AC DC Residual current 1p 2P 3P 4P Mini MCB earth leakage Circuit breaker RCCB RCBO ELCB MCB RCB

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AC DC Residual Current Circuit Breakers (RCCB) and Residual Current Circuit Breaker with Overload Protection (RCBO) are important components in electrical systems for ensuring safety against electrical shocks and fire hazards. Here’s what each of these components does:

Miniature Circuit Breaker (MCB): MCBs are electromagnetic devices designed to protect electrical circuits from overcurrents and short circuits. They are available in different pole configurations, including 1P (single pole), 2P (double pole), 3P (triple pole), and 4P (four pole), depending on the specific application.

Earth Leakage Circuit Breaker (ELCB): ELCBs are specifically designed to detect small leakage currents caused by faults in electrical equipment or wiring. They provide protection against electrical shock by quickly disconnecting the circuit when a leakage current is detected.

Residual Current Circuit Breaker (RCCB): RCCBs are used to protect against electric shock caused by direct contact with live parts or indirect contact through faulty equipment. They continuously monitor the balance between incoming and outgoing currents, thereby detecting and disconnecting the circuit in the event of a current imbalance.

RCBO: An RCBO is a combination of an MCB and an RCCB or an ELCB. It combines protection against overcurrents (MCB function) and protection against earth leakage or residual current (RCCB or ELCB function) in a single unit.

It’s important to note that AC (alternating current) and DC (direct current) refer to the types of electrical current being used. Some of these circuit breakers are designed to work specifically with AC or DC currents, while others can handle both. When choosing a circuit breaker, it’s crucial to select the appropriate type for the specific electrical system and application.