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PLC control system of circuit breaker secondary circuit

A secondary circuit and control system technology, applied in the general control system, control/regulation system, program control, etc., can solve the problems of heavy operation and maintenance workload, low degree of control automation, cumbersome wiring, etc., to achieve reliable design principles, The effect of low operating cost and simple programming

Pending Publication Date: 2020-01-07
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the power supply system of the factory, the control, protection and signal circuit of the high-voltage circuit breaker mostly adopt the traditional relay switch control method, which has many components, cumbersome wiring, heavy operation and maintenance workload, many faults, and the degree of control automation. Low, poor reliability and many other problems, the invention provides a PLC control system for the secondary circuit of the circuit breaker

Method used

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  • PLC control system of circuit breaker secondary circuit
  • PLC control system of circuit breaker secondary circuit

Examples

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Embodiment 1

[0040] Such as figure 1 As shown, the embodiment of the present invention provides a PLC control system for the secondary circuit of a circuit breaker, including a PLC controller, a control circuit, and a detection and protection circuit; the control circuit is connected to the PLC controller through a control line;

[0041] The detection and protection circuit is connected with the PLC controller through a signal line;

[0042] One end of the control loop is electrically connected to the positive terminal of the power supply through a series fuse FU, and the other end of the control loop is connected to the negative terminal of the power supply.

[0043] The control loop includes a closing coil YO, a tripping coil YR, a circuit breaker QF, and a control switch SA;

[0044] The closing coil YO includes a first end and a second end, and the tripping coil YR includes a first end and a second end;

[0045] The first end of the closing coil YO is connected to the control switch ...

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Abstract

The invention provides a PLC control system of a circuit breaker secondary circuit. The PLC control system comprises a PLC, a control loop and a detection protection loop. The control circuit is connected with the PLC through a control line; the detection protection loop is connected with the PLC through a signal line; and one end of the control loop is electrically connected with a positive terminal of a power supply through a fuse connected in series and the other end of the control loop is connected with ta negative terminal of the power supply. A tripping coil comprises a first terminal and a second terminal; a first terminal of a closing coil is connected to a control switch through a normally-closed contact of a circuit breaker; and the first terminal of the tripping coil is connected to a control switch through a normally open contact of the circuit breaker. The control switch is connected to the negative terminal of the power supply through the fuse. A second terminal of the closing coil is connected with a second terminal of the tripping coil and then is connected to the positive terminal of the power supply by the fuse. The control switch and the circuit breaker are respectively connected with the PLC.

Description

technical field [0001] The invention relates to the technical field of circuit breaker secondary circuit control, in particular to a PLC control system for the circuit breaker secondary circuit. Background technique [0002] An automation instrument is an automation technology tool with relatively complete functions, which is composed of a number of automation components. It generally has several functions at the same time, such as measurement, display, recording or measurement, control, alarm, etc. The automation instrument itself is a system, but also a subsystem in the whole automation system. An automated instrument is an "information machine", and its main function is the conversion of information forms, converting input signals into output signals. The signal can be expressed in the time domain or frequency domain, and the transmission of the signal can be modulated into a continuous analog or intermittent digital form. [0003] At present, in the factory power supp...

Claims

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Application Information

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IPC IPC(8): G05B19/05H02H3/08H02H3/04
CPCG05B19/054H02H3/08H02H3/04G05B2219/1103
Inventor 梁晓平陈明吴玉涛文向南聂寿康孙发运于凯华刘琦王健杨建彪
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY
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