Overview and troubleshooting of Siemens air circuit breaker 3WT

Overview of Siemens Air Circuit Breaker 3WT

◆Environmental conditions

Siemens circuit breakers are suitable for operation in enclosed spaces where the operating conditions are not affected by dust or corrosive steam/gas. In dusty or humid conditions, an appropriate enclosure must be used.

◆Executive standards

GB/T 14048.2

IEC 60947-2

EN 60947-2

◆Overseas packaging

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

◆Long-term storage

It is necessary to replace or dry the desiccant, then seal it with plastic film and inspect the package regularly.

◆Unpacking and storage of circuit breakers

Unpack the Siemens circuit breaker to ensure that it is not damaged during transportation. If you do not install the circuit breaker or the guide frame immediately, you can only use the original packaging for storage and transportation. Remember not to turn the circuit breaker upside down during this process.

◆Transport by crane

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Place the guide frame

Transmitter|Encoder|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

Troubleshooting of Siemens Air Circuit Breaker 3WT

Fault state: The circuit breaker cannot be closed mechanically and/or electrically. (The equipment is not in the ready-to-close state, the ready-to-close indicator)

Fault reason 1: The stored energy spring mechanism is not stored.

Troubleshooting 1: Charge the stored energy spring mechanism.

Fault reason 2: The undervoltage release is not powered on.

Troubleshooting 2: Power on the undervoltage release.

Cause 3: The mechanical reclose lock is activated.

Troubleshooting 3: Correct the cause of the overcurrent trip and press the RESET button.

Cause 4: The electrical closure lock is activated.

Troubleshooting 4: Remove the closed and locked control voltage.

Cause 5: The mechanical off button is locked.

Troubleshooting 5: Enable button.

Failure reason 6: unable to close.

Troubleshooting 6: Close the switch cabinet door.

Fault reason 7: Siemens air circuit breaker 3WT mechanical interlock has been activated (accessory).

Troubleshooting 7: Disconnect the interlocked circuit breaker, or shake it to the off position.

Fault reason 8: The electronic overcurrent release is not installed or installed incorrectly.

Troubleshooting 8: Correctly install the electronic overcurrent release.

Fault reason 9: The air circuit breaker is set in the middle position of the guide frame (note that the position indicator is only with drawer type).

Troubleshooting 9: Shake the circuit breaker to the off, test or run position.

Fault reason 10: The safety shutter of the handle opening is not closed (only with drawer type).

Troubleshooting 10: Close the safety shutter (place it in the off, test or run position).

Fault state: Siemens circuit breaker cannot be closed electrically. (The circuit breaker is in the ready to close state, and the ready to close indicator is normal)

Fault reason 1: The operating voltage of the closing coil is incorrect or the closing coil is not energized.

Troubleshooting 1: Check whether the voltage is correct or whether it is powered on.

Fault reason 2: The circuit breaker is in the off position in the guide frame (withdrawable type only).

Troubleshooting 2: Shake the circuit breaker to the test or run position.

Fault reason 3: The auxiliary power connector has been unplugged (fixed only).

Troubleshooting 3: Plug in the auxiliary power connector.

Fault state: The guide rail cannot be pulled out to install the Siemens air circuit breaker 3WT.

Failure reason 1: The safety baffle is locked by 1 to 2 padlocks (drawable type only).

Troubleshooting 1: Remove the padlock.

Fault state: The Siemens circuit breaker cannot be switched from the maintenance position to the disconnected position.

Fault reason 1: The positioning mechanism of the circuit breaker is not in the off position (note that the position indicator is only with draw-out type).

Troubleshooting 1: Fully shake the positioning mechanism into the off position.

Fault reason 2: Attempt to insert the circuit breaker into a guide frame with a different rated current (drawable type only).

Troubleshooting 2: Only use Siemens circuit breaker 3WT with the same rated current as the guide frame rated current.

Fault reason 3: The coding method of the air circuit breaker and the guide frame is different (only withdrawable type).

Troubleshooting 3: Only use circuit breakers with the same rated current as the guide frame.

Fault state: When the Siemens circuit breaker is shaken from the disconnected position to the test position, it will immediately encounter greater resistance after moving through the disconnected position.

Fault reason 1: The circuit breaker is not inserted as far as possible and the side latch has not been stuck (Warning: it may cause damage to the equipment only with withdrawable type). Troubleshooting 1: Push the device as far as possible to the disconnected position, the side latch must be able to jam.

Fault state: When the Siemens circuit breaker is rolled from the off position to the test position, the circuit breaker does not move in the first 8 turns.

Failure reason 1: No failure, functional reasons (withdrawable type only). Troubleshooting 1: Continue to shake in.

Fault status: The handle cannot be inserted when it is inserted.

Cause 1: The OFF button is not pressed (drawable type only).

Troubleshooting 1: Press the OFF button while moving the slide switch to the right.

Cause 2: The switch cabinet door is not completely closed (drawable type only).

Troubleshooting 2: Close the switch cabinet door.

Fault reason 3: The opening of the shake-in handle has been locked with a padlock (only withdrawable type).

Troubleshooting 3: Remove the padlock.

Fault status: The switch cabinet door cannot be opened (the door interlock is optional as an accessory).

Fault reason 1: When Siemens air circuit breaker 3WT is closed, the switch cabinet door will be interlocked (fixed type only).

Troubleshooting 1: Open the circuit breaker.

Fault reason 2: The circuit breaker is in the running position (withdrawable type only).

Troubleshooting 2: Shake the Siemens circuit breaker to the test position or the disconnected position.

okplazas.com electromechanical mall specializes in selling Siemens products. Welcome to e-mail: [email protected] for consultation, and you can also contact wechat: +86-13689242098 online customer service for product consultation!