On-load capacity-adjusting switch high voltage primary loop structure

Abstract

The invention discloses an on-load capacity-adjusting switch high voltage primary loop structure which comprises an insulating plate (1), three resistors (3), a first main contact (4), a second main contact (6), a first transition contact (8), a second transition contact (10), a first static contact (12), a second static contact (13), a third static contact (14) and a fourth static contact (15), wherein the three resistors (3) are connected in series through resistor inserts (2), and the first static contact (12), the second static contact (13), the third static contact (14) and the fourth static contact (15) are respectively fixed on an insulating barrel (11). The on-load capacity-adjusting switch high voltage primary loop structure is reasonable in whole structural design. Reliable arc blowout can be achieved, the number of parts of a single product is small, materials can be saved, installing steps are reduced, installation is simple and convenient, cost is saved, connecting wires are distributed along a groove, a part of a connecting part is poured in materials of epoxy resin, circuit layout is reasonable, star angle conversion can be stably finished, operation is stable, use is safe, a service life is long, and an application range is wide.

Description

technical field [0001] The invention relates to a power equipment device, in particular to a high-voltage primary circuit structure of an on-load capacity-regulating switch for adjusting the capacity of a capacity-regulating transformer according to load changes under load conditions. Background technique [0002] The on-load automatic capacity-adjusting transformer is a distribution transformer with two types of rated capacity, and the operation mode of the two rated capacities can be automatically converted. The transformer includes a shell, a high-voltage winding and a low-voltage winding installed in the shell. The high-voltage primary circuit structure of the on-load capacity regulating switch and the capacity regulating control device are installed on the shell. The capacity regulating control device automatically detects and judges the user's load. When the transformer is not powered off, the above two capacities are automatically switched through the high-voltage pr...

AI Technical Summary

Problems solved by technology

However, the high-voltage primary circuit structure of the on-load capacity-adjusting switch in the prior art, when the transformer is loaded, it is necessary to complete the switching of the transformer winding, and there is often a technical problem that it is difficult to achieve reliable arc extinguishing when the high-voltage side contacts are switched in the star angle.

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