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Control method and circuit for engagement and disengagement of DC circuit breaker

A technology for DC circuit breakers and control circuits, applied in circuits, electrical components, parts of protection switches, etc., can solve the problems of the closing coil affecting the opening speed, etc., and achieve the effect of improving the opening speed and eliminating residual magnetism.

Pending Publication Date: 2018-10-09
HENAN SENYUAN ELECTRIC CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control method for opening and closing of a DC circuit breaker to solve the problem that the opening speed of the DC circuit breaker is affected by the residual magnetism in the closing coil when the DC circuit breaker is opened; the present invention also provides a DC circuit breaker Control circuit for opening and closing

Method used

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  • Control method and circuit for engagement and disengagement of DC circuit breaker

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Embodiment Construction

[0018] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Embodiment of the control method for opening and closing the DC circuit breaker of the present invention

[0020] The method for controlling the opening and closing of the DC circuit breaker of the present invention is to disconnect the main circuit of the closing coil of the DC circuit breaker when the DC circuit breaker is opening, to de-energize the closing coil, and to apply and The current opposite to the current of the main circuit reversely charges the closing coil to eliminate the residual magnetism of the core material of the closing coil, increase the opening speed of the closing coil, and provide a guarantee for rapid opening. The specific implementation means of the method will be described in detail in the following embodiments of the control circuit, and will not be described in detail here.

[0021] Embodiment of the con...

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Abstract

The invention relates to a control method and circuit for engagement and disengagement of a DC circuit breaker and belongs to the technical field of DC circuit breaker control. According to the invention, current in a direction reverse to that of a main circuit of an engagement coil is applied to two ends of the engagement coil, so that reverse charging is performed on the engagement coil, residual magnetism of iron core material of the engagement coil is eliminated, the disengagement speed of the engagement coil is improved, so that a guarantee is provided for quick disengagement.

Description

technical field [0001] The invention relates to a control method and circuit for opening and closing of a DC circuit breaker, belonging to the technical field of DC circuit breaker control. Background technique [0002] In the low-voltage power distribution network, the most likely and most destructive fault is the short circuit. Circuit breakers are the most effective electrical equipment to avoid greater damage caused by short-circuit faults, and must have good short-circuit making and short-circuit breaking capabilities. [0003] In order to meet the opening and closing function requirements of the circuit breaker, the operating mechanism of the circuit breaker is usually designed with mechanical operating mechanisms such as springs and air pressure and electromagnetic operating mechanisms. However, in the faults of circuit breakers, mechanical faults account for a relatively high proportion. This is because mechanical devices usually have many unfavorable factors such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/12H01H71/24H01H71/26
CPCH01H71/121H01H71/2436H01H71/26
Inventor 张营奎裴亚迪张瑞瑞
Owner HENAN SENYUAN ELECTRIC CO LTD
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