High-voltage high-current phase selection closing apparatus

Abstract

The invention discloses a high-voltage high-current phase selection closing apparatus. The closing apparatus comprises an operating mechanism, an arc extinguish chamber and a control loop; the arc extinguish chamber comprises a sealed insulating cylinder, and a moving contact and a fixed contact that are arranged in the insulating cylinder in an interworking manner; the fixed contact comprises a first fixed contact and a second fixed contact connected with an incoming line and an outgoing line respectively; the first fixed contact and the second fixed contact are fixed at the two ends of the insulating cylinder respectively; the moving contact is constantly in sliding electric connection with the second fixed contact; a brake-separating and brake-closing operation is finished by the separation and electric contact between the moving contact and the first fixed contact; the insulating cylinder is filled with compressed air; the output end of the operating mechanism is connected with the moving contact; and the control loop is used for controlling the actions of the operating mechanism. The arc extinguish chamber is insulated by adopting the high-voltage air to shorten the spacing among the contacts so as to adapt the high-voltage occasions requiring to improve the insulation level and reduce the spacing to ensure the rapid closing action; and in addition, the inherent closing time is ensured and the reliability in closing action is improved.

Description

technical field [0001] The invention relates to an option closing device, in particular to a high voltage and high current phase selection closing device. Background technique [0002] In the large-capacity test site of high-voltage electrical appliances, the success of the test is closely related to the normal operation of each switch in the circuit. The switches must operate in sequence according to the set time, and the actions must be in place to ensure each test parameter, otherwise it will be greatly increased. Probability of a null trial. In some type tests, such as circuit breaker T100a, fuse modes 1, 2 and 3, transformer sudden short-circuit test, etc., the requirements for the closing phase angle are very high, and the laboratory needs to artificially create the most severe test according to the standard. The transient process is used to assess the test product, and the phase selection closing technology will be used at this time. Generally, 2 to 3 single-phase s...

AI Technical Summary

Problems solved by technology

[0005] The existing phase-selection closing device has the disadvantages of low voltage, small flow capacity, and small capacity. Today, with the rapid development of the high-voltage electrical industry, it is far from being competent for the existing equipment and environment. In addition, the structure of the oil buffer part Complicated, difficult to maintain, inevitable to be eliminated

And correspondingly, in the environment of high voltage, high current, and strong electromagnetic field, the existing control loop does not protect the gate trigger, resulting in a high probability of misoperation and affecting the test efficiency

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