Conversion-drum three-position isolating mode and isolating switch

Abstract

The invention relates to a conversion-drum three-position isolating mode and a conversion-drum three-position isolating switch. In the isolating mode, three-position isolating operation is realized through a conversion drum; a three-position operating mode comprises an operating mode, a grounding mode and a workshop power supply mode; a pressure-regulating and large current flow contact is taken as a stationary contact in a conversion drum mode; and optional positioning is performed and the switch-on modes of contacts at a plurality of positions are combined as required by optionally rotatingthe conversion drum in a rotation space by 360 degrees so as to realize circuit switch-on and isolating operation in the operating mode, the grounding mode and the workshop power supply mode respectively. High-voltage large current and the circuit connecting state of each electric component of an input power supply circuit are controlled in the conversion-drum three-position isolating mode under the operating, grounding and workshop working conditions, isolating and grounding are compounded integrally, communicating, isolating and grounding functions are realized, the number of elements is reduced, manufacturing cost is lowered and equipment reliability is improved.

Description

technical field [0001] The present invention relates to an electrical component operating mode and device structure, in particular to an isolation mode and an isolating switch in a multi-position high-current isolation main circuit in a railway locomotive and subway traction electrical system, which is especially suitable for various railway locomotives, In the multi-position high-current isolation main circuit in the subway traction electrical system. Background technique [0002] The isolating switch is used as a main component of the insulated metal switchgear in the multi-position high-current isolation main circuit of the railway locomotive and subway traction electrical system. The existing isolating switch mainly uses the knife switch and the two-position transfer switch. There are some defects and deficiencies in some knife switch technologies: [0003] ①The blade-shaped contact structure, the electric field distribution is uneven, and the insulation performance is ...

AI Technical Summary

Problems solved by technology

[0003]①Blade-shaped contact structure, the electric field distribution is uneven, and the insulation performance is greatly affected, which restricts the miniaturization of the high-current knife switch

[0004]②The current contraction of the contact part of the contact is large, and the dynamic stability is poor

[0005]③Limited load capacity, difficult to achieve high current

[0006]④In the case of frequent operation, the contact wears a lot, and the contact pressure is difficult to guarantee continuously

[0007]⑤ The two positions of the knife switch are fixed well, but the three positions cannot be fixed well

[0008]⑥The pressure adjustment of the knife switch changes with the use of materials, which is not convenient for on-site use

[0009]The circuit connection of the two-position transfer switch is too simple, it can only realize the on and off of the circuit, and cannot realize the multi-point on-off of the same wire

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