CN205984624U

CN205984624U - Current inducer

Info

Publication number: CN205984624U
Application number: CN201620800359.1U
Authority: CN
Inventors: 周上博; 郭芳乾; 王辉; 王欣; 金叶志
Original assignee: ZHEJIANG ELECTRIC Co LTD TIANAN ELECTRICAL GROUP
Current assignee: ZHEJIANG ELECTRIC Co LTD TIANAN ELECTRICAL GROUP
Priority date: 2016-07-27
Filing date: 2016-07-27
Publication date: 2017-02-22
Anticipated expiration: 2026-07-27

Abstract

The utility model discloses a current inducer, including first conductor unit, second conductor unit, the exchangeable unit of electric current and transition casing, the exchangeable unit of electric current is adorned on first conductor unit, and first conductor unit and second conductor unit pass through the transitional crust body coupling. The utility model discloses in, the last coil of current inducer adopts sleeved type fixed, can adjust relevant part height according to actual coil turns and parameter, avoids spare part unnecessary extravagant, conductor connecting seat in the first conductor unit in conductor and the second conductor unit passes through the spiral spring intercommunication, except that being used for the through -flow primary coil that still is used as, the conductor directly passes the sleeve, and the sleeve terminal surface is equipped with the equalizer ring, can improve field distribution well, ensures that the product is reliable. The utility model has the advantages that the whole structure is simple single, the part is small in quantity, and the assembly is simple and convenient, can have good reliability and economic nature according to practical application adjustment height.

Description

A kind of current transformer

Technical field

The utility model is related to a kind of transformer element, especially a kind of current transformer.

Background technology

Cubicle Gas-Insulated Switchgear (GIS) is for switching regular link or fault wire in a kind of power system The important comprehensive function complete set of equipments on road, current transformer is one of eight big elements of GIS, has protection, measurement and metering and makees With its importance is self-evident.

The function of current transformer is that by certain no-load voltage ratio, primary current larger for numerical value is converted to numerical value is less Secondary current, for the purposes such as being protected, being measured and measured.The current transformer being 400/5 as no-load voltage ratio, reality can be The electric current of 400A is changed into the electric current of 5A.

At present, the structure of current transformer is mainly by following two：

The first structure is three-phase separate case structure, and this structure is mainly the gas-insulated metal envelope coordinating three-phase separate-box type Close switchgear, because the Cubicle Gas-Insulated Switchgear floor space of three-phase separate-box type is big, be unfavorable for becoming in soil Promote in this high transformer station.And during using this structure, when once electric current passes through, the housing of GIS all can induce phase The electric current answered, it is desirable to have special ground structure.

Second structure is full Threephase common-box structure, with triangle disposition arrangement, shell during center conductor output in this structure Internal three-phase primary current value preset is zero, can avoid producing induced-current on GIS housing.Threephase common-box structure can subtract effectively Few small product size, but complex structure, product gap is little, and Product Assembly difficulty is larger.

Utility model content

In order to overcome the deficiencies in the prior art, the utility model provides a kind of simplification structure, improves assembly difficulty, reduces The current transformer of small product size.

Technical solutions of the utility model are：A kind of current transformer, including the first conductor element, the second conductor element, electricity Stream mutual inductance unit and transitional shell, described Current Mutual Inductance unit is loaded on the first conductor element, the first conductor element and the second conductor Unit is coupled by transitional shell.

Wherein, described first conductor element includes：First end socket, the first insulator and conductor, described conductor totally three, point It is not installed on the first insulator, the first insulator is coupled with the first end socket.

Wherein, described second conductor element includes：Second end socket, the second insulator and conductor connection seat, described conductor connection Joint chair is three, is installed in respectively on the second insulator, the second insulator is coupled with the second end socket.

Wherein, described Current Mutual Inductance unit includes：Receiver, coil, packing ring, pillar and pressing plate, described mounting coil in On receiver, described pressing plate is used for pushing down coil, and pressing plate is loaded on receiver by pillar, described coil and coil, coil and It is respectively provided with packing ring between receiver, coil and pressing plate.

Wherein, described receiver includes sleeve and bearing, totally three, described sleeve, is welded on bearing, sleeve inner has Conductor passes through, and both are coaxially arranged, and sleeve ends are provided with grading ring.

Wherein, also include junction block, described junction block is installed in transitional shell.

The beneficial effects of the utility model are：Three conductors are arranged in receiver, can optimize Electric Field Distribution to greatest extent； Current transformer overall structure is simple, and number of parts is few, assembles flexible and convenient；Meanwhile, this current transformer can be answered according to actual With in coil total height, personalized customization correlated parts height, it is to avoid waste of material.

Brief description

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

Fig. 2 is the left view of Fig. 1.

Specific embodiment

Below in conjunction with the accompanying drawings the utility model is further described：

As depicted in figs. 1 and 2, the present embodiment includes the first conductor element 1, the second conductor element 2, Current Mutual Inductance unit 3 With transitional shell 4；

First conductor element 1 includes the first end socket 11, the first insulator 12 and conductor 13, and wherein conductor 13 includes contact tube 131 and First Transition conductor 132, connected by screw threads for fastening between the two, for preventing thread looseness, contact tube 131 is twisted Enter at least one holding screw, the first conductor element 1 has three conductors 13, is loaded on respectively on the first insulator 12, first is exhausted Edge 12 is connected with the first end socket 11 surface-to-surface；

Current Mutual Inductance unit 3 includes receiver 31, coil 32, pillar 33, pressing plate 34, packing ring 35 and grading ring 36；Wherein Receiver 31 is welded by three sleeves 312 and forms on bearing 311, and receiver 31 fixation is loaded on the first end socket 11, coil 32 It is set on receiver 31, along the freedom of motion of sleeve 311 axial direction, pressing plate 34 leads to compress simultaneously limiting coil 32 using pressing plate 34 Cross pillar 33 fixation to be loaded on receiver 31, between coil 32 and coil 32, between coil 32 and receiver 31, coil 32 and pressure All it is lined with packing ring 35 between plate 34 to be isolated；For improving Electric Field Distribution, at sleeve end face, it is cased with grading ring, and use clamp screw Follow closely spacing fastening.

Second conductor element 2 includes the second end socket 21, the second insulator 22 and conductor connecting seat 23, wherein conductor connecting seat 23 are made up of contact base 231 and the second transition conductor 232, are fastened by screw between the two, the second conductor element 2 has three Conductor connecting seat 23, fixation respectively is loaded on the second insulator 22, and the second insulator 22 is connected with the second end socket 21 surface-to-surface；

Connect and play a supportive role by transitional shell 4 between first conductor element 1 and the second conductor element 2, conductor 13 The connection contact 24 passing through and conductor connecting seat 23 between in contact base 231 connects into path, also serves as in addition to through-flow Primary winding.

In actual applications, because the quantity of coil 32 and the parameter of each coil 32 are not quite similar, lead to coil total height It is not quite similar, for reducing the waste of current transformer inner space, contact tube 132, sleeve 312, pillar 33 and mistake as far as possible The height crossing housing 4 will be adjusted accordingly optimization according to coil total height, and the junction block 5 being simultaneously loaded in transitional shell also can root Number of connections according to coil is adjusted accordingly.

In the utility model, the coil 32 on current transformer is fixed using suit mode, and unconventional cast-type is solid Determine so that assembling process is convenient flexibly；Pass through conductor 13 in sleeve, conductor surrounding electric field can be effectively improved, grading ring Application can optimize the Electric Field Distribution between conductor and sleeve further, farthest increases the service life.In addition, current transformer Correlated parts height can be adjusted at any time according to practical application, unnecessary waste can be avoided；Along with overall structure is simple, part Quantity is few, and assembling is easy, has good stability and economy.

Claims

1. a kind of current transformer, including the first conductor element, the second conductor element, Current Mutual Inductance unit and transitional shell, its It is characterised by：Described Current Mutual Inductance unit is loaded on the first conductor element, and the first conductor element and the second conductor element pass through transition Housing couples.

2. current transformer according to claim 1 it is characterised in that：Described first conductor element includes：First end socket, First insulator and conductor, described conductor totally three, it is installed in respectively on the first insulator, the first insulator and the first end socket join Connect.

3. current transformer according to claim 1 it is characterised in that：Described second conductor element includes：Second end socket, Second insulator and conductor connection seat, described conductor connection seat is three, is installed in respectively on the second insulator, the second insulator Couple with the second end socket.

4. current transformer according to claim 1 it is characterised in that：Described Current Mutual Inductance unit includes：Receiver, line Circle, packing ring, pillar and pressing plate, on receiver, described pressing plate is used for pushing down coil to described mounting coil, and pressing plate is filled by pillar On receiver, between described coil and coil, coil and receiver, coil and pressing plate, it is respectively provided with packing ring.

5. current transformer according to claim 4 it is characterised in that：Described receiver includes sleeve and bearing, described Totally three, sleeve, is welded on bearing, sleeve inner has conductor to pass through, and both are coaxially arranged, and sleeve ends are provided with grading ring.

6. current transformer according to claim 1 it is characterised in that：Also include junction block, described junction block is installed in In transitional shell.