TONGOU electrical focus on manufacturing residual current circuit breaker (RCCB) products for almost 25 years. Besides, TONGOU has been dedicated effort to protecting personal safety. Our RCCB products provide electricians protection against electric shocks when they are installing the power distribution system and maintaining circuit.

As time goes, TONGON has developed Type A and B residual current circuit breakers. Normally, it is useful for improving and protecting the DC and new energy system. To stay true to our mission, we are insisting on producing superior quality products to keep electricity safety for each user.

As the development of modern industry, electricity becomes amazingly useful. However, it also becomes amazingly dangerous too.
Do you know that it takes only a few milliseconds for a strong electric current flowing through your heart to harm you? Think about this, if you’re using an electric cutter and you accidentally chop through the cable. Besides, the tool has a metal case, you’re holding on it and you accidentally touch the peeled wire. What’s more, you’re standing on the ground but the electricity has to go somewhere. At this time, there’s a very high risk that your body will form a “short circuit”.

So how to prevent electricity through our body?

One way to reduce the risk is to use a clever protective device called a residual current device (RCD), or residual-current circuit breaker (RCCB). The RCD/RCCB is a device that instantly breaks an electric circuit to prevent serious harm from an ongoing electric shock. In Europe, these are better known by their initials RCD. Also, a combined RCD+MCB (miniature circuit breaker) is known as RCBO (residual-current circuit breaker with overcurrent protection).

In America, the device is more commonly known as a ground fault circuit interrupter (GFCI), ground fault interrupter (GFI) or an appliance leakage current interrupter (ALCI). In Australia, they are sometimes known as safety switches or an RCD. An earth leakage circuit breaker (ELCB) may be a residual current device, although an older type of voltage-operated earth leakage circuit breaker also exists.


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