Accessories for Molded Case Circuit Breakers (MCCBs) enhance their functionality, safety, and ease of installation. Here are some common MCCB accessories:

1. Auxiliary Contact Blocks:

• Mechanical Auxiliary Contacts: These provide additional switching contacts for signaling or control purposes. They can be NO (Normally Open) or NC (Normally Closed).
• Mirror Contacts: These auxiliary contacts mimic the state of the main contacts, providing redundant signaling for monitoring.

2. Shunt Trip:

• A shunt trip accessory enables remote tripping of the MCCB by applying voltage to the shunt trip coil.

3. Undervoltage Release:

• An undervoltage release accessory ensures that the MCCB trips when the supply voltage falls below a specified threshold.

4. Motor Operators:

• Motor operators provide remote opening and closing of the MCCB contacts, typically used for motorized applications.

5. Rotary Handles:

• Rotary handles offer manual operation of the MCCB, allowing for easy ON/OFF switching.

6. Locking Devices:

• Locking devices prevent unauthorized operation of the MCCB by securing the operating mechanism with a padlock.

7. Terminal Shrouds:

• Terminal shrouds provide protection against accidental contact with live terminals, enhancing safety in electrical installations.

8. Busbars and Terminals:

• Busbars and terminals facilitate easy connection of MCCBs to electrical circuits and distribution boards.

9. Test Kits:

• Test kits provide tools and accessories for testing MCCB functionality and performance.

10. Ground Fault Protection:

• Ground fault protection accessories detect leakage currents and provide additional protection against electrical shock hazards.

11. Surge Arresters:

• Surge arresters protect MCCBs and connected equipment from voltage surges and transient overvoltages.

12. Arc Fault Protection:

• Arc fault protection accessories detect and mitigate arc faults, enhancing fire safety in electrical installations.

13. Remote Control and Monitoring:

• Remote control and monitoring accessories enable remote operation, status monitoring, and data logging of MCCBs.

These accessories complement MCCBs, offering additional features, protection, and convenience for various application requirements. It's essential to ensure compatibility between the MCCB and its accessories and to follow manufacturer recommendations for installation and usage.