Permanent magnet vacuum on-load tap-changer

Abstract

The invention discloses a permanent magnet vacuum on-load tap switch including an insulation frame structure, and a high voltage side static end conducting board, a high-voltage side vacuum switch tube, a high voltage side movable end conducting board, a low voltage side static end conducting board, a low voltage side vacuum switch tube, a low voltage side movable end conducting board, a low voltage guide rail, a high voltage guide rail, a high voltage connecting rod, a low voltage connecting rod, a bistable state permanent magnet operation mechanism and a rotary arm unit. The bistable state permanent magnet operation mechanism can drive the rotary arm unit to rotate. The rotary arm unit can drive the high voltage connecting rod to move in the high voltage guide rail and drive the low volage connecting rod to move in the low voltage guide rail during a rotating process. The high voltage connecting rod can drive the high voltage side movable end conducting board to move up and down when moving in the high voltage guide rail. The low voltage connecting rod can drive the low voltage side movable end conducting board up and down when moving in the low voltage guide rail. The permanent magnet vacuum on-load tap switch works in transformer oil and no arc leakage may be generated. No metal evaporation is generated, so that contamination of the transformer oil and deterioration of the transformer oil are avoided.

Description

technical field [0001] The invention relates to the technical field of contactors, in particular to a permanent magnet vacuum on-load tap changer used in transformer oil. Background technique [0002] Most of the on-load tap-changers used in the existing special transformers are oil switches, and the structure is mainly a cylindrical layout. The tap-changing action is driven by the motor to drive the conductive slider to switch the contacts. Since the switch frequently drives the load switching, the electrical contact The generated arc in the transformer oil will lead to the cracking of the switch oil, resulting in the deterioration of oil quality such as free carbon and moisture, which reduces the insulation strength of the oil, limits the switching times of the switch, and even endangers the safe operation of the transformer. Oil switch type on-load tap-changers have a short maintenance period. Generally, every 6 months to 1 year or 2,000 to 4,000 times of tap change, it i...

AI Technical Summary

Problems solved by technology

[0002] Most of the on-load tap-changers used in the existing special transformers are oil switches, and the structure is mainly a cylindrical layout. The tap-changing action is driven by the motor to drive the conductive slider to switch the contacts. Since the switch frequently drives the load switching, the electrical contact The generated arc in the transformer oil will lead to the cracking of the switch oil, resulting in the deterioration of oil quality such as free carbon and moisture, which reduces the insulation strength of the oil, limits the switching times of the switch, and even endangers the safe operation of the transformer.

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