Grounding failure breaker

Abstract

This invention relates to an earth fault breaker set between the supply and loads composed of a fault detection circuit, a double stable circuit, a supply circuit, a solenoid relay, a trip switch, a test circuit and a tripping indicating circuit.

Description

technical field [0001] The invention belongs to an electrical safety device, in particular to a leakage fault circuit breaker. Background technique [0002] Conventional electrical appliances are generally connected to the power supply in the socket through wires and power plugs. This simple plug-in has potential dangers such as electric shock and fire to the use of electrical appliances. Electric shock is a grounding fault, which can be life-threatening in severe cases. Electrical fires are generally caused by neutral grounding faults. In such a situation where there are dangerous factors, we need a safer and more reliable leakage fault detection device to ensure the safety of electricity use. [0003] As we all know, products with the above protection functions mainly include: residual current leakage fault protector (abbreviation: "PRCD"), ground fault circuit interrupter (abbreviation: "GFCI" or "A1CI"), etc. For example: U.S. Patent No. 5177657 discloses a ground faul...

AI Technical Summary

Problems solved by technology

In particular, solenoid relays usually require a constant power supply (approximately 120 volts) to switch the solenoid relay and maintain the pull-in state. As a result, the solenoid relay is equivalent to a large power consumption power supply

Also, prolonged power to a solenoid relay will make the relay significantly hot and possibly burn out

There is less margin left in the mechanism and circuit design, and there are often malfunctions such as functional failures after bearing overload currents and lightning surges, which affect safe use.

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