Home > Blog
What is MCB, MCCB, and RCCB?
Publish Time: 2024-11-07 15:17Visit: 115

What is MCB, MCCB, and RCCB?

 

MCB, MCCB, and RCCB are types of electrical protection devices used in circuits to prevent damage from overloads, short circuits, and earth faults. Here's a breakdown of each:

 

1. MCB (Miniature Circuit Breaker):

   - Function: An MCB is a small device used to automatically disconnect a circuit in case of an overload or short circuit. It is commonly used in residential and commercial electrical systems to protect circuits.

   - Current Rating: MCBs are typically used for low-current circuits, usually up to 100 Amps.

   - Operation: MCBs are designed to trip when the current exceeds a preset level, either because of an overload or short circuit.

   - Applications: Lighting circuits, small appliances, and other residential or commercial low-power circuits.

 

2. MCCB (Molded Case Circuit Breaker):

   - Function: An MCCB is a more robust version of an MCB, used for higher current ratings and offering protection from overload, short circuit, and earth faults.

   - Current Rating: MCCBs can handle larger currents, typically from 10 Amps to 1600 Amps or higher.

   - Operation: Like an MCB, MCCBs trip during overloads or short circuits, but they also offer adjustable trip settings and better protection features, such as thermal and magnetic tripping mechanisms.

   - Applications: Industrial applications, large commercial buildings, and circuits requiring high current protection.

 

3. RCCB (Residual Current Circuit Breaker):

   - Function: An RCCB is designed to detect leakage currents (earth faults) and protect against electric shock by disconnecting the circuit when it detects an imbalance between the live (hot) and neutral conductors.

   - Current Rating: RCCBs are typically rated for 10 Amps to 100 Amps, though higher ratings are also available.

   - Operation: An RCCB trips when it detects a difference between the current flowing through the live and neutral conductors, which may indicate leakage to the earth (a possible electric shock risk).

   - Applications: Protection against electric shocks in homes, hospitals, and workplaces; often used in wet areas like bathrooms and kitchens.

 

Northland Electric Co., Ltd.

Northland Electric Co., Ltd. is located in Xinguang Street, Xinguang Industrial Zone, Liushi Town, Yueqing City, Zhejiang Province. It is a professional manufacturer of high and low voltage electrical components, including intelligent universal circuit breakers, molded case circuit breakers, electronic molded case circuit breakers, molded case automatic reclosers, miniature circuit breakers, residual current circuit breakers, knife switches, disconnectors, dual power automatic transfer switches, control and protection switches, and more. The company is a high-tech enterprise that integrates research and development (R&D) with production.

 

Summary of Differences:

- MCB: Protects against overload and short circuit.

- MCCB: Similar to MCB but for higher currents and more customizable protection features.

- RCCB: Protects against earth leakage, preventing electric shocks.

 

Each of these devices plays a critical role in enhancing electrical safety and preventing potential hazards. Northland Electric Co., Ltd. offers a wide range of these protection devices, supporting a variety of applications in both residential and industrial settings.

 #including air circuit breaker(ACB)moulded case circuit breaker (MCCB)miniature circuit breaker (MCB)dual-power automatic transfer switch (ATS), arc fault detection device (AFDD) ,surge protector,knife switch, isolation switch,etc#