140M-C2E-B25 | Allen-Bradley Motor Protection Circuit Breaker 1.6-2.5 A, Frame C

The 140M-C2E-B25 is a magnetic motor starter designed by Schneider Electric, used for controlling and protecting electric motors in various industrial applications. It features magnetic contactors for switching, a thermal overload relay for protection, and can be used to start and stop motors automatically or manually. This model is rated for a 25A current capacity.

To replace the 140M-C2E-B25 motor starter:

1. Power down the system: Ensure that the motor and all related systems are powered off before beginning the replacement.
2. Remove the old motor starter:

• Disconnect the input and output wiring (power and control circuits).
• Unscrew and remove the old motor starter from its mounting.

3. Install the new motor starter:

• Mount the new 140M-C2E-B25 starter in the same position.
• Reconnect the wiring as per the electrical schematics.
• Ensure that the wiring is properly connected to the contactor and overload relay terminals.

4. Test the new motor starter: Power up the system and test the starter’s functionality, ensuring it operates as expected (i.e., motor starts, stops, and is protected from overload).

Always refer to the specific user manual for wiring and installation instructions.

Before replacing the 140M-C2E-B25, check:

1. Motor specifications: Ensure the new starter is compatible with the motor's voltage and current requirements.
2. Wiring connections: Confirm that the wiring for both control and power circuits is correctly matched to the new motor starter.
3. Mounting space: Make sure the new starter will fit into the existing space without modification.
4. Overload settings: If replacing the overload relay, verify the settings are suitable for the motor's full-load current to avoid damage.

The overload relay on the 140M-C2E-B25 can be adjusted by:

1. Locating the adjustment dial on the overload relay.
2. Setting the current: Turn the dial to match the motor's full-load current rating (usually specified on the motor nameplate).
3. Confirming the trip class: Ensure that the trip class of the overload relay matches the application requirements (Class 10, Class 20, etc.).

Refer to the product manual for more specific details on adjusting the overload relay.

If the 140M-C2E-B25 starter trips frequently, consider these troubleshooting steps:

1. Check the motor: Ensure the motor is not drawing excessive current. Check for mechanical issues such as a seized bearing or blocked fan.
2. Verify overload settings: Ensure the overload relay is correctly set to the motor’s full-load current and that the overload relay is functioning properly.
3. Inspect wiring: Verify the power and control wiring for any loose connections or short circuits.
4. Check environmental conditions: Ensure the starter is not exposed to extreme temperatures or humidity, which could affect its performance.
5. Check for faulty contactors: Ensure the contactors are not worn out or malfunctioning.

If the issue persists, consult with a qualified technician or contact Schneider Electric support for assistance.