R-type discharge coil

Abstract

Provided is an R-type discharge coil. The R-type discharge coil is formed by encapsulating of an R-type iron core, a first winding, a secondary winding, a high-voltage terminal, a low-voltage terminaland epoxy resin. The first winding and the second winding are formed by winding of F-grade copper enamelled wires. The secondary winding winds around the insulated R-type iron core. The first windingwinds around an epoxy framework. The first winding is connected with the high-voltage terminal. The secondary winding is connected with the low-voltage terminal. An overall machine body is made by vacuum casting of the outdoor epoxy resin which is weather-proof and ultraviolet ray-resistant. The R-type iron core adopts one strip of oriented silicon steel sheet band material which is continuous. The strip of oriented silicon steel sheet band material winds around an exclusive die and is composed of two-stage or three-stage iron core with different widths. The R-type discharge coil is compact in overall structure, high in anti-short circuit impact capability, low in zero load current, zero load loss, noise and calorific value and is resistant to rust without sharp corners and tip stress. Therefore, an internal electric field of a product is uniform without point discharge phenomenon. partial discharge meets the requirement.

Description

technical field [0001] The invention relates to a discharge coil applied in a power system, in particular to an R-shaped discharge coil. Background technique [0002] In the power system, the discharge coil is connected in parallel with the high-voltage shunt capacitor to discharge the residual charge of the capacitor bank in a short time. When the discharge coil has a secondary, it can also be used as a voltage measurement and provide a voltage signal for the relay device. [0003] Most of the existing discharge coils use rectangular silicon steel sheets, which adopt a laminated structure or an open C-shaped core structure, and there is also a new type of amorphous alloy structure. Laminated core processing is cumbersome, lamination assembly efficiency is low, there will be shearing burrs on the four end faces of the core pieces, and there will be assembly air gaps between the pieces, which will directly cause no-load current, large loss, and large noise; Due to the uneven...

AI Technical Summary

Problems solved by technology

Laminated iron core processing is cumbersome, lamination assembly efficiency is low, there will be shear burrs on the four end faces of the core sheet, and there is an assembly air gap between the sheets, which will directly cause no-load current, large loss, and large noise; Due to the uneven contact surface of the C-type iron core, there is a large air gap, which will cause severe vibration of the iron core and local magnetic saturation, resulting in a sharp increase in no-load current and loss, endangering the safe operation of the product, and easily causing electrical accidents; The raw material technology is not yet mature, the mechanical bearing capacity of this material is very low, and the structural layout is unreasonable. At present, it is only an industry gimmick, without batch promotion and wide practicability, and cannot be used in batches in the power industry and related supporting industries.

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