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Direct-current circuit breaker with selectivity

A technology of DC circuit breakers and circuit breakers is applied in emergency protection circuit devices, switches and electrical components that are actuated by overcurrent and other abnormal electrical conditions, and can solve problems affecting the continuity of power supply of power distribution systems. To achieve the effect of simple structure and continuity

Active Publication Date: 2010-08-18
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly affects the continuity of power supply of various power distribution systems

Method used

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  • Direct-current circuit breaker with selectivity
  • Direct-current circuit breaker with selectivity
  • Direct-current circuit breaker with selectivity

Examples

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Embodiment Construction

[0019] Reference will now be made in detail to example embodiments of the invention, examples of which are illustrated in the accompanying drawings, like reference numerals referring to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0020] figure 1 is a schematic diagram of the structure and principle of the selective direct current circuit breaker according to the first exemplary embodiment of the present invention.

[0021] Such as figure 1 As shown, the selective direct current circuit breaker according to the present invention includes a circuit breaker main circuit device 100 and an auxiliary circuit device 200, and the circuit breaker main circuit device 100 and the auxiliary circuit device 200 form two parallel current circuits.

[0022] The main circuit device 100 mainly includes a first trip unit 1, a first magnetic trip system 2, a first main contact 3, a main mechanism 5, a sec...

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Abstract

The invention relates to a direct-current circuit breaker comprising a main loop device and an auxiliary loop device which form two current loops connected in parallel, wherein the main loop device comprises a first tripper, a first magnetic tripping system, a first main contact, a main mechanism, a second tripper, a second magnetic tripping system and a second main contact, and the main mechanism is used for controlling the actions of the first main contact and the second main contact; the auxiliary loop device comprises a current directing and auxiliary triggering device, a short delay element, an auxiliary mechanism and an auxiliary tripper, wherein the current directing and auxiliary triggering device is connected between the anode and the cathode of a power supply in series and is used for detecting load short-circuit current and deciding whether the auxiliary triggering action is carried out or not according to the value of the load short-circuit current; the short delay element is used for carrying out short delaying when the auxiliary triggering action is carried out, and deciding whether the overtime signals of delayed time are outputted or not according to the fact whether the action of the current directing and auxiliary triggering device is kept or not; the auxiliary mechanism drives the main mechanism to make corresponding tripping actions; and the auxiliary tripper is used for triggering the auxiliary mechanism to trigger according to the fact the overtime signals of delayed time are outputted or not. The invention relates to the direct-current circuit breaker with selectivity.

Description

technical field [0001] The present invention relates to a DC circuit breaker used in a DC power distribution system, in particular to a DC miniature circuit breaker capable of providing three-stage fault protection including overload protection, short-circuit delay protection, and short-circuit instantaneous protection, so as to realize Option for downstream terminal miniature circuit breakers. Background technique [0002] With the development of electrical automation, miniature DC circuit breakers have become an electrical appliance widely used in low-voltage terminal power distribution systems. It can usually ensure the connection and disconnection under the rated current, rated voltage and rated load required by various users. When there is any abnormal fault in the circuit (such as overload or short circuit), it can disconnect the protected circuit by disconnecting the moving contact from the static contact, so that the load can be completely isolated from the DC power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/44H01H71/46H01H83/20H02H7/22
Inventor 孙海涛周磊
Owner SCHNEIDER ELECTRIC IND SAS
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