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Direct-current soft switching-off module

A soft-off, high-voltage DC technology, applied in electrical switches, circuit breaker parts, electrical components, etc., can solve problems such as troublesome operating procedures, difficult manufacturing processes, and complex structures, and achieve simple circuits, simple manufacturing processes, and cost. low effect

Active Publication Date: 2015-03-25
何曙光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the industry has developed and produced a variety of high-voltage DC circuit breakers using the above-mentioned methods, their structures are relatively complicated and the cost is high.
The manufacturing process of some products is difficult, and the operation procedures of some products are cumbersome, which need to be improved.

Method used

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Examples

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Embodiment Construction

[0011] Below in conjunction with embodiment explain accompanying drawing and illustrate the invention of the present invention.

[0012] figure 1 It is the circuit diagram of the first scheme of the present invention, and it is also an embodiment. This scheme is called "non-electrical isolation soft shutdown". figure 1 Among them, X1 and X2 are high-voltage direct current power supplies, wherein X1 terminal is positive pole, and X2 terminal is negative pole. One end (1) of the metal contact K1 of the switch is connected to the positive pole X1 of the high-voltage DC power supply, the other end (2) of the metal contact K1 is connected to one end of the electric load RL, and the other end of the load RL is connected to the negative pole X2 of the high-voltage DC power supply. The power consumption status of the load RL is controlled by opening or closing the contact K1.

[0013] Three branches are connected in parallel at both ends of (1) and (2) of the metal contact K1 of the...

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Abstract

The invention relates to a direct-current soft switching-off module and belongs to the high-voltage direct-current circuit breaker technical field. The direct-current soft switching-off module can be adopted as a switch contact and a high-power direct-current contactor contact of a high-voltage direct-current system so as to realize soft switching off in current switching off to eliminate electric arcs. According to the direct-current soft switching-off module, a metal contact of a switch is connected in parallel with three branch circuits, namely, a thermistor and thyristor series branch circuit, a capacitor and resistor series branch circuit and a varistor, wherein the thyristor can be replaced by a temperature control switch; the metal contact and each parallel branch circuit are adopted as an integrated body so as to form the direct-current soft switching-off module, and a shell and a mechanical shifting device can be additionally adopted, and as a result, a switch product can be formed. The direct-current soft switching-off module of the invention has the advantages of simple circuits, low cost of components, simple manufacturing process, excellent actual measurement arc quenching performance and high switching-off performance.

Description

technical field [0001] The invention relates to a DC soft shut-off module, which belongs to the technical field of high-voltage DC circuit breakers, and can be used as a switch contact of a high-voltage DC system and a contact of a high-power DC contactor, and realizes soft shut-off to eliminate arcs when breaking current. Background technique [0002] There are many capacitive and inductive components in the DC system line, such as reactors, filter devices, etc. There are also distributed parameter inductance and distributed parameter capacitance on the transmission line, which will generate a lot of energy when breaking the high-current DC circuit, which will be released in the form of an arc. Although the switch contacts are made of high-melting-point metal materials, if no measures are taken, they will still be ablated and damage the switch. DC current does not have a zero point like AC current, and the arc can be automatically extinguished at the current zero point, so ...

Claims

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Application Information

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IPC IPC(8): H01H9/30H01H73/18
CPCH01H9/30H01H73/18
Inventor 何曙光
Owner 何曙光
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