CN201877280U

CN201877280U - Full-dry type capacitive high-voltage current transformer

Info

Publication number: CN201877280U
Application number: CN2010206487988U
Authority: CN
Inventors: 龙素青; 刘明才; 胡丰明
Original assignee: ANHUI INSTRUMENT TRANSFORMER Co Ltd
Current assignee: ANHUI INSTRUMENT TRANSFORMER Co Ltd
Priority date: 2010-12-09
Filing date: 2010-12-09
Publication date: 2011-06-22
Anticipated expiration: 2020-12-09

Abstract

The utility model discloses a full-dry type capacitive high-voltage current transformer which comprises a U-shaped conductor fixed on a carrier, wherein the U-shaped conductor is wrapped by a film tape, a plurality of capacitive screens sequentially wrap the film tape from the top down and are formed into an inverted conical structure, the U-shaped conductor and the capacitive screens are formed into a U-shaped primary winding, a plurality of core coils are respectively sleeved from the top down on both arms of the U-shaped primary winding, and silicon rubber umbrella skirts are sleeved on both arms of the U-shaped primary winding. In the utility model, modified liquid epoxy resin with a curing agent formula is adopted to be a filler, the modified liquid epoxy resin with the curing agent formula is cured after undergoing subsequent vacuum heating treatment, consequently, the leakage of liquid silicone oil is prevented, the problem of the existence of gaps and air gaps between the layers of the primary winding is solved, the partial discharge of the product is reduced, the insulating property of the product is enhanced, and moreover, the product can have high mechanical strength.

Description

Capacitor type dry type high-tension current inductor

Technical field

The utility model relates to the current transformer field, is specifically related to a kind of modification liquid-state epoxy resin solidifying full dry type current transformer.

Background technology

The combined insulated dry current transformer that adopts oriented film to make main insulation is a kind of new transformer of just putting on market in recent years, oil, no gas, no porcelain, volume are little, in light weight, easy for installation because it does not have, anti-explosion fire etc., has obtained rapid popularization after putting on market.A present winding main insulation is that the dry type capacitive current transformer of insulating tape wrapping generally adopts the wrapping of stretched polytetrafluoroethylene film band, the material that is used to get rid of the little air gap of interlayer is the silicone oil that does not solidify, discovery in service is through after a while use, silicone oil can permeate gradually separates out, cause each insulating tape interlayer oil starvation and have air gap, thereby cause product main insulation decreased performance, product office high-volume increases.

The utility model content

The purpose of this utility model provides the capacitor type structure current transformer of a kind of dry type wrapping insulation, and the silicone oil infiltration that can effectively avoid product to move filling between a back winding layers is analysed existing, thereby makes product main insulation keep high-quality insulation property.

The technical solution of the utility model is as follows:

A kind of capacitor type dry type high-tension current inductor, include the U type conductor that is fixed on the carriage, it is characterized in that: the outer wrapping of described U type conductor has the film band, there are a plurality of capacitance plates to wrap up from top to bottom successively outside described film band and form inverted cone-shaped structure, described U type conductor and a plurality of capacitance plate are formed a winding of U type, be respectively installed with a plurality of iron-core coils from top to bottom on two arms of a winding of described U type, described a plurality of iron-core coils are formed secondary coil; Be with casing outside the bottom of a winding of described U type, two arms of a winding of described U type are with the silicon rubber full skirt outward.

Described capacitor type dry type high-tension current inductor is characterized in that: be provided with heat-shrink tube between described U type conductor and the carriage.

Described capacitor type dry type high-tension current inductor is characterized in that: be respectively equipped with insulating washer between the adjacent iron-core coil.

Described capacitor type dry type high-tension current inductor, it is characterized in that: the end of described silicon rubber full skirt is separately installed with terminal block and mount pad, and the bottom of described casing is separately installed with suspension hook and earth stud.

The beneficial effects of the utility model:

The utility model adopts the liquid epoxies of the modification of band hardener formula to make filler, through follow-up vacuum heating treatment, the liquid epoxies of the modification of band hardener formula is solidified, thereby the seepage that does not have liquid silicone oil, solved the situation that has space, air gap between winding layers, reduce the partial discharge of product, improved the insulation property of product, and made product have very high mechanical strength.

Description of drawings

Fig. 1 is an internal structure schematic diagram of the present utility model.

Fig. 2 is an external structure schematic diagram of the present utility model.

Embodiment

Referring to Fig. 1,2, a kind of capacitor type dry type high-tension current inductor, include the U type conductor that is fixed on the carriage 6, the outer wrapping of U type conductor has the stretched polytetrafluoroethylene film band through the liquid epoxies dipping of modification, there are a plurality of capacitance plates to wrap up from top to bottom successively outside the film band and form inverted cone-shaped structure, U type conductor and a plurality of capacitance plate are formed a winding 1 of U type, be respectively installed with a plurality of iron-core coils from top to bottom on two arms of a winding 1 of U type, a plurality of iron-core coils are formed secondary coil 3; Be with casing 7 outside the bottom of a winding 1 of U type, two arms of a winding 1 of U type are with silicon rubber full skirt 8 outward.

Be provided with heat-

shrink tube

4,5 between U type conductor and the carriage; Be respectively equipped with insulating washer 2 between the adjacent iron-core coil; The end of silicon rubber full skirt 8 is separately installed with terminal block 9 and mount pad 10, and the bottom of casing 7 is separately installed with suspension hook 11 and earth stud 12.

When a winding wrapping, the interlayer filler is for adding the liquid epoxies of the modification of hardener formula, through follow-up vacuum drying treatment, between a winding layers, form the cured layer that does not have air gap, thoroughly solved owing to the air gap that forms is separated out in the infiltration of silicone oil.

Claims

1. capacitor type dry type high-tension current inductor, include the U type conductor that is fixed on the carriage, it is characterized in that: the outer wrapping of described U type conductor has the film band, there are a plurality of capacitance plates to wrap up from top to bottom successively outside described film band and form inverted cone-shaped structure, described U type conductor and a plurality of capacitance plate are formed a winding of U type, be respectively installed with a plurality of iron-core coils from top to bottom on two arms of a winding of described U type, described a plurality of iron-core coils are formed secondary coil; Be with casing outside the bottom of a winding of described U type, two arms of a winding of described U type are with the silicon rubber full skirt outward.

2. capacitor type dry type high-tension current inductor according to claim 1 is characterized in that: be provided with heat-shrink tube between described U type conductor and the carriage.

3. capacitor type dry type high-tension current inductor according to claim 1 is characterized in that: be respectively equipped with insulating washer between the adjacent iron-core coil.

4. capacitor type dry type high-tension current inductor according to claim 1, it is characterized in that: the end of described silicon rubber full skirt is separately installed with terminal block and mount pad, and the bottom of described casing is separately installed with suspension hook and earth stud.