A three-trip surge protector with active arc extinguishing

Abstract

The invention discloses a three-trip surge protector with active arc extinguishing, which includes a piezoresistor M, a fast fuse E, a thermal fuse T, an electrode arm X and a mechanical trip arm Y. The sensitive resistor M is connected in parallel, the electrode arm X is connected to the mechanical trip arm Y, the two ends of the fast fuse E are provided with a node A and an arc-extinguishing connection node D, and the electrode arm X is provided with an N pole trip point B and node C, the trip point B is connected in series with the piezoresistor M, the temperature fuse T is connected in series with the electrode L and the piezoresistor M, and the temperature fuse T and the piezoresistor M are connected at point G, the present invention can Instantaneous short circuit and fast fusing path, achieving the effect of instant arc extinguishing.

Description

technical field [0001] The invention relates to an active arc-extinguishing surge protector. Background technique [0002] With the promotion and application of photovoltaic power sources, a considerable part of the operating devices and lines of photovoltaic systems are installed in the LPZ0B area, which is vulnerable to electromagnetic induction attacks. The DC lines for collecting power often generate overvoltages, resulting in damage to other equipment in the photovoltaic system. The current The overvoltage protection method is to install a surge protector on the line, but the surge protector at this stage is developed on the AC power supply, and its inspection and test methods follow the inspection method of the low-voltage AC power distribution system. Although the photovoltaic DC circuit The surge protectors used are the same in terms of lightning protection principles and discharge methods, but there are great differences in the failure modes of surge protectors. The...

AI Technical Summary

Problems solved by technology

[0002] With the promotion and application of photovoltaic power sources, a considerable part of the operating devices and lines of photovoltaic systems are installed in the LPZ0B area, which is vulnerable to electromagnetic induction attacks. The DC lines for collecting power often generate overvoltages, resulting in damage to other equipment in the photovoltaic system. The current The overvoltage protection method is to install a surge protector on the line, but the surge protector at this stage is developed on the AC power supply, and its inspection and test methods follow the inspection method of the low-voltage AC power distribution system. Although the photovoltaic DC circuit The surge protectors used are the same in terms of lightning protection principles and discharge methods, but there are great differences in the failure modes of surge protectors. The AC power distribution system has a zero-crossing arc extinguishing design, and the DC does not have a zero-crossing, so When the surge protector fails, its tripping arc extinguishing action is obviously different from that of the AC tripping arc extinguishing

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