CN202134393U

CN202134393U - Outdoor current transformer

Info

Publication number: CN202134393U
Application number: CN201120227021U
Authority: CN
Inventors: 张敬海; 屠定显; 罗春年
Original assignee: SHANGHAI YIKAI ELECTRIC GROUP CO Ltd
Current assignee: SHANGHAI YIKAI ELECTRIC GROUP CO Ltd
Priority date: 2011-06-30
Filing date: 2011-06-30
Publication date: 2012-02-01
Anticipated expiration: 2021-06-30

Abstract

The utility model relates to an outdoor current transformer which adopts compound insulation of epoxy resin and rubber. In the outdoor current transformer, an iron core, a primary winding, a secondary winding, a primary binding post and a secondary junction box are cast into an integrated structure composed of the primary winding high voltage insulator, the secondary winding low voltage insulator, the primary binding post and the secondary junction box. The integrated structure is arranged on a base. An insulating platform is arranged outside the bottom of the primary binding post, a main umbrella skirt is distributed at the exterior of the primary winding high voltage insulator, and an auxiliary shed is distributed at the exterior of the secondary winding low voltage insulator. The utility model adopts the integrated structure formed by compound insulation of the epoxy resin and the rubber so as to have better ultraviolet ray resistance and weather-proof performance, the service life is prolonged, and the outdoor current transformer does not need frequent periodic maintenance. Meantime, the pollution flashover voltage is improved so as to effectively avoid the pollution flashover fault, and the volume is small, so that the outdoor current transformer is easy to install.

Description

A kind of Outdoor Current Transformer

Technical field

The utility model relates to the correlative technology field of electric equipment, is specifically related to a kind of Outdoor Current Transformer.

Background technology

Current transformer is according to electromagnetic induction principle, is made up of the iron core and the winding of closure.Outdoor Current Transformer is an equipment of measuring electric current, electric energy or relaying protection in the electric power system.In the Outdoor Current Transformer that existing electric power system is used; The general current transformer that adopts paper oil insulation and magnetic bottle insulation; Exist shortcomings such as volume is big, seepage is oily, be prone to pollution flashover, the dynamic and thermal stability electric current is low, thereby this kind product needs regularly to safeguard especially and maintenance that working life is low; Adopt the current transformer of ordinary epoxy resin insulation in addition, though solved that volume is big, no oiling, problem that the dynamic and thermal stability electric current is low, also unresolved wind erosion-resistance performance is poor, UV resistant shines, working life is low, safeguard and overhaul loaded down with trivial details problem.

The utility model content

To above-mentioned defective, the purpose of the utility model provides a kind of Outdoor Current Transformer, and existing Outdoor Current Transformer wind erosion-resistance performance is poor to solve, UV resistant irradiation, working life are low, safeguard and overhaul loaded down with trivial details technical problem.

For realizing above-mentioned purpose, the technical scheme below the utility model has adopted:

A kind of Outdoor Current Transformer; Comprise iron core, be set around winding and secondary winding on the iron core, by an extended primary connection terminal of winding and secondary connection box that the secondary connection terminal is housed; Said iron core, winding, secondary winding, primary connection terminal and secondary connection box adopt epoxy resin and rubber combined insulation pouring to form an integral structure of being made up of winding high voltage insulator, secondary winding low-voltage insulation body, primary connection terminal, a secondary connection box; This integral structure integral installation is on base; Be provided with insulation pad outside the bottom of said primary connection terminal; The exterior portions of a said winding high voltage insulator is furnished with the main chute skirt, and the exterior portions of secondary winding low-voltage insulation body is furnished with attaches full skirt.

According to the described Outdoor Current Transformer of the utility model preferred embodiment, its binding post is two vertical tabular terminals, and this primary connection terminal is provided with installing hole.

Owing to adopted above technical characterictic, make the utility model than prior art, have following advantage and good effect:

A) integrative-structure that adopts epoxy resin and rubber combined insulation to form; Because elastomeric material has good hydrophobicity and migration of hydrophobicity life-span; Has good anti-ultraviolet property; So the current transformer of the utility model has preferable uvioresistant and wind erosion-resistance performance, has prolonged useful life, do not need frequent periodic maintenance yet.

B) integrative-structure that adopts epoxy resin and rubber combined insulation to form, and be provided with one-time formed insulation pad, when normal operation, can effectively avoid influencing the precision of metering owing to the short-channel of rainwater, conduction dirt formation binding post; Rubber insulation material has good resistant and dodges performance, has improved pollution flashover voltage widely, can prevent the generation of pollution flashover fault effectively.

C) volume is little, can be widely used in outdoor newly-increased circuit of electric power system or the transformation circuit, and the primary connection terminal is vertically tabular and has installing hole, is convenient to be installed in the outdoor environment.

Description of drawings

Fig. 1 is the utility model internal cross section structural representation;

Fig. 2 is the utility model external structure sketch map;

Fig. 3 is the lateral plan of Fig. 2.

Embodiment

For ease of understanding, the preferred embodiment of the utility model is done being described in further detail below in conjunction with accompanying drawing.

A kind of Outdoor Current Transformer; Shown in Fig. 1-3; Comprise iron core 1; Be set around a winding 2 on the iron core 1, secondary winding 3 and by the extended primary connection terminal of winding 24, be installed in the secondary connection box 5 of secondary connection terminal, above-mentioned each parts adopt epoxy resin and rubber combined insulation and into a single integrated structure, integral installation is on base 6.Primary connection terminal 4 is two vertical tabular binding posts that have installing hole 10, is installed in the outdoor environment, can install smoothly with the plate-shaped bus-bars terminal board easily and reliably; The bottom periphery of primary connection terminal 4 is provided with one-time formed insulation pad 7, when normal operation, can effectively avoid influencing the precision of metering owing to the short-channel of rainwater, conduction dirt formation binding post; Be distributed with uniform main chute skirt 8 above being packaged in the outside high voltage insulator of winding 2, be packaged in secondary winding 3 outside external being distributed with of low-voltage insulation and attach full skirt 9,, prevent pollution flashover voltage to increase insulation level.

The utility model be adopt that epoxy resin and rubber combined insulation form, volume is little, resistant sudden strains of a muscle, high dynamic and thermal stability electric current, UV resistant wind erosion, maintenance period is long, the life-span is long, can be widely used in the electric power system open air and increase newly in circuit or the transformation circuit.The utility model Outdoor Current Transformer designs according to GB, adopts and rolls iron core, utilizes the electromagnetic conversion principle, makes the secondary current situation of change of reflected measurement primary current exactly, is transferred to secondary measurement and control device; Product directly is installed in the power circuit, uses as electric current, electric energy measurement and relaying protection.

More than disclosed only be the preferred embodiment of the utility model; But be not to be used for limiting itself, anyly have the knack of those skilled in the art, under the situation of the utility model spiritual connotation; The equalization of being done changes and changes, and all should drop in the protection range of the utility model.

Claims

1. Outdoor Current Transformer; Comprise iron core, be set around winding and secondary winding on the iron core, by an extended primary connection terminal of winding and secondary connection box that the secondary connection terminal is housed; It is characterized in that: said iron core, winding, secondary winding, primary connection terminal and secondary connection box adopt epoxy resin and rubber combined insulation pouring to form an integral structure of being made up of winding high voltage insulator, secondary winding low-voltage insulation body, primary connection terminal, a secondary connection box; This integral structure integral installation is on base; Be provided with insulation pad outside the bottom of said primary connection terminal; The exterior portions of a said winding high voltage insulator is furnished with the main chute skirt, and the exterior portions of secondary winding low-voltage insulation body is furnished with attaches full skirt.

2. Outdoor Current Transformer according to claim 1 is characterized in that: described primary connection terminal is two vertical tabular terminals, and this terminal is provided with installing hole.