CN202282238U

CN202282238U - Indoor current transformer

Info

Publication number: CN202282238U
Application number: CN2011203078743U
Authority: CN
Inventors: 滕元强; 马玉洁; 宁传仁; 张传城; 施晨沛; 李文东; 李鸿楠
Original assignee: DALIAN HUAXIA TAIKE ELECTRICAL GROUP Co Ltd
Current assignee: DALIAN HUAXIA TAIKE ELECTRICAL GROUP Co Ltd
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2012-06-20
Anticipated expiration: 2021-08-23

Abstract

An indoor current transformer comprises a casing, a primary coil, a secondary coil and an iron core. The primary coil penetrates through the iron core, two ends of the primary coil are respectively connected with two primary wiring boards, two coils windings of the secondary coil is are wound on the iron core, four leads of the two coils windings of the secondary coil are respectively connected with corresponding binding posts in a terminal box, and the terminal box is located on a base of the casing. The casing comprises a substrate, a rectangular upper end cover and a base, a plurality of tower skirts are distributed on the outer wall of the substrate, the substrate, the upper end cover and the base are an integral structure which is made of epoxy resin in a once casting mode, an epoxy resin pouring body is the casing, and a secondary lead terminal box is arranged on the base, and the base of the casing is fixed on a base board. The primary coil, the secondary coil and the iron core are sealed in the epoxy resin casing. The indoor current transformer has the advantages of being large in surface creepage distance, big in secondary output capacity, good in movement and thermal stability and the like.

Description

A kind of indoor current transformer

Technical field

The utility model relates to a kind of current transformer, specifically relates to the big capacity current transformer of a kind of indoor application.

Background technology

A winding of current transformer is connected in the power circuit, and the secondary winding external circuit of current transformer is connected to measuring instrument, instrument or relaying protection or automatic control equipment.At present commercially available current transformer exists that the surface creepage distance is less, the secondary output current capacity is less, and is moving, thermally-stabilised parameter is lower, can not satisfy some specific environments and use.

The utility model content

The purpose of the utility model provides a kind of indoor application current transformer, and the utility model good insulation preformance, surface creepage distance is big, the secondary output current capacity is big, good operating stability.

The technical scheme that adopts is:

A kind of indoor current transformer comprises housing, primary winding, secondary coil and iron core.

Primary winding passes iron core; Its two ends are connected with two primary connection plates respectively; Two windings of secondary coil are wrapped on the iron core, four lead-in wires of two windings of secondary coil respectively with terminal box in corresponding binding post connect, terminal box is positioned on the pedestal of housing.

Housing comprises matrix, upper end cover and pedestal.Upper end cover is a rectangular body, is laid with a plurality of tower skirts on the outer wall of matrix; Matrix, upper end cover and pedestal are the overall structure of epoxy resin one-time cast-forming, and epoxy resin poured body is housing;

On pedestal, be provided with the secondary lead wires terminal box.The pedestal of housing is fixed on the base plate.

Primary winding, secondary coil and iron core are encapsulated in the epoxy resin housing.

The utility model is owing to isolate good insulation preformance, the pour mass good looking appearance of design with epoxy resin with the cast of first and second coil.Advantages such as in addition, it is big that the utility model also has the surface creepage distance, and the secondary output capacity is big and moving, that thermal stability is good.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model.

Fig. 2 is that cutaway view is looked on the left side of Fig. 1.

Fig. 3 is the schematic appearance of the utility model.

Embodiment

A kind of indoor current transformer comprises housing 1, primary winding 2, secondary coil and iron core 3, and secondary coil is made up of first winding 4 and second winding 5.Primary winding 2 is the copper contact rod, and primary winding 2 passes iron core 3, and the two ends of primary winding 2 are drawn coil 6 and connected with corresponding primary connection plate 7 respectively.

First winding 4 and second winding 5 of secondary coil are wrapped in respectively on the iron core 3, two lead-out wires 8 of first winding 4 and two lead-out wires 14 of second winding 5 respectively with secondary coil terminal box 9 in corresponding secondary coil binding posts be connected.

Housing comprises matrix 10, upper end cover 11 and pedestal 12, and upper end cover 11 is a rectangular body, is laid with a plurality of tower skirts 13 on the outer wall of matrix 10.Matrix 10, upper end cover 11 and pedestal 12 are the overall structure of poured with epoxy resin, and epoxy resin poured body is housing 1.Secondary coil terminal box 9 is positioned on the matrix 10, and two primary connection plates are positioned on the sidewall of loam cake 11.

First winding 4 of primary winding 2, secondary coil and second winding 5 and iron core 3 are locked in the housing 1 of poured with epoxy resin, and housing 1 is fixed on the base plate 15.

Claims

1. an indoor current transformer comprises housing (1), primary winding (2), secondary coil and iron core (3), it is characterized in that: secondary coil is made up of first winding (4) and second winding (5); Primary winding (2) is the copper contact rod, and primary winding (2) passes iron core (3), and the two ends of primary winding (2) are drawn coil (6) and connected with corresponding primary connection plate (7) respectively;

First winding (4) of secondary coil and second winding (5) are wrapped in respectively on the iron core (3), and two lead-out wires (8) of first winding (4) are connected with the interior corresponding secondary coil binding post of secondary coil terminal box (9) respectively with two lead-out wires (14) of second winding (5);

Housing comprises matrix (10), upper end cover (11) and pedestal (12), and upper end cover (11) is a rectangular body, is laid with a plurality of tower skirts (13) on the outer wall of matrix (10); Matrix (10), upper end cover (11) and pedestal (12) are the overall structure of poured with epoxy resin, and epoxy resin poured body is housing (1); Secondary coil terminal box (9) is positioned on the matrix (10), and two primary connection plates are positioned on the sidewall of loam cake (11);

First winding (4) of primary winding (2), secondary coil and second winding (5) and iron core (3) are locked in the housing (1) of poured with epoxy resin, and housing (1) is fixed on the base plate (15).