Ground leakage circuit breakers

Principle of operation of a ground leakage circuit breaker (application of a core-balanced CT) 21/680... 

Figure 21.2(b) Two-pole ground leakage circuit breakers (ELCBs or GLCBs)... 

A fast-acting circuit breaker that is sensitive to very low levels of current leakage to ground. They are designed to provide protection against electrical shock from ground... 

A GFCI is a fast-acting circuit breaker that senses small imbalances in a circuit caused by current leakage to ground. In a fraction of a second, the GFCI shuts off the electricity. 

The installation of earth leakage circuit breakers (ELCBs, or GFCIs - ground fault circuit interrapters in the US A), or residual current devices (RCDs), can be seen as an... 

The basic difference between the circuit breaker and the GFI is the amount of current to which each is designed to respond. Basically, the GFI is an extremely rapidly acting device sensitive to very low current—approximately 5 to 20 milliamperes. The GFI is used where a live conductor may develop a high-resistance short to a direct earth ground for example, where faulty insulation may develop in wet areas or a spill becomes electrically hot. Conventional breakers ordinarily will not respond to current leakage in such cases. In the U.S., electrical codes require that all outlets that are newly installed in bathrooms, kitchens near sinks, and outdoors be protected by GFI devices. Their purpose is to protect... 

---