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Breaker control circuit

A technology for controlling circuits and circuit breakers, applied to circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as incorrect actions, susceptibility to interference, poor adaptability between control circuits and circuit breakers, and improve reliability , Simplify cooperation, facilitate production debugging and engineering implementation

Inactive Publication Date: 2017-04-26
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the current circuit breaker control circuit is easily disturbed and prone to incorrect action, and solve the problem of poor adaptability between the control circuit and the circuit breaker

Method used

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  • Breaker control circuit
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specific Embodiment

[0030] Such as image 3 As shown, it is a preferred circuit schematic diagram of a circuit breaker control circuit described in a specific embodiment of the present invention. in,

[0031] In the closing control circuit: the starting module 101 is composed of an electromagnetic relay K1, the operating current of K1 is lower than the closing current of the circuit breaker, and the coil impedance of K1 is much lower than the closing coil of the circuit breaker; the holding module 102 is composed of the contact of the relay K1 Composition; the auxiliary module 103 is composed of a Zener diode Z1.

[0032] In the trip control circuit: the starting module 201 is composed of an electromagnetic relay K2, the operating current of K2 is lower than the tripping current of the circuit breaker, and the coil impedance of K2 is much lower than the tripping coil of the circuit breaker; the holding module 202 is composed of contacts of the relay K2; The auxiliary module 203 is composed of a...

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Abstract

The invention discloses a breaker control circuit. The circuit is functionally divided into a closing control circuit and a trip-out control circuit which have the same structure. The control circuit is composed of a starting module, a maintaining module and an auxiliary module. According to the invention, trip-out closing control of a breaker can be completed, the reliability is high, and the application is simple. The breaker control circuit has the following advantages: the reliability of the breaker control circuit can be effectively improved the anti-interference capability is enhanced, and the misoperation probability is reduced; and the adaptability of the control circuit can be improved, cooperation with the breaker is simplified, and production debugging and engineering implementation are facilitated.

Description

technical field [0001] The invention relates to the field of power system and industrial control, in particular to a circuit breaker control circuit. Background technique [0002] The circuit breaker is the interface for secondary equipment such as relay protection and measurement and control in the power system and industrial control system to control the primary system. It is necessary to correctly control the power load transmission and system fault isolation. [0003] The rated current of the tripping coil and closing coil of the circuit breaker is too large, which exceeds the current breaking capacity of the output contact of the secondary equipment. The output contacts of the secondary equipment cannot directly control the circuit breaker, and need to control the circuit breaker through a special circuit. The circuit breaker control circuit is either contained in the operating relay box, or integrated in the operating module of the secondary equipment. [0004] Such ...

Claims

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Application Information

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IPC IPC(8): H02H3/02
CPCH02H3/021
Inventor 刘杲培
Owner NR ELECTRIC CO LTD
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