A three-trip surge protector with active arc extinguishing

A surge protector and tripping technology, which is applied to emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., can solve the problem of being vulnerable to electromagnetic induction attacks and equipment damage And other issues

Active Publication Date: 2017-06-16
广东立信防雷科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A three-trip surge protector with active arc extinguishing
  • A three-trip surge protector with active arc extinguishing
  • A three-trip surge protector with active arc extinguishing

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Embodiment Construction

[0017] refer to Figure 1-Figure 3 As shown, a three-trip surge protector with active arc extinguishing includes a piezoresistor M, a fast fuse E, a thermal fuse T, an electrode arm X and a mechanical trip arm Y, and the fast fuse E is connected to the voltage The varistor M is connected in parallel, and the electrode arm X is connected to the mechanical trip arm Y. In use, when the surge protector fails, the varistor M generates heat, the temperature of the trip point B rises, and the connection of the trip point B is melted. Soldering, under the action of mechanical tripping arm Y pulling force F, node C is pushed to node D. During this process, there will be an arc between tripping point B and node C. Under the action of DC power supply, the tripping point B will Due to space constraints, there is a risk that the arc cannot be automatically extinguished. When node C is pushed to point D, node A and node C short-circuit node A and node C through fast fuse E, and the trip poi...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04
Inventor 何锡华冉丹婷叶仕辉
Owner 广东立信防雷科技有限公司
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