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The residual current protection function of a miniature circuit breaker (RCCB) is based on the detection of residual current by a zero-sequence current transformer.

MCB (Miniature Circuit Breaker) is a small circuit breaker used for overload and short-circuit protection.

The rated voltage and current of the circuit breaker should be greater than or equal to the normal operating voltage and current of the line equipment;

High rated short-circuit breaking capacity, with some rated current ratings exceeding 10kA.

Rated operating voltage (Ue): AC 230V/400V (1P), 400V (2P, 3P, 4P).

Miniature circuit breakers (MCBs), also known as micro circuit breakers, are suitable for overload and short-circuit protection of AC 50/60Hz lines with a rated voltage of 230/400V and a rated curr...

The installation of the residual current device (RCD) should conform to the manufacturer's product manual.

The correct and reasonable selection of the rated operating current of a residual current device (RCD) is crucial. Firstly, the RCD should selectively operate when an electric shock occurs or the l...

To standardize the proper use of residual current devices (RCDs), the state has successively promulgated a series of standards and regulations, including the "Regulations on Safety Supervision of R...

Residual current devices (RCDs) are installed at the branch circuit outlet, while residual current devices (RCDs) are installed at each appliance terminal, making them end-user installations.

Before understanding the main principle of an electric shock protector, it's necessary to understand what electric shock is.

First, when the power grid is indeed grounded, the residual current device (RCD) will operate normally. In these normal operations, the vast majority of activations are caused by grounding points i...