CN202796410U

CN202796410U - Outdoor current transformer

Info

Publication number: CN202796410U
Application number: CN 201220251051
Authority: CN
Inventors: 滕元强; 周尉; 李震
Original assignee: HUNAN TAIKE TRANSFORMER CO Ltd
Current assignee: HUNAN TAIKE TRANSFORMER CO Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2013-03-13
Anticipated expiration: 2022-05-31

Abstract

An outdoor current transformer is composed of a primary coil, four winding assemblies of a secondary coil, an iron core and a shell body. The primary coil and the four winding assemblies of the secondary coil are respectively wound on the iron core corresponding to an inner layer and an outer layer. The primary coil is wound on a silicon steel iron core with a flat copper belt, two of the four winding assemblies of the secondary coil are respectively wound on the measuring level ultra crystalline silicon steel iron core in a parallel mode through a round enamelled wire, and the other two of the four winding assemblies of the secondary coil are respectively wound on the protecting level silicon steel iron core through a round copper wire. Two leading wires of the primary coil are respectively connected with the lower ends of two primary coil terminals. The eight leading wires of the four winding assemblies of the secondary coil are respectively connected with the eight terminals of the four winding assemblies of the secondary coil. The outdoor current transformer has the advantages of being scientific and reasonable in design, tight in whole structure, capable of meeting the requirements of the window to increase the secondary output capacity and the dynamic and thermal stability, good in insulation performance, low in cost and wide in application.

Description

Outdoor current transformer

Technical field

The utility model relates to a kind of instrument transformer in the power transformation field, particularly relates to a kind of outdoor current transformer.

Background technology

Current transformer its secondary current and primary current under regular service conditions be actual be directly proportional and method of attachment when correct its phase difference close to zero instrument transformer.

According to the difference of electric power line voltage grade, be provided with enough insulation between first and second winding of current transformer, isolated to guarantee all low-voltage equipments and high voltage.

Electric current in the power circuit is different, configuration by current transformer first and second umber of turn ratio, different line currents can be transformed into less standard current value, generally be 5A or 1A, can reduce like this instrument and relay size, simplify its specification.

Present commercially available outdoor current transformer, first and second coil space is less, the secondary output capacity is little, and moving, thermal stability is relatively poor.

Summary of the invention

The purpose of this utility model, it is large to provide a kind of secondary output capacity, the outdoor current transformer moving, that thermal stability is good.

The utility model is realized with following mode:

A kind of outdoor current transformer, four windings, iron core and epoxy resin poured body comprising primary winding, secondary coil, primary winding is wound on the silicon sheet core with the flat copper band, four windings of secondary coil wherein two windings are measuring on the level ultracrystallite silicon sheet core with circle enamelled wire difference parallel winded, and two other winding is wound on respectively on the protected level silicon copper sheet iron core with circular copper wire; Two lead-in wires of primary winding respectively with the corresponding connection of binding post of two primary windings; Eight lead-in wires of four windings of secondary coil respectively with the corresponding connection of eight binding posts of secondary coil; Four windings of primary winding, secondary coil and iron core are by poured with epoxy resin structure in aggregates, expose two primary winding binding posts and eight secondary coil binding posts, wherein epoxy resin poured body is housing, epoxy resin poured body top is resin umbrella post, and epoxy resin poured body is fixedly connected with base by bolt.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of outdoor current transformer.

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

Fig. 3 is the schematic appearance of outdoor current transformer.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

The utility model outdoor current transformer comprises four winding 2a, 2b, 2c, 2d and

iron core

3,3a, 3b, 3c, the 3d of primary winding 1, secondary coil; Primary winding 1 usefulness flat copper band is wound on the silicon sheet core 3, four windings of secondary coil wherein two winding 2a, 2b are measuring on level ultracrystallite silicon sheet core 3a, the 3b with circle enamelled wire difference parallel winded, and two other winding 2c, 2d are wound on respectively on protected level silicon copper sheet iron core 3c, the 3d with circular copper wire; Two of primary winding lead-in wires 12 respectively with the binding post 4 corresponding connections of two primary windings; Four winding 2a, 2b of secondary coil, 2c, 2d eight lead-in wires 5 respectively with eight binding posts, the 6 corresponding connections of secondary coil; Use poured with epoxy resin structure in aggregates after four winding 2a, 2b, 2c, 2d and

iron core

3,3a, 3b, 3c, the 3d of primary winding 1, secondary coil lays, wherein epoxy resin poured body 7 is housing, and epoxy resin poured body 7 tops are resin umbrella post 8; Epoxy resin poured body 7 bottoms one sidewall has secondary coil terminal chamber 9, eight secondary coil binding post 6 bared ends are positioned at secondary coil terminal chamber 9, terminal chamber 9 is provided with cover plate 10, and cover plate 10 is fixedly connected with epoxy resin poured body 7 by double-screw bolt.Epoxy resin poured body 7 is fixedly connected with base 11 by bolt.

Claims

1. outdoor current transformer, four windings (2a, 2b, 2c, 2d), iron core (3) and the epoxy resin poured body (7) that comprise primary winding (1), secondary coil, it is characterized in that: primary winding (1) is wound on the silicon sheet core (3) with the flat copper band, four windings of secondary coil wherein two windings (2a, 2b) are measuring on the level ultracrystallite silicon sheet core (3a, 3b) with circle enamelled wire difference parallel winded, and two other winding (2c, 2d) is wound on respectively on the protected level silicon copper sheet iron core (3c, 3d) with circular copper wire; Two lead-in wires (12) of primary winding (1) respectively with the corresponding connection of binding post (4) of two primary windings (1); Eight lead-in wires (5) of four windings (2a, 2b, 2c, 2d) of secondary coil respectively with the corresponding connection of eight binding posts (6) of secondary coil; Four windings (2a, 2b, 2c, 2d) of primary winding (1), secondary coil and iron core (3a, 3b, 3c, 3d) are by poured with epoxy resin structure in aggregates, expose two primary winding binding posts (4) and eight secondary coil binding posts (6), wherein epoxy resin poured body (7) is housing, epoxy resin poured body (7) top is resin umbrella post (8), and epoxy resin poured body (7) is fixedly connected with base (11) by bolt.