On-load capacity-modulating switching contact assembly

Abstract

The invention provides an on-load capacity-modulating switching contact assembly. Each phase of contact assembly comprises an active contact assembly and a transitional contact assembly, wherein the active contact assembly comprises a connecting active contact and active contacts in sliding connection with an upper contact sheet and a lower contact sheet of a switching fixed contact respectively; the transitional contact assembly comprises a connecting transitional movable contact, a transitional resistor and transitional movable contacts in sliding connection with the upper contact sheet and the lower contact sheet of the switching fixed contact respectively; the active contact in sliding connection with the upper contact sheet is in sliding connection with a fixed contact at the tail end by the connecting active contact, and the active contact in sliding connection with the lower contact sheet is connected with a fixed contact at the head end or a neutral point fixed contact by the connecting active contact. Compared with the prior art, the active contact assembly and the transitional contact assembly of the on-load capacity-modulating switching contact assembly share the switching fixed contact, so that the number of the switching fixed contacts capable of meeting recovery voltage among the star-delta switching is reduced minimally, a switching structure is simple and the practicability of the on-load capacity-modulating switching contact assembly is improved.

Description

technical field [0001] The invention relates to a contact assembly, in particular to a contact assembly of an on-load capacity regulating switch. Background technique [0002] The no-load capacity-adjusting transformer is suitable for seasonally changing loads. When it is empty (or light) loaded, it can shift gears to reduce capacity, and reducing the core loss of the transformer has obvious power-saving effects. However, due to the need for manual switching due to power outages, its scope of use is limited, mainly including users in rural areas, forest farms, and salt farms with large changes in power consumption and long change cycles. In order to save energy and reduce consumption, improve power quality, and solve the defect that users cannot obtain stable voltage due to load changes of off-load capacity-regulating transformers, a large number of on-load capacity-regulating transformers have been invested in the power grid, but the capacity of on-load capacity-regulating ...

AI Technical Summary

Problems solved by technology

[0005] ②: The main on-off contact system and the transition contact system of the on-load capacity regulating switch are independent of each other, resulting in an increase in the number of switching static contacts, and more complicated arrangement and connection methods;

[0006] When the voltage level switched by multi-breaks is increased or the capacity regulation and voltage regulation are integrated together, the structure of the entire on-load tap-changer becomes extremely complicated, and production is extremely difficult, and due to high manufacturing costs, it is not conducive to effective Wide application of load regulating switch;

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