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A 4P (Four-Pole) Earth Leakage Circuit Breaker is a safety device designed to protect electrical circuits by detecting current leakages to the earth. It disconnects all three phase lines and the neutral line simultaneously when a leakage current exceeds a safe threshold.
The OFKL-80A 4P breaker is ideal for industrial, commercial, and three-phase residential systems requiring reliable earth fault protection, overload protection, and short-circuit prevention.
Disconnection of the neutral pole alongside all active phase lines ensures complete electrical isolation, preventing potential electric shock hazards caused by neutral floating voltage or reverse currents.
By continuously monitoring the current balance between phase and neutral lines, it automatically cuts off power within milliseconds if a stray leakage current is detected, preventing fatal shocks and electrical fires.
It is recommended to test the earth leakage breaker monthly using the integrated test button to verify that the internal tripping mechanism is functioning correctly.
Standard circuit breakers protect against overcurrent and short circuits, whereas earth leakage breakers specifically monitor current leaks to ground to prevent electric shock and equipment damage caused by insulation faults.
