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Circuit Breaker Opening and Closing Speed ​​Accurate Measurement System

An accurate measurement and circuit breaker technology, applied in circuit breaker testing and other directions, can solve the problems of measurement results and actual speed error, difficult to meet the accurate measurement of circuit breaker opening and closing speed, etc., and achieve a reasonable design effect.

Active Publication Date: 2011-12-21
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the above method is that due to the coordination error in the connection between the various parts of the operating mechanism, there is an error between the measured result and the actual speed, and it is difficult to meet the accurate measurement of the opening and closing speed of the circuit breaker.

Method used

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  • Circuit Breaker Opening and Closing Speed ​​Accurate Measurement System
  • Circuit Breaker Opening and Closing Speed ​​Accurate Measurement System

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Embodiment Construction

[0010] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0011] A circuit breaker opening and closing speed accurate measurement system, such as figure 1 As shown, it includes the measurement and control host, data acquisition device, standard capacitor and variable frequency AC power supply. The measurement and control host is connected to the data acquisition device through the network interface to transmit measurement and control commands and data; the data acquisition device is connected to the circuit breaker under test through a coaxial cable. The connection is used to control the opening and closing action of the circuit breaker under test. The data acquisition device is also connected to the two ends of the standard capacitor through a pair of coaxial cables to collect the voltage at both ends of the standard capacitor; one end of the variable frequency AC power supply is connected to one end of t...

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Abstract

The invention relates to a circuit breaker switching on and off speed precise measurement system, which comprises a measurement and control host, a data acquisition device and a voltage regulator, wherein the measurement and control host is connected with the data acquisition device via a network interface to transmit measurement and control orders and data, the data acquisition device is connected with a transformer to be measured through a coaxial cable to be used for acquiring temperature and current signals of the transformer to be measured, the data acquisition device is also connected with an input control end of the voltage regulator to be used for controlling voltage at a voltage end, and an output end of the voltage regulator is connected with a three-phase input end of the transformer to be measured. The system disclosed by the invention has a reasonable design, standard capacitors are connected outside movable and fixed contacts of a circuit breaker to be measured and the waveform changes of the standard capacitors in the switching on and off processes are measured to obtain the stroke of the movable contact in each time period, so the action speed of the circuit breaker in a certain time interval is accurately measured, and the system can be widely used for accurately measuring the circuit breaker switching on and off speed in an electrical power system.

Description

technical field [0001] The invention belongs to the field of high-voltage circuit breakers, in particular to an accurate measurement system for the opening and closing speed of a circuit breaker. Background technique [0002] In the power system, the opening speed and closing speed of the high-voltage circuit breaker are one of the important technical data to measure the working condition and performance of the circuit breaker. Since the moving and static contacts of the circuit breaker are sealed in the arc extinguishing chamber, the existing instruments used to measure the speed of the circuit breaker usually measure the speed of the moving contact indirectly by measuring the speed of the operating mechanism connected to the moving contact. The problem with the above method is that due to the coordination error in the connection between the various parts of the operating mechanism, there is an error between the measured result and the actual speed, and it is difficult to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
Inventor 满玉岩
Owner STATE GRID TIANJIN ELECTRIC POWER
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