screen Mode Mode "Autoscroll"...
Page 103 Screens displayed in "Autoscroll" mode without measurement module  Screen 1  Current I I1..=..00000.A 1 Current I I2..=..00000.A 2 I3..=..00000.A Current I 3 IN..=..00000.A Current I  Screen 2   Ground-fault current I Ig..=..00000.A (A value is only displayed if a ground-fault protection mod- ule is fitted.) with metering module installed, additionally...
Page 104 To access "Fixed screen display" mode, press the following button: In "Autoscroll" mode In this mode, maintenance information is provided with the number of circuit breaker trips and switching operations as well as with maintenance instructions. The information displayed depends on the number of circuit breaker trips operations. ...
Page 105 Screens displayed in "Tripping counter reset" mode  Screen 2  Trips.and.Ops Counter reset for trips and switching operations con- Counter.reset firmed. continue:. .or. Button functions in "Tripping counter reset" mode If screen 1 is displayed Canceling, no counter reset to zero Change to "Autoscroll"...
Page 106 "Parameter setting" mode NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. In this mode, the following parameters can be adjusted: - load shedding - load restore - delay time for load shedding/load restore...
Page 107 "Contrast setting" mode In this mode, the contrast of the display can be adjusted. To access "Contrast setting" mode, press the following  button(s): In "Autoscroll" mode Screens displayed in "Contrast setting" mode  Screen 1  Contrast Adjust Contrast setting The longer the bar, the higher the contrast 100 %...
Page 108 "Display parameter changes" screen The display automatically switches to this mode when a parameter has been changed via the rotary coding switches, provided an external 24 V DC voltage supply has been connected. Screens displayed in "Display parameter changes" mode ...
Page 109 9.1.7.2 Graphical display The ETU776 trip unit equipped with a fixed-mounted graphical display as standard. This display enables a text output with a maximum of 8 lines or the graphical representation of characteristics. It is used both to display data as well as to parameterize the trip unit and the measurement function. The display is operated via the operating keys provided on the trip unit.
Page 110 Representation of bar diagrams The measured values for some parameters are displayed both as numerical values and graphically in the form of a bar diagram. Lowest measured value Present measured value Current measured valuee 100% of the measured parameter Width of display The markings for the lowest and highest measured value are automatically updated during the measurement.
Page 111 Navigating in the menu structure Use the operating keys to navigate in the menu structure. Button functions Shift the marking Select the marked menu item Switch back to the previous menu Selection of a menu item  9 – 31...
Page 112 Displaying measured values Example 1: Displaying the currents M A I N M E N U M E T E R I N G C U R R E N T M e t e r i n g 7 5 2 7 6 5 7 0 6 a v g...
Page 113 Example 3: Displaying harmonics M A I N M E N U M E T E R I N G F R E Q U E N C Y M e t e r i n g 7 5 2 5 0 .
Page 114 Example 5: Displaying active power M A I N M E N U M E T E R I N G P O W E R a v g M e t e r i n g 7 5 2 2 7 8 2 5 2 a v g...
Page 115 Example 7: Adjusting representation of characteristics M A I N M E N U D I A G N O S T I C W A V E F O R M M e t e r i n g W a r n i n g s W a v e f o r m S e t u p...
Page 116 W A V E F O R M S E T U P S E T T R I G G E R S e t T r i g g e r T r i g g e r = S e t T r i g g e r T r i p...
Page 117 Example 8: Selecting event for displaying characteristics M A I N M E N U D I A G N O S T I C W A V E F O R M M e t e r i n g W a r n i n g s W a v e f o r m S e t u p...
Page 118 D I S P L A Y W A V E F O R M E V E N T U P L O A D E v e n t U p l o a d C u r r e n t s D i s p l a y G r a p h C u r r e n t s...
Page 119 Example 9: Displaying characteristics M A I N M E N U D I A G N O S T I C M e t e r i n g W a r n i n g s D i a g n o s t i c T r i p L o g V i e w...
Page 120 W A V E F O R M W a v e f o r m S e t u p D i s p l a y W a v e f o r m TRIG W A V E F O R M W A V E F O R M W A V E F O R M = - 1 0 0 , 0 0 0...
Page 121 Changing parameters Example 10: Setting protection parameters M A I N M E N U C H A N G E P A R A M E T E R P R O T . P A R . S E T M e t e r i n g S y s t e m C o n f i g .
Page 122 T r i p T r i p T r i p S t a t u s = S t a t u s = S t a t u s = P i c k u p = 1 0 0 0 P i c k u p = 1 0 0 0...
Page 123 Identifications Example 12: Identifications M A I N M E N U I D E N T I F I C A T I O N T R I P U N I T S / N M e t e r i n g T r i p U n i t P a r t #...
Page 124: Rating Plug
9.1.8 Rating plug The rating plug defines the rated current I within a certain range for a given circuit breaker frame size. If a rating plug with a higher current than the maximum permissible circuit breaker rated continuous current is plugged in, the electronic system of the trip unit recognizes this error and signals it with a flashing T.U.
Page 125: Ground-Fault Protection Modules
Replacing rating plug NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. OPEN 9.1.9 Ground-fault protection modules Various trip units can be optionally equipped with ground-fault protection modules.
Page 126 Module GFM AT 745 Changeover switch for ground-fault detection ground-fault alarm Indicators ground-fault tripped Rotary coding switch for ground-fault protection setting value Rotary coding switch for ground-fault Rotary coding switch for ground-fault delay setting t alarm setting value - Ground-fault protection by circuit breaker tripping and alarm signal - Changeover switch for ground-fault protection accessible only when the control panel or the trip unit itself is removed Module GFM A 776 Ground-fault detection mode...
Page 127 Field installation DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker. Removing dummy module Installing and snapping the ground-fault protection module into place - Switch on external 24 V DC voltage supply, if planned...
Page 128 NOTE Once the ground-fault-module is snapped into place, it cannot be removed. Catalog numbers Ground-fault protection module Catalog No. GFM A 745-748 WLGFA48 GFM AT 745-748 WLGFM48 GFM A 776 WLGFA76 GFM AT 776 WLGFM76 9 – 48...
Page 129: Replace The Trip Unit
9.1.10 Replace the trip unit DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 130 Remove connectors N sensor BSS module Current sensors Equipment dependent on type Energy transducer PH 1 1,2 ± 0,3 Nm 11 lb-in Installation is carried out in the reverse order.  (page 9-97) After replacing the trip unit, always test with the handheld test device For ordering trip units, please refer to the latest version of the "Selection and Application Guide"...
Page 131: Internal Trip Unit Self-Test On The Overcurrent Tripping Function
9.1.11 Internal trip unit self-test on the overcurrent tripping function For commissioning and function testing. Conditions - Trip unit is activated by: operating current external 24 V DC voltage supply - Current not in overload range  Indicators (page 9-10) Internal circuit breaker self-test without tripping Normal operation of the circuit breaker is not impaired The test can be canceled...
Page 132 NOTICE Circuit breaker may trip. If the trip settings are changed while the breaker is closed (and under load) the breaker may trip. Adjust parameters only when the circuit breaker is in the open position. Internal circuit breaker self-test with tripping he test can be canceled at any time by pressing CLEAR 0075-01-02...
Page 133: Sealing And Locking Device
9.1.12 Sealing and locking device lock remove seal NOTE Keep sealing wire as short as possible. Catalog No. ETU745 - ETU748 WLTUSC55 ETU776 WLTUSC76 9 – 53...
Page 134: Cubiclebus Modules
CubicleBUS Modules 9.2.1 System architecture Close/Open - AO: Analog output module - BDA: Breaker Data Adapter; adapter for parameterizing, operating and monitoring the circuit breaker via any input/output unit with browser features; connection via test socket of trip unit or RJ45 to the last external cmodule - BSS: Breaker Status Sensor for acquisition of signals about the circuit breaker status (always combined with COM15/16 module) - c: Internal bus system for interconnection of circuit breaker components and for connection of external c modules...
Page 135: Internal Modules
9.2.2 Internal modules 9.2.2.1 Breaker Status Sensor (BSS) For collecting circuit breaker status information via signaling switches and transmitting these data to the c. Trip Unit UVR or 2nd shunt trip Springs Signaling switches for BSS (5) (6) (7) Spring charge signaling switch OPEN / CLOSE position Signaling switch Ready-to-close signaling switch...
Page 136 Installing the BSS module DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 137 Attaching signaling switch S43 to the 2nd shunt trip / UVR UVR / 2nd shunt trip: signaling switch S 43 See-saw Signaling switch Guide Groove Attaching signaling switch S45 to the ETU carriage black wiring 9 – 57...
Page 138 Connecting BSS module The first cconnection leads to the secondary disconnect block X8. The second cconnection is made according to the circuit breaker equipment.  Circuit diagrams (page 8-1) ETU745 - 776 without metering function ETU745 - 776 with metering function X51-X52 External conducted cubicle bus link does only exist in release 1.
Page 139 Overview Connection terminals for additional inputs and outputs to provide special functions SUB-D plug, 9-pole, for PROFIBUS-DP connection PROFIBUS-DP Connecting cables to hand plug X8 connection for connecting external modules or for the terminating resistor Indications Indication Significance No voltage at COM15 PROFIBUS-DP green PROFIBUS-DP...
Page 140 Fitting COM15 module on the cradle DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. OPEN circuit breaker  (page 23-2) - Move the circuit breaker into the withdrawn position in the cradle (page 23-3) COM15 module S46, S47 and S48:...
Page 141 Connecting wires  Circuit diagrams (page 8-1) 3,0 x 0,6 1/8“ 0,5 Nm 4 lb-in Hand plug X8 Connecting cable to first external CublicleBUS module or terminating resistor Connecting cable to hand plug X8 Designation Assignment Terminal X8-1 X8.1 X8-2 X8.2 X8-3 24 V DC +...
Page 142 9.2.2.3 COM16 module Interface adapter for: - converting csignals to MODBUS signals and vice-versa - for draw-out circuit breakers: detecting the circuit breaker position in the cradle with the signaling switches S46, S47 and S48, and emitting corresponding signals on the cand the MODBUS. - providing special functions via additional inputs and outputs (e.g.
Page 143 MODBUS interface The COM16 module is equipped with a 2-wire RS485 interface. The MODBUS connector is a 9-pin female Sub-D connector with the following pinout: COMMON Transceiver Terminal 1, V1 voltage Transceiver Terminal 0, V0 voltage 2-4, 6-8 Not connected The cable shielding must be connected to the circuit breaker's protective grounding to prevent EMF disturbances being channeled into the module.
Page 144 MODBUS Functionality Transmission Protocol The COM16 module operates in the RTU transmission mode. ASCII transmission mode is not supported. Overview of supported Functions The COM16 module provides the following MODBUS function codes for accessing the data contained in the WL circuit breaker. Name Description Read Discrete Inputs...
Page 145 MODBUS Communication settings For MODBUS communication, the following settings must be made in the COM16 module: baud rate, serial transmission configuration, MODBUS address. MODBUS Slave Address The MODBUS communication address range of the COM16 module is 1 through 126. MODBUS address 0 is used as a broadcast address in MODBUS systems. MODBUS address 0xF1(hex) is defined as a broadcast address for COM16 modules.
Page 146 Changing the communication parameters The communication parameters of the COM16 module can be changed by writing the required parameters (baud rate, serial configuration and MODBUS communication address) in data set 160. Register Dataset 160 – communication parameters High/ Address: A000 hex, Registers: 39, Access: Read / Write Address Data Source...
Page 147 MODBUS function codes In addition to the MODBUS function codes of the COM16 module, described on page 9-63, the following definitions of the Status Register, Control Bits, Extra Flags, Basic Types and Exception Status Bits apply to the COM16 module. Status Register The Status Register provides WL status information to the MODBUS master.
Page 148 Control Bits and Extra Flags Control Bits and Extra Flags make it possible for the MODBUS master to control various WL functions. The Control Bits and Extra Flags are accessed using the following functions: - 01 Read Coils - 05 Write Single Coil - 15 Write Multiple Coils Bit number Breaker open / close...
Page 149 Basic Data Types Basic data types 1, 2 and 3 are supported. Basic data type 1 is the default setting. Basic data type 1 consists of 7 registers, basic data type 2 consists of 13 registers and Basic data type 3 consists of 22 registers. Basic data is accessed using the function: 04 Read Input Registers - Reads the Basic Data including the Status Register Basic Data Type 1 Registers and Default Data Points...
Page 150 Basic Data Type 2 Registers and Default Data Points Register Byte Name Default Data Point – WL 0, 1 Status Register WL status bits 2, 3 Data Block 1 Phase L1 current 4, 5 Data Block 2 Phase L2 current 6, 7 Data Block 3 Phase L3 current...
Page 151 Basic Data Type 3 Registers and Default Data Points Register Byte Name Default Data Point – WL 0, 1 Status Register WL status bits 2, 3 Data Block 1 Phase L1 current 4, 5 Data Block 2 Phase L2 current 6, 7 Data Block 3 Phase L3 current...
Page 152 Exception Status Bits The Exception Status Bits are accessed using the following functions: 07 Read Exception Status - Reads the state of the Exception Status Bits Description Excessive breaker contact wear Communication with trip unit OK COM16 is OK 3 - 7 Reserved Further information about the application of these inputs and outputs is given in the "WL MODBUS Communication Manual"...
Page 153 These data can be shown on the display of the trip units, transmitted to the PROFIBUS-DP via the COM15 module or to the MODBUS via the COM16 module and transferred to the outputs of external cmodules. Based on these data, conclusions can be drawn about the condition of the power system.
Page 154 Extended metering functions The metering function PLUS is used to implement extended protective functions beyond the functionality of the trip units. Parameter Range Delay Undervoltage 100 - 1100 V 0 - 15 sec. Overvoltage 200 - 1200 V 0 - 15 sec. Active power in normal direction 1 - 12000 kW 0 - 15 sec.
Page 155 Setpoints The setpoint function can be used to signal or record special events in the power system. Parameter Range Delay Phase overcurrent 30 - 10000 A 0 - 255 sec. Ground overcurrent 30 - 12000 A 0 - 255 sec. Neutral overcurrent 30 - 10000 A 0 - 255 sec.
Page 156 Additional functions The metering function Plus offers two additional functions: - two independent waveform buffers - harmonic analysis The two independent waveform buffers can be used to analyze the current and voltage values at the time of the event. If the waveform buffers are programmed to "recording" (standard setting), continuous recording takes place until a previously defined event occurs.
Page 157 9.2.2.5 Connecting the voltage transformer DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. The metering module ("MeterPLUS Function") can be set to expect 3W or 4W (LL/LG) connections and will adjust the amplitude and phase of the signal as necessary.
Page 158: External Cubliclebus Modules
9.2.3 External CublicleBUS modules 9.2.3.1 General Application External cmodules are used for communication between the WL circuit breaker and the secondary equipment in the circuit breaker panel. They are provided to control analog indications, transmit the circuit breaker tripping status and the reason for tripping  and to read additional control signals.
Page 159 Circuit breaker without COM15/16 module Connecting cable to 1 module (4-core, cores X8-4/X3-1 twisted with X8-3/X3-4 and X8-1/X3-2 twisted with X8-2/X3-3) Connecting cables between modules modules  Terminating resistor 120 0.5 W Cable connection for 24 V DC voltage supply 9 –...
Page 160 Circuit breaker with COM15/16 module Only if there are more than 2 modules: Connecting cables between the X8 and the first module for 24 V DC voltage supply Connecting cables between modules modules  Terminating resistor 120 0.5 W Connecting cables between the modules for 24 V DC voltage supply Connecting cable between COM15/16 and the first module (with two RJ45 plugs) COM15 / COM16...
Page 161 Setting principle The value 0.1 is set if the rotary coding switch is positioned in this segment 3 x 0.5 1/8“ Indicators Indication Significance green Module in operation DEVICE yellow Module in test mode Module faulty green Connection to available No connection to yellow Option set or signal available...
Page 162 Testing LEDs only Pushing the "Test" button several times with pauses in between switches the LEDs on successively. After the last LED, all LEDs are switched on. Repeated pushing the "TEST" button starts the test mode again, and all LEDs, inputs and outputs are switched off. Quitting the test mode Do not press the "TEST"...
Page 163 Terminal assignment Terminal Connection Only for bus couplers; TIE BRKR Allows complete ZSI functionality in systems with buscouplers so that various energy flow directions can be taken into account. ZSI IN ZSI modules of lower-level circuit breakers ZSI OUT ZSI modules of higher-level circuit breakers MV OUT Signal to the medium-voltage level Observe the specified polarity when connecting: plus to plus and minus to minus.
Page 164 Settings  Setting principle (page 9-81) Settings ZSI module ZSI function deactivated ZSI module effective for short-time delayed short-circuits only ZSI-module effective for ground-fault protection only ZSI-module effective for short-time delayed short-circuits and ground-fault protection TEST Test position for checking the ZSI functionality Indicators ...
Page 165 Terminal assignment Input Terminal assignment of digital input module Inputs 4-6 Inputs 1-3 Settings  Setting principle (page 9-81) Settings of digital input module Inputs 1-6 are active. INPUT If there is an input signal present, a corresponding message is transmitted  to the via the COM15/16 module.
Page 166 9.2.3.4 Digital output modules Function With digital output modules, up to 6 signals can be transmitted. If the trip unit signals an event, the corresponding LED lights up after the adjusted delay time has elapsed, and the module sets a signal at the corresponding output.
Page 167 Terminal assignment Digital output modules with rotary coding switch Output assignment 1 Delay time setting Output assignment 2 Configurable digital output modules Terminal assignment of digital output module Outputs 4-6 Outputs 1-3 9 – 87...
Page 168 Digital output modules with relay output provide changeover contacts at their outputs. Current carrying capacity of the outputs 250 V AC, 12 A Relay output 25 V DC, 12 A Settings Digital output modules with rotary coding switch  Setting principle (page 9-81) Terminal assignment 1 (TRIP) Signaling contact overload tripping Signaling contact short-time delayed short-circuit...
Page 169 9.2.3.5 Analog output module Function With the analog output module, analog measured values can be transmitted, which can be shown on the cubicle door by means  of moving-coil instruments. A total of 4 outputs is available. For the output signal, two different formats can be selected: - 4 - 20 mA, output via terminal strip X5 - 0 - 10 V, output via terminal strip X4 Installation...
Page 170 Indicators  (page 9-81) Testing  (page 9-81) 9.2.3.6 Catalog numbers Each cmodule is supplied with a 0.2 m (7.8") connecting cable for the cconnection. c module Catalog No. ZSI module WLZSIMD Analog output module WLANLGCUB Digital output module with relay output WLRLYCUB Digital output module with relay output, parameterizable WLRLYCCUB...
Page 171: External Sensor For Neutral Conductor
9.2.4 External sensor for neutral conductor Version for copper bar on switchgear side Mounting bracket Screw M6 with washers and nut Version with copper connectors Connector P2 Connector P1  Dimension drawings (page 7-18) Terminal assignment Remove bridge X8.9 - X8.10 External N sensor Main conducting path X8.9...
Page 172: External Voltage Supply
The external voltage supply with 24 V DC must fulfill at least the requirements of UL class 2. To supply power to a circuit breaker equipped with the maximum possible number of external cmodules, one of the Siemens power supply units listed below can be used. If a second circuit breaker is to be supplied, a second power supply unit is also required.
Page 173: Breaker Data Adapter
Breaker Data Adapter 9.4.1 Application The Breaker Data Adapter (BDA) makes it possible to parameterize, operate and monitor the circuit breaker without additional software by means of a browser-capable input/output device (e.g. a laptop). This is possible for circuit breakers equipped with trip units of the types ETU745 - 776.
Page 174 Offline mode All circuit breaker parameters can be entered and saved on a laptop, for example, without the need to communicate with the circuit breaker. When the connection to the circuit breaker is established, these data can be transmitted and the circuit breaker can be parameterized auto- matically....
Page 175 Local operation The circuit breaker is parameterized directly on site. The parameter settings can also be saved on the laptop computer and the diagnostic data of the circuit breaker can be read. Browser-capable input/output unit (e.g. laptop computer) 24 V DC voltage supply if no voltage supply is provided via the c BDA or BDA PLUS Test socket of the trip unit (40-pole) Connection cable SUB-D, 15-pole (BDA) to SUB-D, 40-pole (test socket of trip unit)
Page 176: Voltage Supply
Remote access via Ethernet The circuit breaker data, including parameterization, are accessed via customer-side Ethernet. This connection type is only possible in the BDA PLUS version. Browser-capable input/output device (e.g. laptop computer) Ethernet cable BDA PLUS External module Connection cable SUB-D, 15-pole (BDA) to RJ45 plug (c connection) Ethernet connection 9.4.5 Voltage supply...
Page 177: Handheld Test Device
Handheld test device The handheld test device is used to check that the trip unit, the energy and current transformers, the F5 tripping solenoid and the measured value display are functioning properly. 9.5.1 View Test Device for WL Electronic Trip Units CURRENT TRANSFORMER TEST L1 L2 L3 N POWER...
Page 178: Connecting
9.5.3 Connecting NOTE Observe the connecting sequence. Malfunctions and incorrect test results may result if the sequence is not observed. Test socket of the trip unit 40-pole ribbon cable with plugs Voltage supply Handheld test device 9.5.4 Voltage supply The handheld test device is supplied by a 110 - 125 V AC network. 9.5.5 Operation The status test begins after the voltage supply has been connected.
Page 179 Testing the current and energy sensors To test the current sensors and energy transducers, press the "START" button. START A lit-up LED confirms the proper operation of the corresponding sensor/converter. If an LED flashes, the corresponding  sensor/converter is not present, not properly connected is defective. Testing the tripping function To test the tripping function, press one of the buttons "L", "S", "I", "N"...
Page 180 Neutral conductor tripping test The long-time delayed short-circuit tripping function for the neutral conductor and the trip unit circuitry for ETU types 727-776 can be tested using the test device.The current sensor for the neutral conductor must be attached (page 9-91) and the "Neutral conductor protection"...
Page 181: Finishing
9.5.6 Finishing - Restore the documented settings - Mount the cover on X25 9.5.7 Catalog numbers Catalog No. Handheld test device WLTS Replacement cables WLTSC 9 – 101...
Page 182: Reset The Reclosing Lockout And The Bell Alarm
Reset the reclosing lockout and the Bell Alarm 10.1 Resetting the Bell Alarm Circuit breaker is tripped by trip unit Automatic reset Automatic reset of the maglatch Tripping solenoid Signals Indicators Trip Bell Alarm X9.12 X9.14 Circuit breaker is immediately ready to close again,  if closing spring is charged.
Page 183: Resetting The Bell Alarm With Reclosing Lockout (Optional)
10.2 Resetting the Bell Alarm with reclosing lockout (optional) WL circuit breakers are normally configured to be immediately ready to close again following a trip. With the automatic reset of the Bell Alarm, the tripping solenoid is automatic resetting after the trip unit has tripped. The circuit breaker is immediately ready to close again. For confirmation, the tripped indicator must be reset, either manually on the trip unit or via the remote reset solenoid.
Page 184: Field Installation Of A Reclosing Lockout
10.3 Field Installation of a reclosing lockout To activate the Bell Alarm lockout, the automatic reset must be removed. The tripping solenoid, the tripped indicator and the tripped signal must be reset manually at the breaker. Reclosing of the circuit breaker is blocked until the trip indicator has been reset. DANGER Hazardous voltage....
Page 185: Removing The Automatic Reset Mechanism
10.3.1 Removing the automatic reset mechanism Remove lock washer Remove bolt Remove reset spring Then  (page 9-49) - Install trip unit  (page 23-4) - Install front panel 10 – 4...
Page 186: Installing The Remote Bell Alarm Reset
10.4 Installing the remote Bell Alarm reset NOTICE Can only be used with automatic reclosing lockout reset. The remote reset solenoid will otherwise be overloaded and damaged. 10.4.1 Mounting remote reset solenoid and cut-off switch DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.
Page 187: Connecting Wires
Mounting electrical remote reset solenoid F7 NOTICE When routing the wires, care must be taken to ensure that wires are not damaged when reinstalling the ETU carriage. PZ 1 10.4.2 Connecting wires  (page 8-1) Terminals X8.13 X8.14 3,0 x 0,6 1/8“...
Page 188: Function Test
X5-12 (+) X8-14 (+) X9-8 X9-6 X5-6 X5-10 X5-4 X5-8 Siemens Industry, Inc., Fort Worth, TX 76155 USA Assembled in USA 240 VAC , 10 A / 125 VDC , 0.5 A / 24 VDC , X9-13 0131-FW Voltage Catalog No.
Page 189: Shunt Trip / Closing Coil / Undervoltage Release
Shunt Trip / Closing Coil / Undervoltage release 11.1 Overview Mounting locations 1st shunt trip F1 Signaling switch S22 Closing coil CC 2nd shunt trip F2 or undervoltage release (instantaneous) F3 or undervoltage release (time-delayed) F4 Signaling switch S23 or S43 Cut-off switch S14 for shunt trip 5% duty cycle Cut-off switch S15 for closing coil CC 5% duty cycle 11 –...
Page 190: Installing Shunt Trips, Closing Coils, And Undervoltage Devices
11.2 Installing shunt trips, closing coils, and undervoltage devices DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury.
Page 191: Installing Optional Signaling Switches On Shunt Trips, Closing Coils, And Undervoltage Devices
11.3 Installing optional signaling switches on shunt trips, closing coils, and undervoltage devices Signals the the operating status of the shunt trip, closing coil, or undervoltage device to the BSS. Snap in place Disassembly See-saw Signaling switch Guide Groove Snap-fit Disengage the snap-fit Pull out the signaling switch 11.4...
Page 192: Field Installation Of A Cut-Off Switch For Shunt Trips And Closing Coils
Time-delayed release 3 x 0,5 Delay time 1/8“ = (0.2 ... 1.6 sec.) + 1.6 sec. = 0.2 ... 1.6 sec. 11.5 Field Installation of a cut-off switch for shunt trips and closing coils pre-wired 11 – 4...
Page 193 A Shunt trip with cut-off switch S14 B Closing coil with cut-off switch S15 C Combination of shunt trip and closing coil with combined cut-off switch S14/S15 11 – 5...
Page 194: Mechanical Function Test
11.6 Mechanical function test WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker. Shunt trip Closing coil  Charge the closing spring manually (page 6-4) ...
Page 195: Final Tasks
11.8 Final tasks  (page 23-4) - Install front panel  (page 5-14) - Attach secondary disconnect blocks - Connect wires to secondary disconnect block (page 5-13)  (page 6-2) - Move the draw-out circuit breaker into the test position - Ensure control voltage is connected 11.9 Electrical function test...
Page 196 Shunt trip Undervoltage release  Charge the closing spring (page 6-4)  Closing the circuit breaker (page 6-7) Actuate shunt trip Remote activation Remove control power to test undervoltage release. Circuit breaker opens 11 – 8...
Page 197: Updating The Options Label
X5-12 (+) X8-14 (+) X9-8 X9-6 X5-6 X5-10 X5-4 X5-8 Siemens Industry, Inc., Fort Worth, TX 76155 USA Assembled in USA 240 VAC , 10 A / 125 VDC , 0.5 A / 24 VDC , X9-13 0131-FW Closing coil VAC 50/60 Hz Catalog No.
Page 198: Auxiliary And Control Switches
Auxiliary and control switches (10) Bell Alarm S24  Cut off switch for remote reset solenoid S13 (page 10-5) Signaling switch blown fuse S26  Signaling switch S22 for 1st shunt trip (page 11-3) Signaling switch for ready-to-close S20  Signaling switch S23 for 2nd shunt trip or under-voltage release (page 11-3) Contact position-driven auxiliary switch S1...
Page 199: Installing Internal Auxiliary Switches S1 - S4
12.1 Installing internal auxiliary switches S1 - S4 DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury.
Page 200: Installing The Ready-To-Close Switch S20
12.2 Installing the ready-to-close switch S20 DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 201: Trip Signaling Switches
12.3 Trip Signaling Switches DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 202: Trip Signaling Switches S13, S24, And S26
12.3.1 Trip Signaling Switches S13, S24, and S26 NOTICE Over-tightening the mounting screws may deform the signaling switch and could lead to an incorrect indication  of breaker status. Hardware shall be tightened carefully until the underside of the screw head is flush with the mounting surface. PZ 1 hand tighten S26 assembled with snap-in pins...
Page 203: Control Switches - Connecting Wires
X5-12 (+) X8-14 (+) X9-8 X9-6 X5-6 X5-10 X5-4 X5-8 Siemens Industry, Inc., Fort Worth, TX 76155 USA Assembled in USA 240 VAC , 10 A / 125 VDC , 0.5 A / 24 VDC , X9-13 0131-FW 12 – 6...
Page 204: Mechanism Operated Contacts (Moc)
12.8 Mechanism Operated Contacts (MOC) The circuit breaker may be equipped with an external auxiliary switch assembly. These external auxiliary switches are known as  Mechanism Operated Contacts. In short, the assembly is also referred to as the MOC. The MOC assembly is mounted within the circuit breaker compartment (cradle) and is connected to the main breaker-driveshaft  via a coupler, which is added to the circuit breaker during the MOC installation.
Page 205: Moc Versions
12.8.1 MOC Versions The MOC device may be ordered in two versions for drawout circuit breakers: The auxiliary contacts, in the “Connect Only” version of the MOC, only change state when the circuit breaker is opened/closed while it  is in the “CONNECTED” position within the circuit breaker compartment. There are two distinct models of the “Connect Only” MOC, one  for circuit breaker frame size 2 (WLMOCC) and a second for circuit breaker frame size 3 (WLMOCC3).
Page 206 The coupler snaps onto the end of the steel mainshaft. The steel band should not be removed when installing the coupler. Also ensure  that the coupler is oriented properly when installed. Figure 3 illustrates the proper installed orientation of a shaft extension (circuit breaker shown in the OPEN position), with the tampered flange facing the rear of the circuit breaker..
Page 207 12.8.2.2 Installing the MOC Baseplate Assembly The MOC baseplate assembly is secured to the circuit breaker compartment (cradle) by two tabs in the rear and two screws in the front. With the screws inserted from the inside of the cubicle, and the nuts and lockwashers on the outside, the nuts must be torqued to  71 lbin (8 Nm).
Page 208 12.8.2.3 Removing the Contact Blocks NOTICE MOC Reliability May cause intermittent signaling. All four contact blocks, whether wired or not, must be installed into the MOC assembly to ensure reliable operation. The contact blocks must be removed in order to access the terminals for wiring. The contact blocks should be removed by applying a small amount of outward pressure with a thin blade screwdriver, in the area shown in Figure 6.
Page 209 12.8.2.4 Wiring the Contact Blocks The contact blocks are designated (front of cradle to rear of cradle) S50, S51, S52, and S53. Each contact block contains one “a” and one “b” contact, with the terminal designations as shown below. Each terminal accepts a maximum of one wire, 14 AWG (or smaller), and shall be tightened to 7 lbin (0.8 Nm).
Page 210: Order Numbers
12.8.2.6 Contact Ratings Maximum Current Voltage Continuous Making Breaking 120 VAC 10 A 30 A 240 VAC 10 A 30 A 24 VDC 1.1 A 1.1 A 48 VDC 1.1 A 1.1 A 125 VDC 1.1 A 1.1 A 250 VDC 0.55 A 0.55 A 12.8.3 Order numbers...
Page 211: Combination Of Moc And Mechanical Interlocking Module
12.8.4 Combination of MOC and mechanical interlocking module For the MOC to be combined and operated with the mutual mechanical interlocking module, a special clutch shaft must be used in place  of the normal one. wrench size Longer side turned upwards 13mm 12 Nm 105 lb-in...
Page 212: Motor-Operated Mechanism
Motor-operated mechanism For charging the closing spring automatically.  It is switched on if the closing spring is discharged and control voltage is applied.  The motor-operated mechanism is automatically switched off after the closing spring has been fully charged. 13.1 Installing the motor operator DANGER...
Page 213 Mounting the motor on the operating shaft Operating shaft of the manual operating mechanism Fixing the motor-operated mechanism & connecting wires 3,0 x 0,6 Size Terminals X5.1 (-) X5.2 (+) 6 Nm 53 lb-in 13 – 2...
Page 214: Optional Motor Disconnect Switch On The Front Panel
13.2 Optional motor disconnect switch on the front panel Option. For switching off the motor-operated mechanism control voltage. Supplied pre-assembled with one wire to be soldered . Installing motor disconnect switch S 12 Solder point See-saw Connecting motor disconnect switch - Disconnect the brown wire from the motor-operated mechanism from terminal X5.2.
Page 215: Updating The Options Label
X5-12 (+) X8-14 (+) X9-8 X9-6 X5-6 X5-10 X5-4 X5-8 Siemens Industry, Inc., Fort Worth, TX 76155 USA Assembled in USA 240 VAC , 10 A / 125 VDC , 0.5 A / 24 VDC , X9-13 0131-FW Voltage Power consumption Catalog No.
Page 216: Indicators And Operating Elements
Indicators and operating elements There are additional indicators and operating elements available for field installation. 14.1 Limiting Access to OPEN/CLOSE Buttons This accessory kit allows the access to the OPEN and CLOSE buttons of the circuit breaker to be limited in any combination of the supplied components.
Page 217 Supplied Components:  2x access blocks. Button is only accessible with a 1/8" pin (or smaller) (page 17-2)  2x sealing caps for sealing or attaching a padlock to block the button (page 15-22) Shield to prevent inadvertent operation Mounting plate NOTICE Damage to accessory.
Page 218: Emergency Open Button
14.2 EMERGENCY OPEN button This accessory kit allows the installation of an EMERGENCY STOP mushroom pushbutton above the OPEN button. When depressed, the breaker is opened, and the breaker is held in a trip-free condition until the EMERGENCY STOP mushroom pushbutton is released. NOTICE Damage to accessory.
Page 219: Operations Counter
14.3 Operations counter The operations counter is incremented when the circuit breaker completes the charging cycle (manual or electrically operated). The mechanical operations counter can be installed only if the circuit breaker is equipped with a motor-operated mechanism. PZ 1 Knocking out the fields on the front panel knock out Front panel...
Page 220: Locking Devices
Locking devices 15.1 Key Locks  Padlocking provisions (page 15-16) Key lock Manufacturer Application To activate the locking device, the circuit breaker must be opened. If the circuit breaker is closed, the Breaker-mounted KIRK locking device is blocked. The block is only effective when the key is removed. The key can only be key lock SUPERIOR removed in "OPEN"...
Page 221: Breaker Mounted Key Lock
15.1.1 Breaker mounted key lock DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 222 Knocking out the fields on the front panel knock out deburr Front panel Use a suitable base 3,0 x 0,6 2 Nm 18 lb-in Then  (page 9-49) - Install trip unit  (page 23-4) - Install front panel Key lock Manufacturer Catalog No.
Page 223: Cradle Mounted Key Lock
15.1.2 Cradle mounted key lock DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. When a key is removed, all circuit breakers racked into this cradle will be locked in the open position. ...
Page 224 Components of the key locking device FS II and FS III 3-pole Countersunk head screw M6 with belleville washer and nut (13) Small attachment angle M4 socket head cap screw (must not be used in FS II, fused) (14) 2x M4 socket-head cap screws Pre-assembled skid with guide (15) Spacer (for FS II only)
Page 225 Installing the locks The way in which the locking module unit is installed is the same whether the unit consists of one lock or two locks. Do not use the spacer which may be provided with the key lock. The spacer (5) supplied with the mounting must be used in place of the spacers supplied with the lock.
Page 226 Mounting the skid with guide to the base plate of the cradle PZ 2 3,2 Nm 28 lb-in Base plate of the cradle Mounting the guide on the guide rail PZ 2 3,2 Nm 28 lb-in PZ 2 12 Nm 106 lb-in Frame size II Frame size III and Frame size II 4-pole...
Page 227 Frame size III 4-pole 3,2 Nm 28 lb-in 3,2 Nm 28 lb-in 12 Nm 106 lb-in Step 1. Mounting the plate with lever mechanism to the base plate of the cradle Step 2. Mounting the guide to the attachment angle Step 3.
Page 228 Drilling the hole in the cubicle door Lower edge of door cutout Center of front panel Mounting surface of cradle Hole for first key cylinder Hole for second key cylinder (only if planned) Knocking out the fields on the front panel Knock out the fields on the front panel using a suitable base Deburr the edges Then:...
Page 229 Catalog Numbers Lock & Key for Cradle Mounting Manufacturer Catalog No. Kirk WLDLKRK Single lock Superior WLDSUP Kirk WLDLDKRK Double lock Superior WLDLDSUP Provision-only for Cradle Lock Catalog No. Single Lock Provision WLDLPR Double Lock Provision WLDLDPR Lock & Key for Cradle Mounting FSII 4-pole Manufacturer Catalog No.
Page 230: Installing Racking Handle Key Lock
15.1.3 Installing racking handle key lock When the key is removed, the circuit breaker's racking handle cannot be drawn out, meaning that the circuit breaker cannot be moved into another position. The key lock for the WL Fuse Carriage racking handle cannot be replaced. If damaged, please consult Technical Support. DANGER Hazardous voltage....
Page 231 Pre-assembling the locking module  Installing 15 – 12...
Page 232 Size 5 Nm 45 lb-in Socket head cap screw M5 with washer and nut 15 – 13...
Page 233 Knocking out the field on the front panel Knock out the fields on the front panel using a suitable base Deburr the edges Then:  (page 23-4) - Install front panel Key lock Manufacturer Catalog No. KIRK WLLKCLKRK Circuit-breaker racking handle key lock SUPERIOR WLLKCLSUP 15 –...
Page 234: Installing A Bell Alarm Cover Key Lock
15.1.4 Installing a Bell Alarm cover key lock When the key is removed, the cover cannot be removed and the Bell Alarm cannot be reset. Knock out Push outwards, not inward. Cover with safety lock Trip unit Locking Withdraw key Key lock Manufacturer Catalog No.
Page 235: Padlocking Provisions
15.2 Padlocking provisions  Key Locks (page 15-1) Padlock locking device Application " can be locked with up to 4 padlocks 1/4” diameter. The circuit breaker cannot  OPEN Padlock locking bracket The locking bracket for " OPEN for " "...
Page 236: Padlock Locking The Breaker Open
15.2.1 Padlock locking the breaker OPEN This padlock provision is a standard feature. When the control gate is raised (step 1), the padlock provision can be extended, and padlocks installed. With padlocks installed, this circuit breaker cannot be closed. This provision will support up to four 1/4" diameter padlocks at one time.
Page 237 Mounting padlock locking bracket Latching plate in control gate Then:  (page 23-4) - Install front panel Padlock locking device Catalog No. Padlock locking breaker/OPEN WLLKNP 15 – 18...
Page 238: Padlock Locking Device For Shutter
15.2.2 Padlock Locking device for shutter The shutter can be locked with padlocks. The padlocking provision can be fitted with up to 6 locks with 3/8“ bracket diameter at once. Locking the shutter NOTICE Damage to shutter. Applying too many padlocks may damage the shutter mechanism. The maximum total weight of the padlocks must not exceed 2.2 lbs (1 kg).
Page 239: Padlock Locking Device For Guide Rails
15.2.3 Padlock Locking device for guide rails The cradle is equipped with this locking device as standard. Up to two padlocks can be applied on each side. This prevents a circuit breaker from being inserted into an empty cradle. ; 5/16“ / 8 mm 15.2.4 Padlock Locking device for racking handle Draw-out circuit breakers are equipped with this locking device as standard.
Page 240 Field installation DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker. ...
Page 241: Close/Open Padlock Kit
15.2.6 CLOSE/OPEN padlock kit The manual closing and/or opening of this circuit breaker can be prevented, when this optional accessory is installed. The covers for the CLOSE button and the OPEN button can be fitted with up to three padlocks. With padlocks applied, it is still possible to electrically open and close this circuit breaker.
Page 242 Field installation of sealing cover DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 243: Sealing Covers
Sealing covers Sealing cover for CLOSE button Sealing cover for ETU (electronic trip unit) Sealing cover for OPEN button Sealing cover for CLOSE/OPEN buttons  Field installation of sealing cover (page 15-23) Sealing cover for ETU (electronic trip unit)  Sealing and locking device (page 9-53) 16 –...
Page 244: Mechanical Interlocks
Mechanical interlocks Mechanical interlock Application Access block via CLOSE/OPEN button  The CLOSE/OPEN buttons are each covered in such a way that operation is only possible  (locking set) with a tool. (page 17-2) Cubicle door locking mechanism The cubicle door cannot be opened ...
Page 245: Field Installation Of Close / Open Buttons Blocking Device
17.1 Field installation of CLOSE / OPEN buttons blocking device This interlock limits access to the circuit breaker's manual CLOSE and/or OPEN buttons. The blocking device only allows access to the manual CLOSE and/or OPEN buttons via a small tool (1/8" diameter rod). DANGER Hazardous voltage....
Page 246: Cubicle Door Interlock
17.2 Cubicle door interlock This interlock prevents the cubicle door being opened if the circuit breaker is in the CONNECT position. DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts.
Page 247: Installing The Interlock Mechanism To The Cradle
17.2.1 Installing the interlock mechanism to the cradle Engage tension spring Engage tension spring press + hold Then:  (page 6-1) - Insert the draw-out circuit breaker into the cradle and push it into the disconnected position 17.2.2 Cubicle door interlock drill pattern Centerline of breaker front panel Door cutout for breaker front panel Inner side of cubicle door...
Page 248: Installing Catch On The Cubicle Door
17.2.3 Installing catch on the cubicle door Clip with hole for manual defeat Inner side of cubicle door Catch 2 washers ISO7089 - 5 2 hex nuts M5 17.2.4 Function check - Rack the circuit breaker into the connected position - Close the cubicle door Checking the manual defeat function: Lock position with circuit breaker closed...
Page 249: Interlock To Prevent Racking With Cubicle Door Open
17.3 Interlock to prevent racking with cubicle door open DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.  (page 23-2) - Open and discharge the closing spring ...
Page 250: Coding Between Circuit Breaker And Cradle
Function check  (page 6-1) - Insert the circuit breaker into the cradle and push it into the disconnected position - It must not be possible to draw out the racking handle Mechanical interlock Order No. Locking device against moving the circuit breaker if WLDRLC5UL the cubicle door is open 17.4...
Page 251: Additional Options For The Cradle
Additional options for the cradle 18.1 Shutter The shutter is closed when the draw-out circuit breaker is in disconnect position or outside the cradle.  (page 15-19) The shutter can be fixed in a closed position and protected against unauthorized opening by means of padlocks. Shutter Locking strap Locking device...
Page 252: Field Installation
18.1.1 Field installation DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. NOTICE Damage to accessory. Over-tightening the mounting screws may strip the plastic frame, or damage components, rendering the accessory unusable. Hardware shall be tightened carefully until the underside of the screw head is flush with the mounting surface.
Page 253 The following is the bill of material and tools required to install the shutter. Bill of material Shutter subassembly (1 unit) Socket head cap screws M6x10 with locking coating (8 units) Shutter spring assemblies (4 units) Tools required ¼ inch slotted-type screwdriver 5 mm hex socket screwdriver Torque wrench with 5 mm hex socket bit 18 –...
Page 254 Slider Assembly Inspect the shutter mechanism. Check for shipping damage. Check that screws are tight and that the shutter mechanism moves freely when opening. Danger label Position the shutter subassembly as shown. Notice that the danger label was placed on top. Carefully position shutter subassembly into cradle.
Page 255 90° angle, that the front tines (6) are straight and parallel and that the center guide pin is firmly in place at the front and rear, as shown. If deficiencies are found, please contact SIEMENS Technical Support.
Page 256 Front tines 2x locating dowel pins Installing the four shutter spring assemblies. Place each spring assembly tine into cradle cut-outs, first by inserting rear tines. Twist the assembly towards the side wall of the cradle. Ensure that the locating dowel pins are seated, and front tines are inserted through the side wall. Do not apply excessive force to the white trumpets when inserting the tines through the side walls;...
Page 257 Size 3,5 Nm 31 lb-in Using a hexagon socket screwdriver (or equivalent), screw the shutter spring assemblies and the shutter subassembly together. When setting the screws in place, hold the shutter steady by its corners. Tighten the 8 screws with 31 lb-in ±10%. Torque wrench for tightening torque 31 lb-in ±...
Page 258: Catalog Numbers
Carry out a final check to ensure that the shutter is functioning. Open the shutter. Do not apply excessive force to sliding mechanism. To avoid damage to Locking mechanism feature Fold back and latch the wings of the locking device to avoid damage of the shutter while inserting and in racking of the  circuit breaker.
Page 259: Truck Operated Contacts - Toc (Cradle Accessory)
18.2 Truck Operated Contacts - TOC (Cradle Accessory) DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. The cradle can be retrofitted with truck-operated contacts (TOC). These optional accessories allow the customer to evaluate the position of the circuit breaker in the cradle....
Page 260 Circuit breaker postion and TOC contact state Circuit breaker position Switch Terminal Designation Points Disconnect position Test position Connected position S31 / S32 S33 / S34 / S35 TOC Config.3 S30 / S31 / S32 S33 / S34 /S35 Contact open Contact closed 18 –...
Page 261 Installation Depending on spatial conditions in the switchgear assembly, it may be necessary to wire the TOC prior to installation. Then:  (page 6-1) - Insert the circuit breaker into the cradle and rack it into the connected position Catalog numbers TOC Version Catalog No.
Page 262: Mechanical Circuit Breaker Interlocking
Mechanical circuit breaker interlocking NOTE For proper function of the interlocking device, the following minimum prerequisites have to be met: Bowden cables are to be laid out as straight and as unbowed as possible. Bending radii of the Bowden cables must exceed > 20" (500 mm). The total curvature of the Bowden cable must not exceed 540 degrees.
Page 263: General Notes
19.1.1 General notes Output 1 Holes with press nut for socket head cap screw M6 with washer for the configuration of the mechanical circuit breaker interlocking Non-interchangeable brackets Input 1 Input 2 Output 2 In the following configuration instructions, the following designations apply: : Output signal 1 : Input signal 1 : Circuit breaker 1...
Page 264: Mechanical Interlocking Two Sources (Open Transition)
19.1.2 Mechanical interlocking two sources (open transition) The two sources are interlocked to prevent paralleling (open transition). Example Possible circuit breaker states Description: A circuit breaker can be closed only if the other is open. Materials required: Each circuit breaker has an interlocking module and a Bowden cable. ...
Page 265: Mechanical Interlocking Two Sources With A Tie Circuit Breaker (Open Transition)
19.1.3 Mechanical interlocking two sources with a tie circuit breaker (open transition) The two sources are interlocked to prevent paralleling (open transition). Example Possible circuit breaker states Description: Any two circuit breakers can be closed, with the third being interlocked. Materials required: Each circuit breaker has an interlocking module and a Bowden cables.
Page 266: Mechanical Interlocking Feeder Circuit Breakers (Single Load, Open Transition)
19.1.4 Mechanical interlocking feeder circuit breakers (single load, open transition) The feeder breakers are interlocked so that only one feeder may be closed at a time. Example Possible circuit breaker states Description: When one circuit breaker is closed, the other two cannot be closed. Materials required: Each circuit breaker has an interlocking module and a Bowden cable.
Page 267: Mechanical Interlocking Three Sources (Open Transition To Standby System)
19.1.5 Mechanical interlocking three sources (open transition to standby system) The standby system is mechanically interlocked with the two source circuit breakers to prevent paralleling the standby system with either or both primary source(s). Example Possible circuit breaker states Description: Two circuit breakers (S ) can be independently opened and closed, the third (S ) being ready to close only if the other two are open.
Page 268: Mechanical Interlocking Source And Tie Circuit Breaker (Open Transition To Standby System)
19.1.6 Mechanical interlocking source and tie circuit breaker (open transition to standby system) The standby system is mechanically interlocked with the tie circuit breaker to prevent paralleling with primary source. Example Possible circuit breaker states Description: One circuit breaker (S ) can be opened and closed independently of the two others.
Page 269: Installing Interlocking Module
19.2 Installing interlocking module WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker. - Switch off and discharge the closing spring  (page 23-2) - Remove the breaker from the cradle ...
Page 270 For frame size III, draw out version: mechanical interlocking module with ringg Hold NOTE Working through step 9, the intermediate shaft must engage in a hole inside the circuit breaker. Only then it will be possible - working through step 10 - to fit the support for the intermediate shaft in the guide of the side wall. 19 –...
Page 271 Function check Then:  (page 23-4) - Fit back front panel and side cover on the right, if it was removed 19 – 10...
Page 272: Fitting Interlocking Module
19.2.2 Fitting interlocking module Note If there isn't enough free space for installation on the right side of the circuit breaker inside the cubicle, it may be advantageous to   (page 19-12) pre-assemble the Bowden cables on the output side before fitting the interlocking module. Mechanical interlocking module (2) (3) Size...
Page 273: Mounting The Bowden Cables
19.2.3 Mounting the Bowden cables Fitting Bowden cable on output site Securing the Bowden cable R > 20” (500 mm) Installing the Bowden cable at the input of the circuit breaker to be interlocked 19 – 12...
Page 274 Steel index clip Adjusting the Bowden cable Then: - According to the planned configuration of the circuit breaker interlocking, screw socket head cap screws with toothed lock Configurations (page 19-1) washers, respectively plastite-screws with lock washers into the associated index clips if applicable - Insert the draw-out circuit breaker into the cradle, push into disconnected position, close the cubicle door if required and rack it ...
Page 275: Function Check
19.2.4 Function check - Close the cubicle doors  (page 6-4) - Charge closing spring of circuit breakers to be interlocked - Test the various possibilities of the planned interlocking configuration one after the other - Re-adjust Bowden cables if necessary Then: ...
Page 276: Arc Chute Covers
Arc chute covers The arc chute cover is available as an optional accessory for cradles. The cover is provided to protect the breaker from larger foreign objects (e.g. tools). 20.1 Field installation DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device.
Page 277 Frame size II Size Size PH 2 8 Nm 71 lb-in 3,2 Nm 28 lb-in Socket head cap screw M6x20 Self-tapping screw M4 x10 Socket head cap screw M6x20 Frame size III For frame size III, installation is essentially the same, but the steps 6 to 9 can be omitted, since the related part is already installed. 20 –...
Page 278: Catalog Numbers
20.2 Catalog numbers Frame size Catalog No. WLGARC2 Arc chute cover for cradle WLGARC3 WL4GARC2 Arc chute cover for cradle (4-pole) WL4GARC3 *) Not available for FS II fused circuit breakers **) Not available for FS III M-class 20 – 3...
Page 279: Door Sealing Frame
Door sealing frame Dimension drawing of door cutout Front view of the cubicle door Mounting surface of the cradle Center of breaker front panel Eight mounting holes for the door sealing frame 21 – 1...
Page 280 Installing the door sealing frame NOTICE Catalog No. Door sealing frame WLDSF Not for use with fuse carriages. 21 – 2...
Page 281: Plexiglas Breaker Cover
Plexiglas breaker cover NOTE Following a short circuit interruption, check that the Plexiglas breaker cover is firmly in place and the seal is maintained. Dimension drawing for door cutout and mounting holes Center of breaker front panel 4 mounting holes for hinges Mounting surface of circuit breaker or cradle 22 –...
Page 282 Attaching the Plexiglas cover Cubicle door with door cutout Plexiglas cover Hinge pin 2 hinges with opening function (right and left) 8 x Socket head cap screws M5 with washer and lock nuts Installation of the right side hinge in the same fashion. Handling: To open the Plexiglas cover, push the hinge pins on the left or right hinge together or, to remove the Plexiglas cover, unlock both hinges....
Page 283: Maintenance
Maintenance DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment/property damage. Turn off and lock out all power supplying this device before working on this device. Only qualified personnel should work on this equipment, after becoming thoroughly familiar with all warnings, safety notices, and maintenance procedures contained herein and on the devices....
Page 284: Preparation For Maintenance
23.1 Preparation for maintenance 23.1.1 Opening the circuit breaker and discharging the closing spring OPEN the circuit breaker Secondary Disconnects Position Indicator Disconnect secondary circuits green CLOSE the circuit breaker Depress the OPEN button again Indications 23 – 2...
Page 285: Removing The Circuit Breaker From The Cradle
23.1.2 Removing the circuit breaker from the cradle Crank the circuit breaker into the disconnected position  (page 6-3) - Unlock racking handle / withdraw racking handle Stop Position indicator blue green Push in the racking handle NOTICE Racking Handle Damage. Turning the racking handle beyond the stop will cause damage to the racking mechanism.
Page 286: Changing Front Panel
23.2 Changing front panel DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. WARNING High speed moving parts. Can cause serious personal injury. Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Page 287: Checking Arc Chutes
23.3 Checking arc chutes It is recommended that the arc chutes be inspected on a regular basis.The arc splitter plates erode as the result of load breaking. This constitutes normal wear. The erosion of the arc splitter plates can manifest itself as wear of the plates, a layer of soot, or small spots of collections of molten metal.
Page 288: Removing Arc Chutes
arc chutes 23.3.1 Removing For Frame Size II: For Frame Size III: PH 2 Loosen screw by approx. 15 mm; do not remove it;  FS III and FS II, class C:  remove screw completely Push the cover back; FS III: lift the cover carefully Remove the cover Take out the arc chute...
Page 289: Installing Arc Chutes
arc chutes 23.3.3 Installing PH 2 For frame size III PH 2 23 – 7...
Page 290: Catalog Numbers
Frame size II and frame size III PH 2 10 Nm 89 lb-in Insert arc chute, push cover back if necessary Slide the cover into place Check position of the 2 screens, FS III only Hook the cover carefully into place and fold it down, FS III only Insert the screw and tighten to the specified torque 23.3.4 Catalog numbers Interrupting class...
Page 291: Inspection Of Arc Chute Covers
23.4 Inspection of arc chute covers The arc chute cover is available as an optional accessory for cradles. DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. In addition to the arc chute inspection, an inspection of the arc chute covers is also recommended.
Page 292: Checking Contact Erosion
23.5 Checking contact erosion It is strongly recommended that the breaker's internal contacts be inspected on a regular basis. Load breaking and short-circuit trips cause contact erosion. The WL circuit breaker is equipped with a contact erosion indicator for monitoring wear of the circuit breaker's internal contacts.
Page 293: Replacing The Circuit Breaker Internal Contact Assemblies
 23.6 Replacing the circuit breaker internal contact assemblies If the circuit breaker's internal contacts need to be replaced following an inspection, this can be done using the following procedure. When replacing the circuit breaker's internal contacts, it is recommended that all three poles be replaced at the same time. It is also required that the arc chutes be replaced when the breaker internal contacts be replaced at the same time.
Page 294: Removing Front Panel
23.6.1 Removing front panel PH 2 23.6.2 Removing arc chutes  (page 23-6) 23.6.3 Removing vertical adapter Size 5 mm 0640-3  (page Removing lower contact supports in FS II 23-20). 23.6.4 Removing pole assemblies Mounting actuating shaft retainer NOTICE Damage to the operator mechanism.
Page 295 Remove hole plug Press contacts together and hold them while completing steps 3, 4 and 5 Actuating shaft retainer PH 2 5 Mount and fix main shaft retainer Removing racking shaft  (page Strip off the driving collar of the spring dump mechanism when extracting the racking shaft 23-21).
Page 296 Removing current sensors Lay circuit breaker on its side Remove cover of cable duct Detach connectors Size 5 mm Remove current sensor covers Remove current sensors Frame size II: unhook the circuit breaker feet Size 4 mm Loosen only Place circuit breaker in upright position, remove both circuit breaker feet, remove screw Only loosen these screws 23 –...
Page 297 Frame size III: Remove circuit breaker feet NOTE Before removing the screws, support circuit breaker in such a way that the circuit breaker feet are not supporting the weight of the  circuit breaker. Leave this area open Suitable support circuit breaker here Circuit breaker feet...
Page 298 Size 5 mm 23 – 16...
Page 299: Installing Pole Assemblies
Removing lower moving contacts Clean and grease bearings and coupling bolts before assembly. (Grease: Isoflex Topas NB 52, Fa. Klüber Lubrication München KG) Support connecting bars Push out coupling bolt Remove coupling bolt Remove pole assemblies 23.6.5 Installing pole assemblies Installing upper fixed contacts in rear wall Size 5 mm...
Page 300 Installing rear wall (First remove supports for pole assemblies) WARNING Loss of overcurrent protection. Pinching or crimping of the current sensor cable harness may result in loss of overcurrent protection. Lay the cable harness carefully and do not pinch or crimp the wires. Insert end position retaining springs Inspect to ensure that the coupling bolts are centered...
Page 301 Attaching the circuit breaker feet Size 4 mm 10 Nm 89 lb-in Installing current sensors All upper screws All lower screws Size Size 5 mm 5 mm 5 Nm 10 Nm 45 lb-in 89 lb-in Lay circuit breaker on its side, insert connecting wire Insert current sensors Reposition sensor covers and attach...
Page 302 For frame size II only: Fit support for the lower contacts together with the sensor covers All upper screws Size 5 mm 5 Nm 45 lb-in All lower screws Size 5 mm 10 Nm 89 lb-in Frame size II, 3200 A Frame size II, 800 - 2000 A Establish plug connections WARNING...
Page 303 to ETU current current current sensor L1 sensor L2 sensor L3 Attach cable chanel cover Removing the main shaft retainer PH 2 Place circuit breaker in an upright position, press and hold the contacts together, through steps 2 and 3 Unscrew the main shaft retainer Remove the main shaft retainer Remove the actuator...
Page 304: Adjusting The Contact Wear Indicator
Insert racking shaft Mount crank Secure crank 23.6.6 Adjusting the contact wear indicator  (page 6-4) - Charge the closing spring manually  (page - Close 6-7)) screwdriver 10 mm / 3/8‘‘ blade 0071-2 Indicator pin Indicator pin before adjustment Indicator pin adjusted Using a screwdriver, cut the plastic indicator pin along the upper edge of the large recess.
Page 305: Attaching The Vertical Adapter
23.6.7 Attaching the vertical adapter Size 10 mm 70 Nm 70 Nm 50 ft-lb 0640-4 50 ft-lb *) For frame size II, 800 - 2000 A only Version A Version B NOTICE Damage to finger clusters. Incorrect adjustment of the vertical connections on the circuit breaker may cause damage to the finger cluster assemblies when the circuit breaker is racked into the cradle.
Page 306 Frame size II NOTE To achieve correct finger cluster position in frame size II, center the vertical adapter of the center pole (phase B) on the copper connector of the frame and tighten it. Shift the vertical adapters (7) of the outer poles (phase A & B) outwards until the specified distance of 5 1/4" is reached, and tighten them.
Page 307 Frame size III NOTE To achieve correct finger cluster position in frame size III, center the vertical adapter of all poles on the copper connector of the frame. Hex-head screw M12 x 80 Belleville washer Washer M12 nut Vertical adapter Finger cluster Reinforced bend of the inner finger clusters can be adjusted as desired....
Page 308: Order Numbers
23.6.8 Order numbers For the noted finger clusters, the finger cluster edge guard should be oriented away from the center pole(s) of the circuit breaker.  For interior poles (i.e. B-phase, and 4-pole A-phase), the orientation is insignificant. Adjustment of reinforced bend of internal fingerclusters open Breaker internal contact assembly:...
Page 309: Attaching The Front Panel
23.6.9 Attaching the front panel PH 2 2,5 Nm 22 lb-in 23.6.10 Installing the arc chutes When the breaker internal contacts are replaced, it is also necessary to replace the arc chutes. See Installing arc chutes (page 23-7). 23.6.11 Mechanical function test ...
Page 310: Exchanging The Primary Disconnects
23.7 Exchanging the primary disconnects DANGER Hazardous voltage. Will cause death, serious personal injury, or equipment damage. Turn off and lock out all power supplying this device before working on this device. Finger cluster Stab tip 23.7.1 Exchanging the finger cluster ...
Page 311: Catalog Numbers
NOTE Ensure, that the shoulder bolt has free play in the slotted holes of the brass bracket of the finger cluster. Lubricating the finger clusters Clean and grease finger contacts on both ends (between stab tip and finger cluster, and between vertical adapter and finger cluster) before assembly.
Page 312: Exchanging The Stab Tip
23.7.3 Exchanging the stab tip Stab tip Socket head cap screw M6 Hex-head screw M12 8 Nm Size 71 lb-in 5 mm 70 Nm 50 ft-lb Size 10 mm 0649-4 FS III only: 0649-3 Size 8 mm 6x Socket head cap screw M10x40 (40Nm /28ft-lb) and belleville washer Stab tip bridge Vertical bus connector 23 –...
Page 313: Catalog Numbers
23.7.4 Catalog numbers Frame size Max. circuit breaker rated current Catalog No. n max 800 / 1600 WLGST10163LL Stab tip line 2000 WLGST15203LL 3200 WLGST30323LL 800 / 1600 WLGST10163LL (2 bolt hole pattern) 800 / 1600 WLGST10163LD (4 bolt hole pattern) Stab tip load 2000 WLGST15203LL...
Page 314: Cleaning And Greasing The Circuit Breaker
23.8 Cleaning and greasing the circuit breaker Finger cluster Greasing points Wipe away old grease and apply new grease 23 – 32...
Page 315 Cradle (1,2) Greasing points opposite side accordingly Clean the track of the rails and relubricate the designated points Grease Catalog No. Isoflex Topas NB52 manufactured by Klüber Lubrication WLBGREASE München KG 23 – 33...
Page 316: Technical Data
227/209/152 227/209/152 1) Maintenance means: replacing main contacts and arc chutes (see operating instructions)  M-Class main contacts can be replaced by Siemens personnel only. 2) Short-time Withstand Current I at 635VAC is 85 kAIC RMS 3) max. 600 V AC...
Page 317 Short-time current Icw (kA RMS) 1 sec. 1) Maintenance means: replacing main contacts and arc chutes (see operating instructions)  M-Class main contacts can be replaced by Siemens personnel only. 2) Short-time Withstand Current I at 635VAC is 85 kAIC RMS 3) max.
Page 318 1 x AWG 14 terminal Maintenance consists of replacing main contacts and arc chutes (see operating instructions.) M-Class main contacts can be replaced by Siemens personnel only. For use only with ring terminals supplied by Siemens (WL10RL). Fused circuit breaker weights...
Page 319 WL Circuit Breaker Accessory Ratings Manual-operating mechanism with Mechanical Closing Closing/charging the closing spring Maximum actuating force required on hand 52 lbs lever Number of hand lever strokes required Motor-operating mechanism with Mechanical and Electrical Closing Charging the closing spring Closing solenoid and Shunt Trip Coil voltage tolerance 24V DC...
Page 320 WL Circuit Breaker Accessory Ratings Auxiliary Contacts and Mechanism Operated Contacts (MOC) Alternating current  Contact rating Rated operational voltage 240 V 50/60 Hz Rated operational current, continuous Rated operational current, making Rated operational current, breaking Direct current Rated operational voltage 24 V, 125 V, 250 V Rated operational current, continuous Rated operational current, making...
Page 321 WL Circuit Breaker Accessory Ratings Truck Operated Contacts (TOC) Alternating current  Contact rating Rated operational voltage 120 V 50/60 Hz Rated operational current, continuous 10 A Rated operational current, making Rated operational current, breaking Direct current Rated operational voltage 24 V 24 V, 48 V, 125 V 250 V Rated operational current, continuous...
Page 322 WL Circuit Break er F unction ov er vie w of the electronic tr ip units Basic F unctions ETU745 Long-time ov ercurrent pro tection F unction can be switched ON/OFF – Se tting range I R = I n x … 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.8, 0.9, 1 Switch-selectable ov erload p rot ection...
Page 323 WL Circuit Breaker Function overview of the electronic trip units Parameter sets Selectable between – – Communication Communication capability via Metering function Metering function capability with Metering Function or Display by LED Trip unit active Alarm ETU error L trip S trip I trip (only with ground fault module)
Page 324 WL Circuit Break er F unction ov er vie w of the electronic tr ip units Basic functions ETU748 ETU776 Long-time ov ercurrent pro tection F unction can be switched ON/OFF – – Se tting range I R = I n x … 0.4, 0.45, 0.5, 0.55, 40-100% of In (Adjustable in Amps ) 0.6, 0.65, 0.7, 0.8,...
Page 325 WL Circuit Breaker Function overview of the electronic trip units Parameter sets Selectable between parameter set A and B – LCD, alphanumeric (4-line) – – Communication CubicleBUS integrated Communication capability via MODBUS or PROFIBUS Metering function Metering function capability with Metering Function or Metering Function PLUS Display by LED...
Page 326: Abbreviations
Abbreviations Set current for ground fault protection Output signal (mechanical interlocking module) Alternating current AMP Incorporated, Harrisburg ANSI American National Standard Institute American Wire Gauge Set current for ground-fault protection Breaker Data Adapter Breaker Status Sensor Set current for ground-fault protection Closing coil COM15 Communication interface...
Page 327 Delay time-current relationship based on formula I t = constant I-tripping Instantaneous tripping (short-circuit) Operating value for load shedding Operating value for load restore Rated operational short-circuit breaking capacity Rated ultimate short-circuit breaking capacity Rated short-time withstand current Identification number International Electrotechnical Commission Current setting value for G-tripping Current setting value for I-tripping...
Page 328 S50 ... S53 MOC (external auxiliary switches) Contact position-driven auxiliary switch Contact position-driven auxiliary switch S-tripping Short-time delayed tripping SIGUT Siemens trademark for aux. termination technique Shunt trip T.U. ERROR Trip unit error TEST Test position Delay time for G-tripping Truck operated cell switch (S30 …...
Page 329 Voltage transformer WAGO WAGO Kontakttechnik, München Terminal designation according to DIN Zone Selective Interlocking Present average of current Long term average of current avglt Distortion factor of current Distortion factor of voltage 25 – 4...
Page 330: Glossary
Circuit breakers feature an automatic reset of the tripping solenoid. No manual resetting of the Trip Unit is required to  place the circuit breaker in a ready-to-close state. UL 1066 circuit breakers are factory-fitted with this automatic reset feature as standard. ...
Page 331 Motor-operated mechanism The geared motor charges the closing spring automatically as soon as voltage is applied to the auxiliary connections. After closing,  the closing spring is automatically charged for the next closing operation. Position indicator To show the circuit breaker position in the cradle. Rated current coding The rated current is coded at the factory, i.e.
Page 332: Index
Index Abbreviations ........25-1 Opening the circuit breaker .
Page 334 Siemens Industry, Inc. Norcross, GA 30092 Technical assistance: 1-800-241-3138 www.usa.siemens.com/powerdistribution Version No.: CBIM-02000-0814...

Siemens UL 1066 Operating Instructions Manual

1 Overview

2 Labels

3 Standard Specifications

4 Packing and Lifting

5 Installation

6 Commissioning

7 Frame Sizes / Dimension Drawings

8 Circuit Diagrams

9 Electronic Components

10 Reset the Reclosing Lockout and the Bell Alarm

11 Shunt Trip / Closing Coil / Undervoltage Release

12 Auxiliary and Control Switches

13 Motor-Operated Mechanism

14 Indicators and Operating Elements

15 Locking Devices

16 Sealing Covers

17 Mechanical Interlocks

18 Additional Options for the Cradle

19 Mechanical Circuit Breaker Interlocking

20 Arc Chute Covers

21 Door Sealing Frame

22 Plexiglas Breaker Cover

23 Maintenance

24 Technical Data

25 Abbreviations

26 Glossary

27 Index

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Summary of Contents for Siemens UL 1066