For timely disconnecting and reconnecting, a special type of switching device is required to safeguard both human lives and power networks. It is not only essential for supplying reliable quality power to your electrical systems, but also to ensure your safety from any possible mishaps due to electric volatility. Havells RCCB contains a core that continuously senses and compares the difference (residual current value) in current values between the live and neutral wires. Any small change in the current value on account of such an event would trigger the RCCB to trip off the circuit. It also contains a test button to check the proper functioning of an RCCB at any point of time. Havells RCCB ensures a complete disconnect from any incoming and outgoing current, hence making it suitable (to be used) as main switch.