OEM OFA OFM1/400A Molded Case Circuit Breaker Factories, Suppliers

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OEM OFA OFM1/400A Molded Case Circuit Breaker Factories, Suppliers

The OFA OFM1/400A Molded Case Circuit Breaker (MCCB) is a core power distribution protection component designed for high-current applications up to 400A. Featuring a distinctive cyan operation handle against a compact black housing, it integrates precisely adjustable overload and short-circuit protection, intuitive status indication, and a high Ultimate Breaking Capacity (Icu) of up to 50kA. With a high insulation voltage of 690V and a robust structural design, it is the preferred solution for achieving reliable protection and selective coordination in industrial main distribution systems, power supply for large equipment, and critical circuits.

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Product Description

Frequently Asked Questions

What is a Molded Case Circuit Breaker (MCCB)?

A Molded Case Circuit Breaker (MCCB) is a type of electrical protection device used to safeguard electrical circuits from excessive current, which can cause overloads or short circuits. It features a molded plastic housing to isolate the conductive components.

What is the main difference between an MCB and an MCCB?

The main difference lies in their current capacity and applications. Miniature Circuit Breakers (MCB) are typically rated up to 100 amps for low-current applications like residential setups, while Molded Case Circuit Breakers (MCCB) handle higher currents (up to 2500A) suitable for commercial and industrial applications.

How do I select the right current rating for a circuit breaker?

Select a circuit breaker rating based on the total continuous load current of your application and the wire size used. The breaker rating should match the maximum current carrying capacity of the circuit without tripping under normal operating conditions.

What causes a circuit breaker to trip?

A circuit breaker trips primarily due to circuit overload (too many appliances running), a short circuit (hot wire touching a neutral wire), or a ground fault (hot wire touching a grounded surface).

Can Molded Case Circuit Breakers be operated manually?

Yes, MCCBs are equipped with manual toggle switches that allow operators to turn the circuit ON or OFF manually during routine maintenance or emergency procedures.