CN201045715Y

CN201045715Y - Porcelain housing dry type mutual inductor

Info

Publication number: CN201045715Y
Application number: CNU2007200845431U
Authority: CN
Inventors: 梁胜
Original assignee: WUHAN HENGTAI HIGH-PRESSURE ELECTRICAL APPARATUS EQUIPMENT Co Ltd
Current assignee: WUHAN HENGTAI HIGH-PRESSURE ELECTRICAL APPARATUS EQUIPMENT Co Ltd
Priority date: 2007-05-08
Filing date: 2007-05-08
Publication date: 2008-04-09
Anticipated expiration: 2017-05-08

Abstract

A porcelain casing dry-type mutual inductor comprises an electric voltage mutual inducting iron core and a winding coil (4), a current flow mutual inducting iron core and a winding coil (7), a base (8), and a casing which is arranged on the base. The utility model is characterized in that the cores of the mutual inductors and the winding coils are arranged in a columnar porcelain casing, and the space of the porcelain casing and the iron cores and the winding coils is filled with a solid insulating filling body (3), the outer wall (5) of the porcelain casing is umbrella skirt shaped, and the iron core winding high-voltage lead wire end is directly led out adopting an electric cable (1). Adopting the columnar umbrella shirt shaped casing as the box body of the mutual inductors, the utility model has the advantages of strong weatherability, high insulating grade, static-free, maintenance-free, compact structure, and excellent sealing performance, and the solid insulating filling body in the porcelain casing does not contact with the outside world, which does not leak and pollute the environment. The utility model is applied to the three-phase alternating current electrified wire netting with specified voltages of 6 KV or 10KV or 35KV or more than those voltages and with the specified frequency of 50Hz.

Description

The ceramic shell dry type mutual inductor

Technical field

The utility model relates to electric power mutual-inductor, especially a kind of ceramic shell dry type mutual inductor that is used for electric power system.

Background technology

Instrument transformer is divided into current transformer, voltage transformer from classification, and electric current, voltage combined instrument transformer are oil immersed type instrument transformer, dry type mutual inductor from be divided in form.Instrument transformer is an indispensable equipment of implementing electric power system electrical control, measurement, electric energy measuring management and relaying protection, is the hinge that connects electric secondary circuit and power high voltage system.Oil immersed type instrument transformer product is made up of metal shell, case lid, rubber cushion, base, oil ga(u)ge, inlet valve, fuel outlet valve, conservator etc., the screw rod crimping of casing and case lid, base, at casing and case lid periphery crimping rubber cushion, long period uses rubber cushion aging easily, after rubber cushion is aging sealing is descended, reduce dielectric strength, cause into water, oil seepage, cause environmental pollution easily, have potential safety hazard, necessary periodic oil change, change parts.

Dry type mutual inductor adopts macromolecular materials such as epoxy resin, silicon rubber to make casing more, a little less than this material anti-uv-ray, is subjected to the sunlight direct projection for a long time, easily aging, cracking.Long-term use dielectric strength can occur and descend, and causes insulation breakdown, absorption dust, produces the defective of accident potential.

Summary of the invention

The purpose of this utility model provide a kind of anti-aging, dielectric strength is high, weather-proof strong ceramic shell dry type mutual inductor, to improve useful life, the security performance and easy to maintenance of instrument transformer.

Described ceramic shell dry type mutual inductor comprises voltage transformer iron core and winding coil, current transformer core and winding coil, base, be located at the shell on the base, it is characterized in that: the iron core of described instrument transformer and winding coil are arranged in the column ceramic shell, be filled with solid-state insulation pouring material in the space between ceramic shell and iron core and the winding coil, the outer wall of ceramic shell is the full skirt shape, in order to increase creepage distance.

Owing to adopted the casing of pillar full skirt shape ceramic shell as instrument transformer, therefore it is strong to the utlity model has weatherability, class of insulation height, no static, non-maintaining advantage, its compact conformation, good airproof performance, solid-state insulation bottling body in the ceramic shell does not contact with the external world, can not leak nonpollution environment.Be suitable for 6,10, the three-phase alternating current of 35kV or above rated voltage, rated frequency 50HZ uses on the net.

Description of drawings

Fig. 1 is the described instrument transformer structural representation of current/voltage composite type;

Fig. 2 is the described instrument transformer example structure of a current type schematic diagram;

Fig. 3 is the described instrument transformer example structure of a voltage-type schematic diagram.

Embodiment

In the described instrument transformer structural representation of the current/voltage composite type of Fig. 1, described ceramic shell dry type mutual inductor comprises voltage transformer iron core and winding coil 4, current transformer core and winding coil 7, base 8, be located at the shell on the base, the iron core of instrument transformer and winding

coil

4,7 are arranged in the column ceramic shell 2, be filled with solid-state insulation bottling body 3 in the space between ceramic shell and iron core and the winding coil, the outer wall 5 of ceramic shell is the full skirt shape, in order to increase the creepage distance between pigtail splice 1 and the base 8.

Fig. 2,3 is respectively current type and the described instrument transformer example structure of voltage-type schematic diagram.The utility model can be made the current type instrument transformer separately and use, and also can make the voltage-type instrument transformer separately, also or adopt Fig. 1 to show that scheme electric current, voltage are used in combination.

Iron core winding high-voltage connection end among Fig. 1,2,3 adopts cable 1 directly to draw, and substitutes traditional binding post (row), and the outside, joint is joined the insulating sleeve sealing and prevented to expose, and so can have anti-electricity-theft, anti-short-circuit function.

Claims

1. ceramic shell dry type mutual inductor, comprise voltage transformer iron core and winding coil, current transformer core and winding coil, base, be located at the shell on the base, it is characterized in that: the iron core of described instrument transformer and winding coil are arranged in the column ceramic shell, be filled with solid-state insulation bottling body in the space between ceramic shell and iron core and the winding coil, the outer wall of ceramic shell is the full skirt shape.

2. ceramic shell dry type mutual inductor as claimed in claim 1, it is characterized in that: in described instrument transformer ceramic shell, be provided with voltage transformer iron core and winding coil, or current transformer core and winding coil, or voltage, current combined transformer iron core and winding coil.