Secondary circuit of 220KV breaker hydraulic mechanism

A technology of hydraulic mechanism and secondary circuit, applied in the direction of protection switch operation/release mechanism, power device inside the switch, etc., can solve the problems such as the hydraulic mechanism pressure of the circuit breaker, system collapse, and circuit breaker fire that cannot be completely and correctly reflected. Achieve the effect of ensuring safe and stable economic operation, eliminating equipment hidden dangers, and ensuring safe operation

Inactive Publication Date: 2011-08-03
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit breakers in many substations have been used for more than ten or even twenty years since they were installed. Although overhauls have been carried out during this period, the problem of equipment aging is still serious. Among them, the problem of the hydraulic mechanism is prominent, and leakage occurs during operation, which is easy If the circuit breaker cannot correctly feed back the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] A 220KV circuit breaker hydraulic mechanism secondary circuit, which includes the following steps:

[0010] a. Select the type, quantity and installation position of the micro-switch of the pressure mechanism: select the micro-switch with model LX5-11Y, install the micro-switch on the piston rod of the pressure storage cylinder, and use a 1.5mm2 multi-core flexible wire to connect the The contact of the micro switch is connected to the terminal block of the mechanism box, and then led to the control room through the control cable for the protection device;

[0011] b. Selection of pressure value: select the pressure value down to 30.5Mpa as the pressure value that correctly responds to "pressure reduction blocking reclosing pressure";

[0012] c. Selection of the relay reflecting the pressure change of the hydraulic mechanism: The locking relay in the operation box of the protection device is used. When the pressure switch of the mechanism is installed and the pressure ...

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PUM

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Abstract

The invention discloses a secondary circuit of a 220KV breaker hydraulic mechanism. When the secondary circuit is used, as the type, the number and the installation position of a pressure mechanism micro switch are selected, a proper pressure value is selected and a relay reflecting the pressure change of a hydraulic mechanism is reasonably selected, operation practice proves that the instrument has the advantages of good operation effect and stable performance, and each performance index conforms to the Chinese standard requirement. After the breaker and the secondary circuit are reformed, hidden equipment dangers in the breaker are eliminated, and the breaker and a relay protection device are correctly matched, thereby causing electrical equipment to safely operate, and ensuring that relay protection work is safely operated. Therefore, breakers of the type are uniformly reformed to ensure a power grid system to operate safely, stably and economically operated.

Description

technical field [0001] The invention belongs to the technical field of application and maintenance of high-voltage circuit breakers, and in particular relates to a secondary circuit of a hydraulic mechanism of a 220KV circuit breaker. Background technique [0002] With the rapid development of the economy, the social economy and people's life demand for electricity is getting higher and higher. It is very important to ensure safe and reliable power supply. The safe and stable operation of the power grid depends to a large extent on the circuit breaker and the secondary system. Reliable performance. For the high-voltage circuit breaker, its function is to turn on and off the load current during normal operation; to cut off the short-circuit current and cut off the faulty equipment when there is a fault. In actual operation, most of the 220KV high-voltage circuit breakers use sulfur hexafluoride switches, equipped with hydraulic operating mechanisms for opening, closing and a...

Claims

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Application Information

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IPC IPC(8): H01H71/10H01H3/24
Inventor 徐耀辉曹玲玲冯政协朱珂陈宗彦李喜云梁冰杜世民王银忠
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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