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Siemens SINOVA Manual

3wj air circuit breakers
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  • Page 2 3WJ Air Circuit breakers Introduction Description SINOVA Accessories Inspection & Maintenance Circuit Breakers 3WJ Air Circuit breakers Technical specifications Troubleshooting Operating Instructions Disposal ESD guidelines List of abbreviations 12/2022 L1V30828903001-01...
  • Page 3 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.

  • Page 4: Table Of Contents

    Table of contents Introduction ............................6 Technical support ........................ 6 Safety instructions ....................... 7 Standards ..........................8 Transport ..........................8 Description ............................10 Mechanical components ....................10 2.1.1 Design ..........................10 2.1.1.1 Circuit Breaker ........................10 2.1.1.2 Guide frame ........................12 2.1.2 Circuit Breaker identification ....................
  • Page 5 Table of contents Accessories ............................56 Overview ........................... 56 Preparatory and concluding installation steps for the installation of internal accessories ..57 Control and signaling accessories ..................60 3.3.1 Overview ........................... 60 3.3.2 Closing coil, shunt trip and undervoltage release ..............61 3.3.2.1 Installation ........................
  • Page 6 Table of contents Inspection & Maintenance ......................... 165 General ........................... 165 Safety regulations ......................167 Planning of inspection and maintenance ................168 4.3.1 Inspection interval ......................168 4.3.2 Scope ..........................168 4.3.3 Logging ........................... 170 Performing inspection ...................... 171 4.4.1 General ...........................

  • Page 7: Introduction

    The Circuit Breakers are designed to be operated in enclosed rooms in which the operating conditions are not affected by dust or corrosive vapors/gases. Suitable enclosures must be used in dusty or damp conditions. Technical support You can find further support on the Internet (https://www.siemens.com/support-request). 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 8: Safety Instructions

    Introduction 1.2 Safety instructions Safety instructions DANGER Hazardous voltage Will cause death, serious personal injury, or equipment damage. During operation, parts of the device or system are carrying hazardous electrical voltage. Improper handling of the device or system can result in death or serious injury, as well as significant material damage.

  • Page 9: Standards

    1.3 Standards Standards The 3WJ Circuit Breakers comply with the following standards: • IEC 60947-2 • EN 60947-2 See also https://support.industry.siemens.com/ (https://support.industry.siemens.com/) Transport Long-term storage • Seal the plastic film. • Check the packaging regularly. Unpacking and storing the Circuit Breaker Unpack the Circuit Breaker and make sure that it was not damaged during transportation.
  • Page 10 Introduction 1.4 Transport Transportation with crane Circuit Breaker fixed Circuit Breaker withdrawable Guide frame Breakers / No. of Weight for reference poles 3WJ11 / 3 ≤35 kg ≤38 kg ≤23 kg 3WJ11 / 4 ≤48 kg ≤51 kg ≤28 kg 3WJ12 / 3 ≤60 kg ≤63 kg...

  • Page 11: Description

    Description Mechanical components 2.1.1 Design 2.1.1.1 Circuit Breaker 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 12 Description 2.1 Mechanical components (1) Arc chute (12) Draw-out window (2) Accessory label (13) Position indicator (3) Carrying handle (14) Position for CASTELL lock (4) Counting indicator (15) Electronic trip unit (ETU) (5) Store-energy spring indicator (16) Mechanical OPEN button (6) Type label (17) Mechanical CLOSED button (7) Ready-to-close indicator...

  • Page 13: Guide Frame

    Description 2.1 Mechanical components 2.1.1.2 Guide frame ① Opening for crane hook ⑧ Locking device for racking rail ② Crane hook label ⑨ Racking rail ③ Shutter (option) ⑩ Locking device shutter (option) ④ Type label ⑪ Shutter lever (option) ⑤...

  • Page 14: Circuit Breaker Identification

    Description 2.1 Mechanical components 2.1.2 Circuit Breaker identification 2.1.2.1 Accessory and rating label Circuit Breaker accessory label (with terminal assignments) ① Order no. of the Circuit breaker ⑥ Motor operating mechanism ② Supplement order no. of the further configured options ⑦...
  • Page 15 Description 2.1 Mechanical components Circuit Breaker rating label ① Order no. of the Circuit breaker ⑧ Country of production ② ID of the Circuit breaker ⑨ Rated short-time withstand current ③ Standards ⑩ Rated short-circuit breaking capacity ④ Utilization category ⑪...

  • Page 16: Indicators Of The Circuit Breaker

    Description 2.1 Mechanical components 2.1.3 Indicators of the Circuit Breaker 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 17: Operation

    Description 2.1 Mechanical components 2.1.4 Operation 2.1.4.1 Installation WARNING Risk of equipment damage and/or personal injury Before installing the Circuit breaker, make sure that the minimum distances from insulated, grounded, and live components in the switchgear are observed. Details can be found in the chapter Technical specifications (Page 196). Installation position WARNING Risk of equipment damage and/or personal injury...
  • Page 18 Description 2.1 Mechanical components Installation on a horizontal surface For fixed-mounted Circuit Breakers: Supplied by customer: 4 x M8-8.8 bolts + strain washers For withdrawable Circuit Breakers: Supplied by customer: 4 x M8-8.8 bolts + nuts + washers Arc chute cover If several withdrawable Circuit Breakers are arranged one above the other in cubicles without compartment bases, we recommend to use arc chute covers.

  • Page 19: Racking The Circuit Breaker In Or Out

    Description 2.1 Mechanical components 2.1.4.2 Racking the Circuit Breaker in or out NOTICE Material damage due to over-rotation of the racking handle The withdrawable Circuit Breaker must only be racked once the operator panel has been mounted and secured. If a shutter is installed, a change of direction is not permitted while the Circuit Breaker is being racked until a defined position has been reached (disconnected/test/connected position).
  • Page 20 Description 2.1 Mechanical components Racking in • Slide the guide rails out completely. • Move the Circuit Breaker back into the guide frame. • Press the OPEN button and open the slide switch simultaneously. • Insert crank handle and turn it to rack the Circuit breaker in. Rack into test position. Rack further into connect position.
  • Page 21 Description 2.1 Mechanical components • Remove crank handle and close the slide switch. The slide switch for racking on the front of the Circuit Breaker is lockable by a padlock with diameter 6 to 8 mm. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 22: Position Of The Circuit Breaker In The Guide Frame

    Description 2.1 Mechanical components 2.1.4.3 Position of the Circuit Breaker in the guide frame Diagram Position and display Main and auxiliary circuit Cubicle door Shutter Maintenance position The auxiliary terminals of the breaker are outside of the Open Closed auxiliary connector blocks of the guide frame.

  • Page 23: Removing The Circuit Breaker From The Guide Frame

    Description 2.1 Mechanical components 2.1.4.4 Removing the Circuit Breaker from the guide frame Removing the Circuit Breaker To remove the Circuit Breaker from the guide frame you have to: 1. Slide out the guide rails 2. Lift the Circuit Breaker up and then remove it forward. Interlocking device Block the shutter before installing the interlocking device.

  • Page 24: Inserting The Circuit Breaker Into The Guide Frame

    Description 2.1 Mechanical components 2.1.4.5 Inserting the Circuit Breaker into the guide frame Note If present, remove locking devices before inserting the Circuit Breaker into the guide frame. • Pull out the guide rails • Insert the Circuit breaker by moving it forward and then down onto the guide rails. •...

  • Page 25: Closing And Opening

    Description 2.1 Mechanical components Manually charging the stored-energy spring Actuating force Number of strokes Stored-energy spring is charged 1. Fully grasp the charging handle. 2. Execute five strokes evenly and completely to the stop. Execute the fifth stroke just as far and evenly as the first four strokes, although the actuating force will increase (see graphic above).
  • Page 26 Description 2.1 Mechanical components Closing and opening without motor 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 27 Description 2.1 Mechanical components Closing and opening with motor 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 28 Description 2.1 Mechanical components Indicator status Without motor operating mechanism: Open, Discharged With motor operating mechanism: Open, Charged With motor operating mechanism, tripping by ETU: Open, Charged, "Ready to Close" is not OK Without motor operating mechanism: Closed, Discharged With motor operating mechanism after approx. 20s: Closed, Charged 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 29: Commissioning Checklist

    Description 2.1 Mechanical components 2.1.4.7 Commissioning checklist Checks and work to be carried out Before commencing work on the device, observe the instructions in Chapter Safety instructions (Page 7). 1. Open the circuit breaker and discharge the stored-energy spring. 2. Insert the crank handle (for withdrawable circuit breakers). 3.

  • Page 30: Connection

    Description 2.1 Mechanical components 2.1.5 Connection 2.1.5.1 Main connections DANGER Hazardous voltage. Will cause death, serious personak injury or equipment damage The fastening screws above and below the connection bars on the back of the guide frame are voltage-carrying. Before commencing maintenance work, ensure that no voltage is present on the power distribution equipment and make sure that this condition is maintained while work is being performed (according to EN 50110-1, DIN VDE 0105-100 and BGV A2).
  • Page 31 Description 2.1 Mechanical components Vertical connection Fixed-mounted breaker The following examples show the 3-pole circuit breaker: Frame size I: • ≤ 1250 A, S class • 1600 A, N class Frame size II: • 2000 A • 2500 A • 3200 A Vertical terminals left and right asymmetrical Frame size II:...
  • Page 32 Description 2.1 Mechanical components Guide frame The following examples show the 3-pole guide frame: Frame size I: • ≤ 1250 A, S class • 1600 A, N class Frame size II: • 2000 A • 2500 A • 3200 A Vertical terminals left and right asymmetrical Frame size II: •...
  • Page 33 Description 2.1 Mechanical components Available connection variants Fixed-mounted breaker The following examples show the 3-pole Circuit Breaker and the available connection variants: Guide frame The following examples show the 3-pole guide frame and the available connection variants: 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 34 Description 2.1 Mechanical components Cleaning and supporting the main connections Cleaning the main connection Cleaning the copper bars Main connection mounting material Terminal screws with strain washers (internal diameter = 12 mm acc. to DIN 6769-Fst) Recommended tightening torque 70 Nm Required screw strength 8.8 according to DIN 267 3WJ Air Circuit breakers...
  • Page 35 Description 2.1 Mechanical components Supporting the main connection The following pictures show you how to support the main connections for horizontal and vertical connections for withdrawable and fixed-mounted Circuit Breakers. Left Horizontal connection Right Vertical connection Figure 2-1 Withdrawable circuit breaker Left Horizontal connection Right Vertical connection...

  • Page 36: Secondary Disconnect Terminals

    Description 2.1 Mechanical components 2.1.5.2 Secondary disconnect terminals Assembly of secondary disconnect terminals (fixed-mounted Circuit Breakers) • Assemble the coding elements and attach the secure brackets to the secondary disconnect terminal. • Assemble the secondary disconnect terminal and the coding pieces on the breaker with steps ①...
  • Page 37 Description 2.1 Mechanical components Wiring The following pictures show you how to do the wiring at fixed-mounted Circuit Breakers (left) and withdrawable Circuit Breakers (right). The following table displays the possible wire diameters. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 38 Description 2.1 Mechanical components Routing of the cables from the secondary disconnect terminals fixed-mounted withdrawable Note Cable routing Only route the cables as shown in the pictures above. Make sure to route the cables sideways. Secure them with cable ties on withdrawable Circuit Breakers. Note Potential wire damage Do not install cables in the highlighted areas of the following pictures.

  • Page 39: Connecting The Protective Conductor

    Description 2.1 Mechanical components Article No. for spare part Description Article No. Secondary disconnect terminal for fixed-mounted Circuit Breakers 3WJ9111-0AB01 2x coding elements 2x secure brackets Secondary disconnect terminal for guide frame 3WJ9111-0AB02 2.1.5.3 Connecting the protective conductor Fixed-mounted Circuit Breaker The following picture shows where to connect the protective conductor at the fixed-mounted Circuit Breaker.

  • Page 40: Electronic Components

    Description 2.2 Electronic components Electronic components 2.2.1 Electronic Trip Unit (ETU) - functional overview NOTICE We have checked the content of this manual to ensure that it is consistent with the hardware and software described. Discrepancies cannot be wholly excluded, however, which means that we cannot assume responsibility for the correctness of the information provided here.
  • Page 41 Description 2.2 Electronic components Overview of functions Electronic trip unit Functions ETU350WJ ETU360WJ LT: Overload protection (Long time), L-tripping ✓ ✓ Thermal memory can be switched on/off — — ST: Short-time delay short-circuit protection (Short time), S-tripping ✓ ✓ Short-time can be switched ON/OFF —...

  • Page 42: Etu350Wj

    Description 2.2 Electronic components 2.2.2 ETU350WJ ① Alphanumerical display ② Indicator: Fault in overcurrent release ③ Indicators: Reason for tripping The reason for tripping is stored for at least two days provided that the electronic trip unit was active for at least 20 minutes prior tro tripping. ④...
  • Page 43 Description 2.2 Electronic components NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket. Before the protective cap is removed, the breakers must be connected to ground, and the operators must have the same potential. Protection functions •...
  • Page 44 Description 2.2 Electronic components With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 45: Etu360Wj

    Description 2.2 Electronic components 2.2.3 ETU360WJ ① Alphanumerical display ② N-conductor protection ON/OFF ③ Indicator: Fault in overcurrent release ④ Indicators: Reason for tripping The reason for tripping is stored for at least two days provided that the electronic trip unit was active for at least 20 minutes prior tro tripping.
  • Page 46 Description 2.2 Electronic components ⑬ Rotary coding switch: Value for short-time delay/short-circuit trip ⑭ Rotary coding switch: Value for overload trip ⑮ Indicator: Overcurrent release activated ⑯ Indicator: Overload alarm NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket.
  • Page 47 Description 2.2 Electronic components L, S, I, N tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve.
  • Page 48 Description 2.2 Electronic components G tripping operation Due to the activation limits of 150 A (FSI) and 200 A (FSII), a ground fault response value of 100 A cannot be ensured with a one-phase load. In this case, the minimum response value is = 300 A.

  • Page 49: Indicators On The Etu

    Description 2.2 Electronic components 2.2.4 Indicators on the ETU The indicators provided depend on the electronic trip unit type. Electronic trip unit is activated I > I 150 A for frame size I 200 A for frame size II Overcurrent alarm Continuous light, if I ≥...
  • Page 50 Description 2.2 Electronic components Protection function has tripped (overcurrent) • Indicator lights up when the "QUERY" button is pressed • Only one reason for tripping is displayed • Only the last reason for tripping is displayed T.U. ERROR LED 1st T.U. Error flashes: The protection function is restricted;...

  • Page 51: Protection Functions

    Description 2.2 Electronic components 2.2.5 Protection functions 2.2.5.1 Basic protection functions The protection functions of the electronic trip unit are available without an additional auxiliary voltage. The required energy is supplied via current transformers integrated in the Circuit Breaker. To evaluate the currents, the RMS value is calculated by the electronic components of the electronic trip unit.

  • Page 52: St: Short-Time Delay Short-Circuit Release (Short Time), S Tripping

    Description 2.2 Electronic components 2.2.5.3 ST: Short-time delay short-circuit release (Short time), S tripping With the electronic trip units, tripping caused by a short-circuit current I can be delayed by This enables selectivity with respect to short-circuit protection in switchgear with more than one grading level.

  • Page 53: Gf: Ground-Fault Protection (Ground-Fault), G-Tripping

    Description 2.2 Electronic components 2.2.5.5 GF: Ground-fault protection (Ground-fault), G-tripping If the electronic trip unit is equipped with a ground fault protection function, this can protect consumers against excessive ground fault currents. Ground fault detection can be implemented by means of vectorial summation of the currents of the external conductors and N conductor.

  • Page 54: Menus On The Displays Of The Etu350Wj And Etu360Wj

    Description 2.2 Electronic components 2.2.7 Menus on the displays of the ETU350WJ and ETU360WJ You can switch from one menu to another by pressing the menu button briefly (< 1 s). The following consecutive menu displays can be selected: Current in phase L1 Current in phase L2 Current in phase L3 Current in neutral conductor...
  • Page 55 Description 2.2 Electronic components The reason for tripping is displayed during a tripping operation. LT tripping operation ST tripping operation INST tripping operation N tripping operation (for ETU360WJ only) Ground-fault tripping (for ETU360WJ only) 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 56: Recommissioning After Opening Operation By Electronic Trip Unit

    Description 2.2 Electronic components 2.2.8 Recommissioning after opening operation by electronic trip unit 1. Find the reason for the tripping of circuit breaker by pushing the button "QUERY" on the ETU. 2. Identify the cause and resolve the issue. – Check downstream load. –...

  • Page 57: Accessories

    Accessories Overview Version specific For closing operation ① Spring charging motor -M ② Closing coil -Y1 For opening operation ③ Shunt trip -F1 ④ Shunt trip -F2 ⑤ Tripping solenoid -F5 For monitoring ⑥ Auxiliary switch for switching position indication -S1 ... S6, S60, S61 ⑦...

  • Page 58: Preparatory And Concluding Installation Steps For The Installation Of Internal Accessories

    Accessories 3.2 Preparatory and concluding installation steps for the installation of internal accessories For interlocking ⑬ Reclosing lockout -F5 with tripped signaling contact -S11 ⑮ Pushbutton "OPEN" (mechanical) ⑯ Pushbutton "CLOSED" (mechanical) Preparatory and concluding installation steps for the installation of internal accessories This chapter describes the accessories available for the 3WJ Air Circuit Breaker.
  • Page 59 Accessories 3.2 Preparatory and concluding installation steps for the installation of internal accessories Opening the circuit breaker and discharging the stored-energy spring 1. Check that the circuit breaker is ready to close ("OK" indication) and the stored-energy spring is charged ("CHARGED" indication). 2.
  • Page 60 Accessories 3.2 Preparatory and concluding installation steps for the installation of internal accessories Note Withdrawable circuit breakers First close the racking hole, then remove the operator panel. Installation • Pull the spring-charging lever down • Put the operator panel onto the Circuit Breaker Note Withdrawable circuit breakers First close the racking hole, then install the operator panel.

  • Page 61: Control And Signaling Accessories

    Accessories 3.3 Control and signaling accessories Control and signaling accessories 3.3.1 Overview Mounting location ① Closing coil CC (Y1) ④ First auxiliary switches 2NO + 2NC (S2,S1) ② Second trip ST (F2) ⑤ Second auxiliary switches 2NO + 2NC (S6,S5) or Second auxiliary switches 3NO + 1NC (S60,S5) or Second auxiliary switches 4NO (S60,S61) ③...

  • Page 62: Closing Coil, Shunt Trip And Undervoltage Release

    Accessories 3.3 Control and signaling accessories 3.3.2 Closing coil, shunt trip and undervoltage release Closing coil (CC) The closing coil makes remote closing of the circuit breaker possible. The prerequisite for this is the ready-to-close status of the circuit breaker. Remote closing can take place by means of electrical signals on the secondary disconnect terminal system.
  • Page 63 Accessories 3.3 Control and signaling accessories Undervoltage release (UVR/UVR-t) The undervoltage release trips the circuit breaker if the control voltage U is unavailable or drops to between 70% and 35% of its normal value (in compliance with the relevant standard) and locks it to prevent reclosing until the auxiliary voltage is restored. The circuit breaker can then be reclosed mechanically or electrically.
  • Page 64 Accessories 3.3 Control and signaling accessories Closing coil (CC) Rated control supply voltage U 24 V DC 110 … 127 V AC / 110 … 125 V DC 220 … 240 V AC / 220 … 250 V DC Operating range (acc. to IEC 60947-2) 85 ...
  • Page 65 Accessories 3.3 Control and signaling accessories Shunt trip (ST) Rated control supply voltage U 24 V DC 110 … 127 V AC / 110 … 125 V DC 220 … 240 V AC / 220 … 250 V DC Operating range (acc. to IEC 60947-1) 85 ...
  • Page 66 Accessories 3.3 Control and signaling accessories Undervoltage release (UVR/UVR-t) Rated control supply voltage U 24 ... 30 V DC 110 … 127 V AC / 110 … 125 V DC 220 … 240 V AC / 220 … 250 V DC 380 …...

  • Page 67: Installation

    Accessories 3.3 Control and signaling accessories 3.3.2.1 Installation Mounting location Installation process Setting the delay time of the Undervoltage release 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 68: Part Number

    Accessories 3.3 Control and signaling accessories See also Terminal connection diagram of secondary disconnect terminals (Page 198) 3.3.2.2 Part number Closing coil (CC) / Shunt trip (ST), continuous duty Part number DC 24 V 3WJ9111-0AD01 110 ... 127 V AC / 110 ... 125 V DC 3WJ9111-0AD05 220 ...

  • Page 69: Counting Mechanism

    Accessories 3.3 Control and signaling accessories 3.3.3 Counting mechanism Article No. Description Article No. 5-digit operating cycles counter 3WJ9111-0AH04 Check the contents of the packaging ① Counting mechanism, complete ② DIN 7991 countersunk screw M6 x 16 - 8 ③ Conical nut Preparatory work 1.
  • Page 70 Accessories 3.3 Control and signaling accessories Installing the counting mechanism Installing the display window • Place the operator panel onto a wooden board (make sure that it is in full contact with the surface) near the outline to be cut out. •...

  • Page 71: Monitoring Switches And Signaling Accessories

    Accessories 3.4 Monitoring switches and signaling accessories Installing the operator panel See chapterPreparatory and concluding installation steps for the installation of internal accessories (Page 57) Monitoring switches and signaling accessories 3.4.1 Position signaling switch for guide frame Article No. Description Article No.
  • Page 72 Accessories 3.4 Monitoring switches and signaling accessories Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2. Rack the Circuit Breaker into maintenance position (disconnected postion) and remove it from the guide frame (only withdrawable Circuit Breakers). 3.

  • Page 73: Accessories For Main Connections

    Accessories 3.5 Accessories for main connections Connecting the position signaling switch Circuit diagrams Accessories for main connections 3.5.1 Connection bars for guide frame (frame size I) Article No. Description Article No. Vertical connection for guide frame Size I, up to 1000 A, S class 3WJ9111-0AV11 3WJ9111-0AV12 Size I, up to 1250 A, S class...
  • Page 74 Accessories 3.5 Accessories for main connections Check the contents of the packaging Vertical connections Horizontal connections Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2. Rack the Circuit Breaker into maintenance position (disconnected postion) and remove it from the guide frame (only withdrawable Circuit Breakers).
  • Page 75 Accessories 3.5 Accessories for main connections Installing the connection bars 1. Remove any present connection bars. To do so, unscrew the fixing screws and remove the connection bars from the finger clusters. Throw the removed connection bars into the trash. 2.
  • Page 76 Accessories 3.5 Accessories for main connections 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 77: Connection Bars For Guide Frame (Frame Size Ii)

    Size II, 2500 A, 3P 3WJ9111-0AX23 Size II, 2500 A, 4P 3WJ9111-0AX24 Size II, 3200 A, 3P 3WJ9111-0AX25 Size II, 3200 A, 4P 3WJ9111-0AX26 = Only available with initial order and installation by Siemens modification center. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 78 Accessories 3.5 Accessories for main connections Check the contents of the packaging Vertical connection Horizontal connection 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 79 Accessories 3.5 Accessories for main connections Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2. Rack the Circuit Breaker into maintenance position (disconnected postion) and remove it from the guide frame (only withdrawable Circuit Breakers). 3. Remove the operator panel and the secondary disconnect terminals. See chapter Preparation for maintenance work (Page 178) Installing the connection bars 1.
  • Page 80 Accessories 3.5 Accessories for main connections 2. Insert the new connection bars and secure them by means of the enclosed screws and strain washers. If present, install the shutter again. NOTICE Position of finger clusters Insert finger clusters only in the position shown in the pictures below. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 81: Vertical Connections For Fixed-Mounted Circuit Breaker

    Size II, 3200 A, 3P 3WJ9111-0AM25 Size II, 3200 A, 4P 3WJ9111-0AM26 Size II, 4000 A, 3P 3WJ9111-0AM31 Size II, 4000 A, 4P 3WJ9111-0AM32 = Only available with initial order and installation by Siemens modification center. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 82 Accessories 3.5 Accessories for main connections Check the contents of the packaging Frame size I Frame size II Note Please order the number of connecting bars as required for the application. Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2.
  • Page 83 Accessories 3.5 Accessories for main connections Installing the connection pieces (frame size I) Place the connection piece ① or ② on the connection bar ⑫ as shown and secure by means of a hexagon socket-head screw ⑦ or ⑧, strain washer ⑪ and hexagon nut ⑩ (tightening torque: 70 ±...

  • Page 84: Accessories For Secondary Disconnect Terminals

    Accessories 3.6 Accessories for secondary disconnect terminals Place the connection pieces ③ and ④ or ⑤ and ⑥ on the connection bar ⑫ as shown and secure by means of a hexagon socket-head screw ⑧ or ⑨, strain washer ⑪ and hexagon nut ⑩...
  • Page 85 Accessories 3.6 Accessories for secondary disconnect terminals Base part for secondary disconnect terminals To connect the base part, insert the blade connectors of the corresponding accessory into the base part. Then install the base part to the Circuit breaker. Manual connector and coding kit for secondary disconnect terminals Connection of secondary disconnect terminals 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 86: Secondary Disconnect Terminals For Withdrawable Circuit Breakers

    Accessories 3.6 Accessories for secondary disconnect terminals Installation of blank cover 3.6.2 Secondary disconnect terminals for withdrawable Circuit breakers The secondary disconnect terminal for the withdrawable circuit breaker comprises: • Sliding disconnect secondary contact modules for guide frame • Base part for secondary disconnect terminal •...

  • Page 87: Accessories For The Electronic Trip Unit

    Accessories 3.7 Accessories for the Electronic Trip Unit Sliding disconnect secondary contact modules for guide frame Installation of the other accessory components for the secondary disconnect terminals corresponds to that of the fixed-mounted circuit breakers, see Chapter Secondary disconnect terminals for fixed-mounted Circuit breakers (Page 83). Connection of secondary disconnect terminals Accessories for the Electronic Trip Unit 3.7.1...
  • Page 88 Accessories 3.7 Accessories for the Electronic Trip Unit Article No. Description Article No. Manual function tester for electronic trip unit 3WL9111-0AT32-0AA0 View ① LED for indicating the operating voltage ② Control keys ③ 6 LEDs for indicating the test results Preparatory work •...
  • Page 89 Accessories 3.7 Accessories for the Electronic Trip Unit Connection Note Malfunctions and incorrect test results can occur if the connection sequence is not followed. ① Test socket on the electronic trip unit ② Cable with SUB D (40 pole) (hand-held test device) to plug connector (40 pole) ③...
  • Page 90 Accessories 3.7 Accessories for the Electronic Trip Unit Switching the line voltage Operation When the power supply is connected, the status test starts automatically with the querying of different electronic trip unit components and parameters. If the status test is successful, the "ETU STATUS"...
  • Page 91 Accessories 3.7 Accessories for the Electronic Trip Unit Result of the N transformer test If the LED flashes (1 s ON, 1 s OFF), this signals a fault with the measuring transformer of the neutral conductor. This might be because a measuring transformer has not been installed (e.g.

  • Page 92: External Transformer For Neutral Conductors (For Etu360Wj)

    Accessories 3.7 Accessories for the Electronic Trip Unit Activating the electronic trip unit To activate the electronic trip unit, press "N" and "G" simultaneously. The electronic trip unit remains active until you press a different button. This function can be used, for example, to test the signaling of the "T.U. Error" LED if the status test ended with the fault "Electronic trip unit defective".
  • Page 93 Accessories 3.7 Accessories for the Electronic Trip Unit External transformer for neutral conductors ① Version for plant-side copper bar ② Mounting bracket ③ M6 bolt with washers and nut ④ Version with copper connection elements ⑤ Connection P2 ⑥ Connection P1 Assignment of connections This assignment ensures that the current in the Circuit Breaker and external N transformer flows in the same direction.
  • Page 94 Accessories 3.7 Accessories for the Electronic Trip Unit External transformer for neutral conductors - dimension drawings Without copper bars, Left: FSI, right: FSII With copper bars, Top: FSI, bottom: FSII 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 95: Retrofitting The Internal N Transformer

    Accessories 3.7 Accessories for the Electronic Trip Unit 3.7.3 Retrofitting the internal N transformer Article No. Description Article No. Internal current transformer for neutral conductor, Size I 3WJ9111-0AA14 Internal current transformer for neutral conductor, Size II 3WJ9111-0AA15 Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2.
  • Page 96 Accessories 3.7 Accessories for the Electronic Trip Unit Retrofitting the Internal current transformer for neutral conductor • Remove the secondary disconnect terminal X6 • Remove the connecting plates at X6-13 and X6-14 • Remove the electronic trip unit (for details, see Testing of settings and inspection of the electronic trip unit (Page 175)).
  • Page 97 Accessories 3.7 Accessories for the Electronic Trip Unit • Install the internal current transformer for neutral conductor as shown below • Install the ETU again and wire the current transformer as shown below (for details, see Testing of settings and inspection of the electronic trip unit (Page 175)). 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 98: Conversion Sets - Fixed-Mounted Circuit Breakers To Withdrawable Circuit Breakers

    Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Article No. Description Article No. Conversion set from fixed-mounted Size I, up to 1600 A, 3P 3WJ9111-0BC11 to withdrawable version Size I, up to 1600 A, 4P 3WJ9111-0BC12 Size II, up to 4000 A, 3P...
  • Page 99 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2. Remove the operator panel and the secondary disconnect terminals. See chapterPreparation for maintenance work (Page 178) Removing the operator panel See chapter Preparatory and concluding installation steps for the installation of internal accessories (Page 57)
  • Page 100 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Installation of the positioning actuator • Push the angle brackets over the ends of the shaft with positioning actuator and attach to the bottom of the Circuit Breaker housing. •...
  • Page 101 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Preparing the operator panel • Place the operator panel on a stable surface near the outline to be cut out. • Use a hammer and screwdriver to cut out the groove base from the pre-pressed groove. •...
  • Page 102 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Coding of the circuit breaker and guideframe To prevent the insertion of a Circuit breaker with different breaking capacity into a guide frame, you must code the Circuit breaker and matching guide frame as shown below. •...
  • Page 103 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Coding scheme Breaking capacity; max. Circuit breaker coding Guide frame coding rated current e-d-c-b-a E-D-C-B-A Up to 1250 A 1600 A FSII Up to 2000 A 2500 A 3200 A 4000 A Replacement/installation of the control slider...
  • Page 104 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers • If present, the plastic control slider must be replaced by the metal control slider in this package. Installation of the metal control slider • Place the control slider spring with the center eye in the control slider. •...
  • Page 105 Accessories 3.8 Conversion sets - fixed-mounted Circuit Breakers to withdrawable Circuit Breakers Attaching the adhesive label and updating the Circuit breaker front label Stick the label onto the front of the operator panel. Updating the front label: Change the 11th digit of the MLFB according to the table below by using a permanent marker: Installing the operator panel Preparatory and concluding installation steps for the installation of internal accessories...

  • Page 106: Accessories For Locking And Interlocking

    Accessories 3.9 Accessories for locking and interlocking Accessories for locking and interlocking 3.9.1 Safety locking device Article No. Description Article No. Safety locking device instead of the OPEN button 3WJ9111-0BA35 Check the contents of the packaging ① Safety lock ② Black ring ③...
  • Page 107 Accessories 3.9 Accessories for locking and interlocking Installing the safety locking device • Remove the white ring of the OPEN button. Counter-rotate the OPEN button a little, then remove the OPEN button. • Attach the black ring and hold it in position. Insert the safety lock and rotate it clockwise to the correct position.

  • Page 108: Mounting Set For 3Wj Lock Or Castell Lock

    Accessories 3.9 Accessories for locking and interlocking Functional check 1. Check the installation position of the safety lock as shown in the picture. Correct if needed 2. Turn the key clockwise to the locking position. 3. Remove the key. The Circuit Breaker cannot be put into OPEN state when in this position. 3.9.2 Mounting set for 3WJ lock or CASTELL lock Article No.
  • Page 109 Accessories 3.9 Accessories for locking and interlocking Check the contents of the packaging ① control slider (metal) ② control slider spring ③ Lock washer ④ Latch with threaded pin ⑤ Hexagon socket-head screw with spring washer A6 ⑥ Housing ⑦ Seal Note Additional components...

  • Page 110: 3Wj Lock (Set), 3 Locks With 2 Keys

    Accessories 3.9 Accessories for locking and interlocking See also Preparation for maintenance work (Page 178) 3WJ lock (set), 3 locks with 2 keys (Page 109) 3.9.3 3WJ lock (set), 3 locks with 2 keys Article No. Description Article No. 3WJ lock (set), 3 locks with 2 keys 3WJ9111-0BA43 Check the contents of the package ①...
  • Page 111 Accessories 3.9 Accessories for locking and interlocking Setup package for 3WJ lock (set) Check the contents of the package ① Control slider (metal) ② Control slider spring ③ Lock washer ④ Latch with threaded pin ⑤ Hexagon socket-head screw with spring washer A6 ⑥...
  • Page 112 Accessories 3.9 Accessories for locking and interlocking Removing the operator panel Before installing the 3WJ lock you have to remove the operator panel. The procedure is shown in chapter Preparatory and concluding installation steps for the installation of internal accessories (Page 57) Replacement/installation of the control slider •...
  • Page 113 Accessories 3.9 Accessories for locking and interlocking • Secure the control slider spring with the lock washers • Install the electronic trip unit. When doing so, make sure that you do not trap any cables. Preparing the operator panel • Place the operator panel on a stable surface near the outline to be cut out. •...
  • Page 114 Accessories 3.9 Accessories for locking and interlocking Preparing the 3WJ lock and installing it in the housing If present: Remove the key. 1. Attach the latch as far as it will go onto the square section of the lock. 2. Secure the latch by means of a threaded pin. 3.
  • Page 115 Accessories 3.9 Accessories for locking and interlocking Installing the housing on the circuit breaker Place the housing with installed lock into the clips on the front side of the operating mechanism. The locking pin must audibly engage. Installing the operator panel To finish the installation of the lock you must attach the operator panel again.
  • Page 116 Accessories 3.9 Accessories for locking and interlocking Functional check While pressing the OFF button, turn the key clockwise to the locking position. • Remove the key • The Circuit Breaker cannot close when in this position. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 117: Door Interlock

    Accessories 3.9 Accessories for locking and interlocking 3.9.4 Door interlock 3.9.4.1 Door interlock for fixed-mounted Circuit Breaker Article No. Description Article No. Door interlock for fixed-mounted Circuit Breaker 3WJ9111-0BB12 Check the contents of the packaging Preparatory work • Open the Circuit Breaker and discharge the stored energy spring. •...
  • Page 118 Accessories 3.9 Accessories for locking and interlocking Installing the interlocking module • Attach the interlocking module to the front of the Circuit Breaker and secure it with the hexagon screw and washer. • Attach the tension spring to the lever of the breaker shaft. Insert the tension spring with lug behind the geared motor.
  • Page 119 Accessories 3.9 Accessories for locking and interlocking Install the catch in the cabinet door • Drill holes with a diameter of 5.5 mm in the cabinet door. • Screw on the catch (tightening torque for component: 0.4 Nm). ① Center of operator panel ②...

  • Page 120: Door Interlock For Guide Frame

    Accessories 3.9 Accessories for locking and interlocking 3.9.4.2 Door interlock for guide frame Article No. Description Article No. Door interlock for withdrawable Circuit Breaker 3WJ9111-0BB13 Check the contents of the packaging Preparatory work • Open the Circuit Breaker and discharge the stored energy spring. •...
  • Page 121 Accessories 3.9 Accessories for locking and interlocking Installing the bolt in the guide frame • Place the bolt on the cross member of the guide frame and attach the tension spring to the bolt. • Rotate the bolt below the metal shaft in front of the cross member and attach the tension spring to the hole ④.
  • Page 122 Accessories 3.9 Accessories for locking and interlocking Install the catch in the cabinet door 1. Drill holes with a diameter of 5.5 mm in the cabinet door. 2. Screw on the catch (tightening torque for component: 0.4 Nm). ① Center of operator panel ②...
  • Page 123 Accessories 3.9 Accessories for locking and interlocking The pictures below show the functional check of the locking mechanism. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 124: Mechanical Interlock

    Accessories 3.9 Accessories for locking and interlocking 3.9.5 Mechanical interlock 3.9.5.1 Information about mechanical interlock Note To ensure that the interlock works properly, the following minimum requirements must be fulfilled by the switchgear: 1. Bowden wires must be laid so that they are as straight as possible. 2.
  • Page 125 Accessories 3.9 Accessories for locking and interlocking If the output information 1 of Circuit Breaker 1 is interconnected with the input information 2 of Circuit Breaker 2, for example, the following abbreviations are used: The statuses of the Circuit Breakers are indicated on the operator panel as fol- lows: Circuit Breaker CLOSED Circuit Breaker OPEN and not ready to CLOSE (interlocked)
  • Page 126 Accessories 3.9 Accessories for locking and interlocking Configuration: Three Circuit Breakers stacked Description: Any two Circuit Breakers can be closed at any time, with the third interlocked. Required equipment: Each Circuit Breaker is equipped with an interlocking module and a Bowden wire. Three additional Bowden wires must be ordered separately.
  • Page 127 Accessories 3.9 Accessories for locking and interlocking Configuration: Three Circuit Breakers stacked Description: When one Circuit Breaker is closed, the other two cannot be closed. Required equipment: Each Circuit Breaker is equipped with an interlocking module and a Bowden wire. Three additional Bowden wires must be ordered separately.
  • Page 128 Accessories 3.9 Accessories for locking and interlocking Configuration: Three Circuit Breakers back to back Description: Two Circuit Breakers can be closed/opened independently of each other, with the third only ready to be closed when the other two are open. If the third Circuit Breaker is closed, the other two cannot be closed.
  • Page 129 Accessories 3.9 Accessories for locking and interlocking Configuration: Three Circuit Breakers, of which two are back to back Description: One Circuit Breaker can be closed/opened independently of the other two. The two other Circuit Breakers are mutually exclusive, that is, one can only be closed when the other is open.

  • Page 130: Mechanical Interlock Of Fixed-Mounted Circuit Breakers

    Accessories 3.9 Accessories for locking and interlocking 3.9.5.2 Mechanical interlock of fixed-mounted Circuit Breakers Article No. Description Article No. Mutual mechanical interlock for fixed-mounted Circuit Breaker 3WJ9111-0BB21 Check the contents of the packaging Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2.
  • Page 131 Accessories 3.9 Accessories for locking and interlocking Note If the mechanical interlock is already installed, continue with "Information about mechanical interlock". - See chapter Information about mechanical interlock (Page 123) Preparations Preparing the operator panel (frame size I) Break out the groove base from the pre-pressed grooved as displayed in the image below. Preparing the mounting plate (frame size I) Loosen the screws of the mounting plate with 3 or 4 turns each as shown in the image below.
  • Page 132 Accessories 3.9 Accessories for locking and interlocking Removing the spring-charging motor and 2nd auxiliary switches (frame size I) If present, remove an installed spring-charging motor as shown below. If present, remove the 2nd auxiliary switches as shown below. Removing the auxiliary shaft and cover Remove the auxiliary shaft and the cover as shown in the images below.
  • Page 133 Accessories 3.9 Accessories for locking and interlocking Installing the auxiliary shaft and the clutch in the Circuit Breaker Insert the auxiliary shaft and fix it with screws and washer as shown in the images below. Add the clutch (5) and secure cover (6) to fix the clutch. For framesize I also fix the screws of the mounting plate again.
  • Page 134 Accessories 3.9 Accessories for locking and interlocking 5. Secure by means of cylinder-head screws and strain washers (tightening torque: 8 ± 1 Nm). 6. Attach the interlocking module to the fixed-mounted plate. 7. Secure by means of cylinder-head screws and strain washers (tightening torque: 8 ± 1 Nm). Installing Bowden wire See chapter Installing Bowden wire (Page 138) 3WJ Air Circuit breakers...

  • Page 135: Mechanical Interlock Of Withdrawable Circuit Breakers

    Accessories 3.9 Accessories for locking and interlocking 3.9.5.3 Mechanical interlock of withdrawable Circuit Breakers Article No. Description Article No. Mutual mechanical interlock for withdrawable Circuit Breaker 3WJ9111-0BB22 Check the contents of the packaging Preparatory work 1. Open the Circuit Breaker and discharge the stored-energy spring. 2.
  • Page 136 Accessories 3.9 Accessories for locking and interlocking Preparations Preparing the operator panel (frame size I) Break out the groove base from the pre-pressed grooved as displayed in the image below. Preparing the mounting plate (frame size I) Loosen the screws of the mounting plate with 3 or 4 turns each as shown in the image below.
  • Page 137 Accessories 3.9 Accessories for locking and interlocking Removing the spring-charging motor and 2nd auxiliary switches (frame size I) If present, remove an installed spring-charging motor as shown below. If present, remove the 2nd auxiliary switches as shown below. Removing the auxiliary shaft and cover Remove the auxiliary shaft and the cover as shown in the images below.
  • Page 138 Accessories 3.9 Accessories for locking and interlocking Installing the auxiliary shaft and the clutch in the Circuit Breaker Insert the auxiliary shaft and fix it with screws and washer as shown in the images below. Add the clutch (5) and secure cover (6) to fix the clutch. For framesize I also fix the screws of the mounting plate again.

  • Page 139: Installing Bowden Wire

    Accessories 3.9 Accessories for locking and interlocking Installing Bowden wire Installing Bowden wire (Page 138) See also Preparation for maintenance work (Page 178) 3.9.5.4 Installing Bowden wire Article No. Description Article No. Bowden wire (2 m) 3WJ9111-0BB41 Bowden wire (3 m) 3WJ9111-0BB42 Bowden wire (4.5 m) 3WJ9111-0BB43...
  • Page 140 Accessories 3.9 Accessories for locking and interlocking • Push the tube holder into the plate ⑪. • Bend the nose of the plate with pliers to secure the tube holder ⑫. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 141 Accessories 3.9 Accessories for locking and interlocking Installing the Bowden wire Bowden wires must be installed in a way that they are not bent excessively (large bending radii). Secure Bowden wires by means of cable ties . Minimum permissible bending radius: R = 50 mm. This bending radius is only permitted a maximum of six times for each Bowden wire.

  • Page 142: Accessories For Integration In The Power Distribution Equipment

    Accessories 3.10 Accessories for integration in the power distribution equipment 3.10 Accessories for integration in the power distribution equipment 3.10.1 Door sealing frame IP41 Articel no. Description Article No. Door sealing frame 3WJ9111-0AP01 Check the contents of the package 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 143 Accessories 3.10 Accessories for integration in the power distribution equipment Preparing the switchgear door Center of the operator panel Installation of the door sealing frame 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 144: Protective Cover Ip55

    Accessories 3.10 Accessories for integration in the power distribution equipment 3.10.2 Protective cover IP55 Article No. Description Article No. Protective cover with plastic hinges 3WJ9111-0AP03 Check contents of the package Dimension drawing for door cutout and mounting holes 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 145: Arc Chute Cover

    Accessories 3.10 Accessories for integration in the power distribution equipment Mounting the protective cover ① Cubicle door with door cutout ② Protective cover ③ 6 x Hexagon socket-head screw M5 with washers and safety nuts ④ Hinges with opening function (right and left) Function 3.10.3 Arc chute cover...
  • Page 146 Accessories 3.10 Accessories for integration in the power distribution equipment Article No. Description Article No. Withdrawable Circuit breaker Arc chute cover Size I, 3P 3WJ9111-0AP41 Size I, 4P 3WJ9111-0AP43 Size II, 3P 3WJ9111-0AP42 Size II, 4P 3WJ9111-0AP44 Fixed-mounted Circuit breaker Arc chute cover Size I, 3P 3WJ9111-0AP45...
  • Page 147 Accessories 3.10 Accessories for integration in the power distribution equipment Preparatory work • Open the Circuit Breaker and discharge the stored energy springs • Disconnect auxiliary circuits • Rack the Circuit Breaker into maintenance position (disconnected position) and remove it from the guide frame (only withdrawable Circuit Breakers).
  • Page 148 Accessories 3.10 Accessories for integration in the power distribution equipment 3. Put the insert nuts into the back side of the circuit breaker as shown in the picture below. 4. Re-install the arc chutes on the outsides of the fixed-mounted circuit breaker. 5.

  • Page 149: Shutters

    Accessories 3.10 Accessories for integration in the power distribution equipment 8. Attach the arc chute cover with four M6 screws and washers. 9. Fix the arc chute cover to the rear side of the Circuit breaker and the previously installed insert nuts with two M6 screws and washers, 3.10.4 Shutters...
  • Page 150 Accessories 3.10 Accessories for integration in the power distribution equipment Preparatory work • Open the Circuit Breaker and discharge the stored energy spring. • Disconnect auxiliary circuits. • Rack the Circuit Breaker to maintenance position and remove from the guide frame. See chapter Preparation for maintenance work (Page 178) 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 151 Accessories 3.10 Accessories for integration in the power distribution equipment Installation of the shutter - Frame size I • Check if the control mechanism is properly installed. To do so, pull out the guiding rails and snap the control mechanism into place. •...
  • Page 152 Accessories 3.10 Accessories for integration in the power distribution equipment • Insert the upper and lower cover. • Screw the hook onto the guiding rails. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 153 Accessories 3.10 Accessories for integration in the power distribution equipment Installation of the shutter - Frame size II • Check if the control mechanism is properly installed. To do so, pull out the guiding rails and snap the control mechanism into place. •...
  • Page 154 Accessories 3.10 Accessories for integration in the power distribution equipment • Insert the upper and lower cover. • Screw the hook onto the guiding rails. Functional check 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 155 Accessories 3.10 Accessories for integration in the power distribution equipment Locking the shutter: frame sizes I and II Note The following options are available: • Both shutters closed • The top shutter open • The lower shutter open • Both shutters open Two padlocks are required here for each shutter.

  • Page 156: Phase Barrier

    Accessories 3.10 Accessories for integration in the power distribution equipment 3.10.5 Phase barrier The phase barrier is an accessory of the Circuit Breaker which is used for phase short circuit isolation. It provides necessary guide slots and installs fixed interface on the rear wall of the fixed-mounted Circuit Breaker and guide frame.

  • Page 157: Phase Barrier For Fixed-Mounted Circuit Breaker

    Accessories 3.10 Accessories for integration in the power distribution equipment 3.10.5.1 Phase barrier for fixed-mounted Circuit Breaker Article No. Description Article No. Phase barrier for fixed-mounted Circuit Breaker, Size I, 3P 3WJ9111-0AP51 Phase barrier for fixed-mounted Circuit Breaker, Size I, 4P 3WJ9111-0AP53 Phase barrier for fixed-mounted Circuit Breaker, Size II, 3P 3WJ9111-0AP52...
  • Page 158 Accessories 3.10 Accessories for integration in the power distribution equipment Installation - Frame size I • Remove the arc chutes and store them securely. Note Equipment damage Risk of damage to the arc chutes. Do not stand the arc chutes vertically on the insulation walls, but lay them on the side •...
  • Page 159 Accessories 3.10 Accessories for integration in the power distribution equipment • Remove the fasteners of the corresponding CT cover. • Use an allen wrench to attach the socket cap screw and clamping washer with the clips to the bottom part of rear side of the Circuit breaker. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 160 Accessories 3.10 Accessories for integration in the power distribution equipment • Insert the phase barrier, which is fixed in the correct position when you hear the "click" sound. The audible clicking into place ensures that the upper and lower hole of the phase barrier are positioned correctly within the clip.
  • Page 161 Accessories 3.10 Accessories for integration in the power distribution equipment Installation - Frame size I • Remove the fasteners of the corresponding CT cover. • Use the fasteners to fix the clip to the corresponding mounting hole of the corresponding CT cover.

  • Page 162: Phase Barrier For Guide Frame

    Accessories 3.10 Accessories for integration in the power distribution equipment 3.10.5.2 Phase barrier for guide frame Article No. Description Article No. Phase barrier for withdrawable Circuit Breaker, Size I, 3P 3WJ9111-0AP61 Phase barrier for withdrawable Circuit Breaker, Size I, 4P 3WJ9111-0AP63 Phase barrier for withdrawable Circuit Breaker, Size II, 3P 3WJ9111-0AP62...
  • Page 163 Accessories 3.10 Accessories for integration in the power distribution equipment Installation - Frame size I • Screw the crossbar to the upper and bottom location of the guide frame. Ensure that the correct crossbars are installed in the correct position, see picture below for reference. Insert the clips between the crossbars and the rear side of the guide frame.
  • Page 164 Accessories 3.10 Accessories for integration in the power distribution equipment 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 165 Accessories 3.10 Accessories for integration in the power distribution equipment Installation - Frame size II • Screw the clips to the upper and bottom location of the guide frame. Only hand tighten the screws. • Insert the phase barrier, which is fixed in the correct position when you hear the "click" sound.

  • Page 166: Inspection & Maintenance

    Inspection & Maintenance General In addition to the costs of purchasing the protection devices and power distribution equipment, the expenditure associated with service and maintenance are a significant cost and time factor for the operator. • Inspection: Inspection refers to visual inspection of the circuit breaker and testing of the electrical and mechanical functions of the circuit breaker.
  • Page 167 Inspection & Maintenance 4.1 General 4. Qualification of inspection and maintenance personnel Inspection and maintenance work may only be performed by qualified operator personnel or by a qualified contracted company. This includes replacement of the contact system. For more information, see Chapter Maintaining the main contacts. 5.

  • Page 168: Safety Regulations

    Inspection & Maintenance 4.2 Safety regulations Safety regulations DANGER Hazardous voltage Will cause death, serious personal injury, or equipment damage. During operation, parts of the device or system are carrying hazardous electrical voltage. Improper handling of the device or system can result in death or serious injury, as well as significant material damage.

  • Page 169: Planning Of Inspection And Maintenance

    Inspection & Maintenance 4.3 Planning of inspection and maintenance Planning of inspection and maintenance 4.3.1 Inspection interval WARNING Malfunction due to insufficient inspection or maintenance The circuit breaker may not function properly if inspection intervals are not adhered to or if maintenance measures are not performed.
  • Page 170 Inspection & Maintenance 4.3 Planning of inspection and maintenance • Testing of settings of electronic trip unit for plausibility in accordance with the system conditions specified during system planning. • Inspection of the electronic trip unit by reading out the status and maintenance information.

  • Page 171: Logging

    Inspection & Maintenance 4.3 Planning of inspection and maintenance 4.3.3 Logging Note Obligation to maintain logs for warranty claims The operator must log all inspection and maintenance work. The logs should be kept in the archive for at least ten years. In order to make it possible to clearly identify the circuit breaker and the general data, every log should contain the following information: •...

  • Page 172: Performing Inspection

    Inspection & Maintenance 4.4 Performing inspection Performing inspection 4.4.1 General NOTICE Material damage resulting from relubrication The circuit breaker mechanism is sufficiently lubricated during production. Relubrication of the circuit breaker mechanism is unnecessary and may result in material damage. Never lubricate the breaker mechanism or the contacts of the circuit breaker. NOTICE Material damage due to blown particulates Disturbed dust can affect the function of the circuit breaker.

  • Page 173: Check Of The Available Documentation And Of The Rating/Accessory Label

    4.4.4 Testing of mechanical function of the circuit breaker Note Siemens recommends closing and opening under a load of at least 200 A. Check the following items: • Manual operating mechanism: – Perform nine strokes (final stroke requires slightly more force) –...

  • Page 174: Testing Of Mechanical Function Of The Withdrawable Circuit Breaker And The Guide Frame

    Inspection & Maintenance 4.4 Performing inspection 4.4.5 Testing of mechanical function of the withdrawable circuit breaker and the guide frame Note The inspection of the withdrawable circuit breaker also includes all the items in Section Testing of mechanical function of the circuit breaker (Page 172). Check the following items: •...

  • Page 175: Testing Of Mechanical And Electrical Function Of Internal Accessories

    Inspection & Maintenance 4.4 Performing inspection 4.4.7 Testing of mechanical and electrical function of internal accessories NOTICE Damage to accessories Incorrect auxiliary power supply can damage internal accessories. The electrical functions of the internal accessories may only be tested with auxiliary voltage. Ensure that the rated auxiliary voltage level is applied to the internal accessories.

  • Page 176: Testing Of Settings And Inspection Of The Electronic Trip Unit

    Testing of settings and inspection of the electronic trip unit Removal NOTICE Retrofitting for the electronic trip unit is only permissible by Siemens customer service specialists. 1. Unscrew the electronic trip unit. 2. Remove the electronic trip unit from the breaker.

  • Page 177: Inspection Of Arc Chutes, Arc Chute Covers And Main Contact System

    Inspection & Maintenance 4.4 Performing inspection Installation 1. Attach all plugs to the electronic trip unit. 2. Install the electronic trip unti on the breaker. Note Make sure that you do not damage the cable harness. 3. Fix the electronic trip unit to the breaker with the corresponding screws. Test Note After the ETU replacement, the Circuit Breaker must be tested with the hand-held test device.

  • Page 178: Checking The Wear On The Contacts

    Inspection & Maintenance 4.4 Performing inspection 4.4.10 Checking the wear on the contacts You have to check the wear on the contacts: • Every 12 months or after 1000 switching operations • After serious shutdowns Process of checking 1. Loosen the fixing screws. 2.

  • Page 179: Preparation For Maintenance Work

    Inspection & Maintenance 4.5 Preparation for maintenance work Preparation for maintenance work Note Observe the instructions in Chapter Safety regulations (Page 167). 1. Open the door of the control cabinet. Follow the instructions in the operating instructions for the relevant interlock to bypass an optionally installed interlock.
  • Page 180 Inspection & Maintenance 4.5 Preparation for maintenance work 3. Withdrawable version: Rack the circuit breaker into disconnected position and remove it from the guide frame. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 181: Maintaining The Arc Chutes

    Inspection & Maintenance 4.6 Maintaining the arc chutes Maintaining the arc chutes NOTICE Damage to the arc chutes If the disassembled chutes are set down in the vertical position, the insulating walls of the arc chutes can be damaged. Always lay arc chutes on their sides. 1.

  • Page 182: Maintaining The Main Contact System

    Inspection & Maintenance 4.7 Maintaining the main contact system Arc chute article numbers Article number Size 1 Breaking capacity S, 1 pc. 3WJ9111-0AP31 Size 2 Breaking capacity S, 1 pc. 3WJ9111-0AP32 Maintaining the main contact system The main contacts can be replaced as often as required until the circuit breaker has reached its maximum mechanical service life including maintenance.
  • Page 183 Inspection & Maintenance 4.7 Maintaining the main contact system Check the contents of the packaging 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 184 Inspection & Maintenance 4.7 Maintaining the main contact system Preparatory steps Perform all steps outlined in the chapter Preparation for maintenance work (Page 178). Withdrawable Circuit breaker 4000 A If you have a 4000 A withdrawable Circuit breaker you have to remove the spacers on the rear contacts before maintaining the main contact system.
  • Page 185 Inspection & Maintenance 4.7 Maintaining the main contact system Removing the arc chutes 1. Loosen the fixing screws 2. Remove the arc chutes Disconnecting the contact carriers • Unscrew and remove the locking bolt. • Remove the coupling bolt by means of a screwdriver (as shown). 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 186 Inspection & Maintenance 4.7 Maintaining the main contact system Removing the rear housing of the Circuit breaker NOTICE Keep angle brackets on the Circuit breaker Only loosen the front screws and remove only the back screws to ensure that the angle brackets are still fixed to the breaker.
  • Page 187 Inspection & Maintenance 4.7 Maintaining the main contact system Removing the internal current transformers 1. Unscrew and remove the screws and washers of the current transformer housing. 2. Remove the current transformer housing. 3. Remove the current transformers from the rear housing of the Circuit breaker. Removing the contact carriers •...
  • Page 188 Inspection & Maintenance 4.7 Maintaining the main contact system • Remove the screws and washers and then remove the contact carrier. For 2000 A/2500 A versions: Also remove the spacer after removal of the contact carrier. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 189 Inspection & Maintenance 4.7 Maintaining the main contact system Removing the conduction paths Unscrew the screws with the washers and remove the conduction paths. 1600 A version Keep the spacers and throw away the conduction paths. 2000 A/2500 A versions Throw away the spacers and the conduction paths.
  • Page 190 Inspection & Maintenance 4.7 Maintaining the main contact system 3200 A/4000 A versions Throw away the conduction paths. Installing the conduction paths For versions ≲ 2500 A 1. Attach the spacers to the conduction paths. 2. Insert the conduction paths with the spacers into the rear housing. 3.
  • Page 191 Inspection & Maintenance 4.7 Maintaining the main contact system For 3200 A/4000 A versions 1. Insert the conduction paths into the rear housing. 2. Fix the conduction paths to the housing by means of the corresponding screws and washers. Installing the contact carriers •...
  • Page 192 Inspection & Maintenance 4.7 Maintaining the main contact system Installing the current transformers • Insert the internal current transformers into the rear housing. • Route the cables from the current transformers to the right and guide them through the hole in the rear housing. •...
  • Page 193 Inspection & Maintenance 4.7 Maintaining the main contact system Attaching the rear housing to the Circuit breaker Figure 4-1 A_Rear-panel 1. Connect all cables of the current transformers. 2. Attach the rear housing. Note Make sure not to crush any cables when mounting the back panel. 3.
  • Page 194 Inspection & Maintenance 4.7 Maintaining the main contact system Connecting the contact carriers • Press the contact carrier towards the coupling clips. Make sure that the contact carrier fully accommodates the coupling clips. • Insert the coupling bolt as shown and move it to the left by means of a screwdriver. •...
  • Page 195 Inspection & Maintenance 4.7 Maintaining the main contact system • Charge the stored-energy spring mechanism manually. • Close the Circuit breaker. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 196 Inspection & Maintenance 4.7 Maintaining the main contact system • Check the indicator for wear on the contacts. • Open the Circuit breaker. Attaching the arc chutes • Insert the arc chutes. • Tighten the fixing screws to secure the arc chutes. 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 197: Technical Specifications

    Technical specifications Circuit diagrams 5.1.1 Overall circuit diagram Accessories in overall circuit diagram Electronic trip unit F1/F2 Shunt trip (ST/ST2) Undervoltage release (UVR) Tripping solenoid Undervoltage release with delay (UVR-t) Spring charging motor Mechanical ON button Mechanical OFF button Stored-energy spring mechanism Spring charging lever for stored-energy spring Main contacts Mechanical indication and resetting plunger for overcurrent tripping...
  • Page 198 Technical specifications 5.1 Circuit diagrams 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 199: Terminal Connection Diagram Of Secondary Disconnect Terminals

    Technical specifications 5.1 Circuit diagrams 5.1.2 Terminal connection diagram of secondary disconnect terminals The following overview shows which part of the internal equipment is connected to which part of the secondary disconnect terminals, i.e. this is a complete auxiliary & control wiring diagram of the Circuit Breaker.

  • Page 200: Circuit Diagram For Undervoltage Release With Delay

    A continuous duty shunt trip may also be used as an electric interlock. Circuit diagram of accessories You'll find the circuit diagrams of other accessories in the corresponding operating instruction available on the Internet (https://support.industry.siemens.com). Dimension drawings 5.2.1 Fixed-mounted Circuit Breakers The broken contour at the side depicts the 4-pole version.
  • Page 201 Technical specifications 5.2 Dimension drawings Horizontal connection and vertical connection for up to 3200 A 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...
  • Page 202 Technical specifications 5.2 Dimension drawings Vertical connection 4000 A version Safety distances No additional safety distance from adjacent, grounded components is required above the Circuit Breaker (on fixed-mounted Circuit Breakers marked with "⑥"). The distance between the connection point and bar support must not exceed 250 mm Up to a rated operating voltage of 440 V AC, the vertical bars (e.g.

  • Page 203: Withdrawable Circuit Breakers

    Technical specifications 5.2 Dimension drawings 5.2.2 Withdrawable Circuit Breakers The broken contour at the side depicts the 4-pole version. Horizontal connection and vertical connection for up to 3200 A 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 204: Accessories 3 Pole / 4 Pole

    Technical specifications 5.2 Dimension drawings Vertical connection 4000 A version 5.2.3 Accessories 3 pole / 4 pole Mechanical interlock (1) Interlocking device that prevents closing (2). Comprising an interlock in the cabinet and an interlocking module with Bowden wire. For fixed-mounted Circuit Breakers For withdrawable Circuit Breakers ①...
  • Page 205 Technical specifications 5.2 Dimension drawings Arc chute cover For fixed-mounted Circuit Breakers For withdrawable Circuit Breakers Phase barrier For fixed-mounted Circuit Breakers Frame size I Frame size II For withdrawable Circuit Breakers Frame size I Frame size II 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 206: Door Cutout

    Technical specifications 5.2 Dimension drawings 5.2.4 Door cutout Door cutout for operator panel with door sealing frame Door cutout with edge protection Cutout after edge protection is attached 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 207: Current Transformer For N Conductor

    Technical specifications 5.2 Dimension drawings 5.2.5 Current transformer for N conductor Dimension diagrams of current transformers without bus bars Dimension diagrams of current transformers with bus bars 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 208: Troubleshooting

    Troubleshooting Fixed- Withdraw- Fault Cause Remedy mounted able Circuit Circuit Breakers Breaker ✓ ✓ The Circuit Breaker cannot be closed The stored-energy spring Charge the stored-energy mechanically and/or electrically. mechanism has not been spring mechanism. charged. (The Circuit Breaker is not ready to ✓...
  • Page 209 Troubleshooting Fixed- Withdraw- Fault Cause Remedy mounted able Circuit Circuit Breakers Breaker ✓ The Circuit Breaker cannot be The positioning mechanism Rack the positioning mech- switched from the maintenance of the Circuit Breaker is not anism to the disconnected position to the disconnected posi- in the disconnected posi- position.

  • Page 210: Disposal

    • Electronics, insulated cables, motors: Recycling by electrical scrap company Due to the long service life of the Siemens low-voltage circuit breakers, it may be the case that the instructions for disposal are no longer up to date at the time of decommissioning or that other disposal methods are prescribed by national regulations.

  • Page 211: Esd Guidelines

    ESD guidelines ESD components are destroyed by voltage and energy far below the limits of human perception. Voltages of this kind occur as soon as a device or an assembly is touched by a person who is not electrostatically discharged. ESD components which have been subject to such voltage are usually not recognized immediately as being defective, because the malfunction does not occur until after a longer period of operation.
  • Page 212 ESD guidelines The diagrams below illustrate the required ESD protective measures for electrostatic sensitive devices. ESD seat ESD standing position ESD seat and ESD standing position Protective measures Conductive floor ESD table ESD footwear ESD smock ESD bracelet Cubicle ground connection 3WJ Air Circuit breakers Operating Instructions, 12/2022, L1V30828903001-01...

  • Page 213: List Of Abbreviations

    List of abbreviations Abbreviation Meaning Output information 1, 2 1, 2 (Mechanical circuit breaker interlocking) ANSI American National Standards Institute Auxiliary switch American Wire Gauge Breaker identification module Breaker status sensor Circuit breakers (mechanical circuit breaker interlocking) 1, 2, 3 1, 2, 3 Closing coil Communication module...
  • Page 214 PZ 3 … 6 Crimping tools from Weidmüller in Detmold Remote Reset (remote trip alarm reset coil) S tripping Short-time delayed short-circuit trip SIGUT Siemens strain-relief clamp Shunt trip Shunt trip 2 (second shunt trip) TEST Test position Delay time of ground-fault tripping...
  • Page 215 List of abbreviations Abbreviation Meaning TRIP LT Cause for last trip was an overload in a main conductor TRIP ST Cause for last trip was a short-circuit (delayed) TRIP TEST Test trip for circuit-breaker testing Delay time of short-circuit trip Rated control circuit voltage Rated operational voltage Rated insulation voltage...

  • Page 216: Glossary

    Glossary Auxiliary switches Undervoltage releases and shunt releases are available. Closing coil Electrical closing of the energy in the spring energy store. Current transformer Generates energy (power supply) for the internal supply of the electronic trip unit. Electrical closing lockout This function is designed to electrically interlock two or more Circuit Breakers (closing lockout).
  • Page 217 Glossary Racking rail Moves the Circuit Breaker in the guide frame. Rated current coding The rated current is coded in the factory. Thus every Circuit Breaker can only be used in a guide frame with the same rated current. Ready-to-close signal switch This auxiliary switch is actuated depending on the ready-to-close status of the Circuit Breaker.
  • Page 218 Glossary Stored-energy spring mechanism Unit with spring energy store (mechanical energy). The spring is charged by means of the spring charging lever or motorized operating mechanism and maintained in a charged state by means of latches. When these latches are released, the stored energy is routed to the switching contact and the Circuit Breaker closes.

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