Backup protector for surge protector

Abstract

The invention relates to a backup protector for a surge protector. A left wiring terminal and a right wiring terminal are connected through a main circuit; the surge protector protects a main electric wire when damage is done; the backup protector further comprises a circuit board module, an electromagnetic switch, a mutual inductor and an electromagnetic release; a resistor, a diode, an inductor and a capacitor are fixed on the circuit board module; furthermore, all are connected with each other in parallel; the main circuit is provided with a movable contact and a static contact; furthermore, the main circuit is set to pass through the mutual inductor; the mutual inductor is connected to the circuit board module; and the electromagnetic switch is arranged between the circuit board module and the electromagnetic release. The backup protector for the surge protector is used with the surge protector in series; therefore, short-circuiting of a main power supply circuit due to the phenomena, such as breakdown, short-circuiting, aging and inferior, because of high current impact of thunder and lightning, and the phenomena, such as a disaster due to fire breakout and a phenomenon that electric equipment cannot normally work due to tripping, can be effectively avoided; security assurance is provided for national defense, industrial and agricultural production, communication, families, works and the like; and the backup protector disclosed by the invention is simple and compact in structure.

Description

technical field [0001] The invention relates to the field of lightning surge protection equipment, in particular to a backup protector for surge protectors. Background technique [0002] Surge protector, referred to as SPD, is suitable for AC 50 / 60HZ, rated voltage 110V, 220V to 380V, 415V, 440V power supply system or communication system, to protect against indirect and direct lightning effects or other transient overvoltage surges , It is suitable for backup protection of surge (lightning protection) protectors used in family residences, tertiary industries, communications, national defense, industry and other fields. At present, due to the lightning electromagnetic pulse current of 10, 20, 40, 60, 80, 100kA (8 / 20μs), 25kA (10 / 350μs) impact or the power frequency (fault) overvoltage impact of the power supply and distribution system, resulting in waves Surge protector breakdown, short circuit, leakage and other phenomena will cause power supply and distribution system tri...

AI Technical Summary

Problems solved by technology

At present, due to the lightning electromagnetic pulse current of 10, 20, 40, 60, 80, 100kA (8 / 20μs), 25kA (10 / 350μs) impact or the power frequency (fault) overvoltage impact of the power supply and distribution system, resulting in waves Surge protector breakdown, short circuit, leakage and other phenomena will cause power supply and distribution system tripping, short circuit, burning and other vicious accidents

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