There exist many types of RCCB components in the market.Regardless,they all comprise of similar building blocks internally.Each RCCB typically has three blocks:detection,amplification,and execution unit.

1.Detection.Current sensors detect and measure the current leaked and issue warning signals once the leakage current exceed certain pre-set threshold.
2.Amplification.Quite often,the leakage current is very small.As such,it often has to be amplified in order for the detection element to recognize the "leak"as well as to measure the extent of the leak.Amplification is carried out by either mechanical or electronic means depending on the design approach taken by the RCCB.
3.Execution:Upon receiving of leakage signal beyond the pre-set threshold,the SCR changes from OFF-state to ON-state.The main coil is energized and the main switch subsequently changes from Closed-state to Open- state,thereby turning off the power supply.

JJM offers a complete solution for the RCCB application.A typical solution includes anti-surge varistors (MOVs) which is populated at the AC input,either high-voltage rectifier diode(Diode)or rectifier bridge(Bridge)for AC rectification,transient voltage suppressor(TVS)that protects against the over-voltage disturbance on the input AC-line,controller IC (IC)which oversees the overall operation of RCCB application circuit,execution unit(SCR),etc.