A connection structure between closing resistor and arc extinguishing chamber of sf6 circuit breaker

Abstract

The invention discloses a connection structure of an SF6 breaker closing resistor and an explosion chamber. The connection structure includes a closing resistor loop and an explosion chamber major loop which are connected in parallel, wherein the closing circuit includes a resistor pile which is formed by a plurality of series-parallel resistor discs; one end of the resistor pile is connected with an outlet conductor through a first closing resistor flange; the other end of the resistor pile is connected with a closing resistor contact through a second closing resistor flange; the explosion chamber major loop is connected with the outlet conductor through a main loop conductor; when a breaker mechanism performs closing operation, closing of the closing resistor contact is firstly implemented, and then the closing resistor loop which is connected with the closing resistor contact is switched on; and the closing resistor is connected with the line system in advance, so that most of the overvoltage energy on the line are consumed on the closing resistor discs, and then closing of an explosion chamber contact is implemented and the explosion chamber main loop is switched on; and then short circuit occurs in the explosion chamber major loop, and the closing resistor quits running.

Description

【Technical field】 [0001] The invention relates to the technical field of high-voltage switch power transmission equipment, in particular to a connection structure for the arrangement of closing resistors and arc extinguishing chambers of SF6 tank circuit breakers. 【Background technique】 [0002] The closing resistor is a device that absorbs the operating overvoltage energy generated when the high-voltage circuit breaker is closed in the power system. According to the requirements of the power system, generally SF6 circuit breakers with a voltage level of 363kV and above are equipped with a closing resistor, especially Above the ultra-high voltage level, a large number of resistors are needed. In the prior art, the resistor stack is usually suspended and fixed on the flange of the arc extinguishing chamber. On the insulating support of the arc extinguishing chamber, when the number of resistors is large, the series length of the resistors is very long, and the resistance of t...

AI Technical Summary

Problems solved by technology

[0002] The closing resistor is a device that absorbs the operating overvoltage energy generated when the high-voltage circuit breaker is closed in the power system. According to the requirements of the power system, generally SF6 circuit breakers with a voltage level of 363kV and above are equipped with a closing resistor, especially Above the ultra-high voltage level, a large number of resistors are required. In the prior art, the resistor stack is usually suspended and fixed on the flange of the arc extinguishing chamber. On the insulation support of the arc extinguishing chamber, when the number of resistors is large, the series length of the resistors is very long, and the resistance of the suspension is not well stressed. The mutual extrusion of the resistors will cause the resistors to be crushed, and the strength of the frame and the insulating support If the requirements are too high, the overall strength and reliability of the arc extinguishing chamber will be reduced

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