CN201796717U

CN201796717U - Voltage transformer

Info

Publication number: CN201796717U
Application number: CN2010201826285U
Authority: CN
Inventors: 滕守全; 刘文浩; 荣香倩; 于景艳; 杨福林
Original assignee: Dalian No2 Instrument Transformer Co Ltd
Current assignee: Dalian No2 Instrument Transformer Co Ltd
Priority date: 2010-05-07
Filing date: 2010-05-07
Publication date: 2011-04-13
Anticipated expiration: 2020-05-07

Abstract

The utility model provides a voltage transformer, which includes an AB-phase voltage transformer and a BC-phase voltage transformer. The AB-phase voltage transformer and the BC-phase voltage transformer are both arranged in a metal shielding net, a fuse is mounted between two primary wiring terminals of the AB-phase voltage transformer, the upper end of the fuse is inserted into a pluggable cable joint, another fuse is mounted between two primary wiring terminals of the BC-phase voltage transformer, and the upper end of the fuse is inserted into a corresponding pluggable cable joint. The AB-phase voltage transformer, the BC-phase voltage transformer and the metal shielding net are cast integrally via epoxy resin. The voltage transformer is compact in structure. Since a primary coil and a secondary primary are shielded by the metal shielding net, the appearance potential of the voltage transformer is zero and the voltage transformer can be touched in a live state and is high in safety. Further, by the aid of the pluggable cable joints which can be plugged and unplugged in a live state and used in the voltage transformer, uninterrupted maintenance of the voltage transformer is realized.

Description

A kind of voltage transformer

Technical field

The utility model relates to a kind of instrument transformer, specifically relates to a kind of voltage transformer, and trade name is JSZV12---10RG type voltage transformer.

Background technology

Be used at present that electric railway becomes with case and outdoor ring main unit with the voltage transformer of one of main accessory, adopt exposed fixed wiring, installation, maintenance and use are all inconvenient, owing to supporting case change, sometimes need hotline maintenance and maintenance, human body safety is not ensured.In addition, because the voltage transformer volume that uses is big at present, make case change and outdoor ring main unit volume big.

The utility model content

The purpose of this utility model, provide a kind of compact conformation, volume is little, the coil in the pour mass and the iron core outside have the metallic shield net, can make the instrument transformer surface not charged like this, can charged touch, and once adopting cable joint, can chargedly peg graft, is the high voltage transformer of a kind of security performance.

The technical scheme that adopts is:

A kind of voltage transformer comprises AB phase voltage instrument transformer, BC phase voltage instrument transformer and housing; AB phase voltage instrument transformer comprises iron core, primary winding, secondary coil, and the primary winding winding is on skeleton, and the secondary coil winding is on secondary skeleton; Primary winding is outer, and secondary coil is an internal layer, and coaxial package and is provided with the main insulating layer of being made by insulating paper between primary winding and secondary coil on iron core;

BC phase voltage instrument transformer is structurally identical with AB phase voltage instrument transformer;

AB phase voltage instrument transformer and BC phase voltage instrument transformer together are encapsulated in the metallic shield net, and primary winding, secondary coil and the iron core of two instrument transformers shielded;

AB phase voltage instrument transformer and BC phase voltage instrument transformer poured with epoxy resin structure in aggregates, this epoxy casting body is housing;

Be welded with copper sheathing at AB phase voltage instrument transformer primary winding A end, be used for linking to each other with A phase fuse, the B end of AB phase primary winding links to each other with the B end of BC phase coil and is welded with a copper sheathing, and fuse is continuous mutually with B.The C end of BC phase voltage instrument transformer also is welded with a copper sheathing, and fuse is continuous mutually with C.

Three sleeve-type connectors are arranged after the V-type wiring of this voltage transformer, be used to join American 200A cable plug, band screw fuse is screwed on the cable plug, can charged plug to instrument transformer.

The utility model is two single-phase potential transformer integrators, dwindled installing space effectively, realized that case becomes reduced volume, because it is zero that first and second coil and iron core, make voltage transformer outer surface current potential by metal mesh shield, can chargedly touch, and once use cable joint, hot-pluggable has improved security performance, has realized the maintenance of equipment under live state.

All insulation half buried transformer station

Description of drawings

Fig. 1 is a kind of example structure schematic diagram of the present utility model.

Fig. 2 is primary winding, secondary coil and iron core assembling schematic diagram.

Fig. 3 is a terminal, fuse and the cable joint position cutaway view of present embodiment.

Embodiment

A kind of voltage transformer comprises AB phase voltage instrument transformer 17, BC phase voltage instrument transformer 18 and housing 13.AB phase voltage instrument transformer 17, comprise primary winding 1, secondary coil 4, iron core 7 and fuse 15, primary winding 1 winding is on skeleton 2, secondary coil 4 windings are on secondary skeleton 5, primary winding 1 is outer, secondary coil 4 is an internal layer, and coaxial package is provided with paper main insulating layer 3 between primary winding 1 and secondary coil 4 on iron core 7;

BC phase voltage instrument transformer 18 is structurally identical with AB phase voltage instrument transformer 17;

AB phase voltage instrument transformer 17 and BC phase voltage instrument transformer 18 are packaged in the metallic shield net 6, and by poured with epoxy resin structure in aggregates, this epoxy resin poured body is housing 13;

A terminal group assembly of AB phase voltage instrument transformer 17 comprises A phase primary connection terminal 11, terminal cover 14, fuse 15 and a cable joint 16; A phase primary connection terminal 11 lower ends are inserted a terminal and are overlapped in 14, and be connected with the top of primary winding 1, fuse 15 is band screw rod fuse, fuse 15 places in the middle of two A phase primary connection terminals 11, with screw thread and corresponding primary connection terminal 11 connections, pack in the plug-in cable joint 16 in fuse 15 upper ends respectively at fuse 15 two ends; A terminal assemblies of BC phase voltage instrument transformer 18 a structurally terminal assemblies with AB phase voltage instrument transformer 17 is identical; The top of the end of AB phase voltage instrument transformer 17 and the primary winding of BC phase voltage instrument transformer 18 is connected the B phase of back as voltage transformer; The secondary coil of AB phase voltage instrument transformer 17 and BC phase voltage instrument transformer 18 is connected with corresponding wiring terminal in the secondary terminal board 9 respectively, and secondary terminal board 9 is fixed on the housing 13, and secondary terminal board 9 is provided with secondary line outlet 10;

Housing 13 is fixed on to be installed on the base plate 12, is fixed with suspension bracket 8 on installation base plate 12.

Claims

1. voltage transformer, comprise AB phase voltage instrument transformer (17), BC phase voltage instrument transformer (18) and housing (13), AB phase voltage instrument transformer (17), comprise primary winding (1), secondary coil (4), iron core (7) and fuse (15), primary winding (1) winding is on a skeleton (2), secondary coil (4) winding is on secondary skeleton (5), primary winding (1) is outer, secondary coil (4) is an internal layer, and coaxial package is provided with paper main insulating layer (3) between primary winding (1) and secondary coil (4) on iron core (7); BC phase voltage instrument transformer (18) is structurally identical with AB phase voltage instrument transformer (17), it is characterized in that: AB phase voltage instrument transformer (17) and BC phase voltage instrument transformer (18) are packaged in the metallic shield net (6), and by poured with epoxy resin structure in aggregates, this epoxy resin poured body is housing (13); A terminal group assembly of AB phase voltage instrument transformer (17) comprises AB phase primary connection terminal (11), a terminal cover (14), fuse (15) and cable joint (16); Insert in the terminal cover (14) AB phase primary connection terminal (11) lower end, and be connected with the top of primary winding (1), fuse (15) places in the middle of two AB phase primary connection terminals (11), fuse (15) two ends connect with corresponding primary connection terminal (11) respectively, and fuse (15) upper end is screwed in the plug-in cable joint (16); A terminal assemblies of BC phase voltage instrument transformer (a 18) structurally cross-talk assembly with AB phase voltage instrument transformer (17) is identical; The top of AB phase voltage instrument transformer (17) is as the A end of instrument transformer, and the top of its end and the primary winding of BC phase voltage instrument transformer (18) is connected the B phase of back as instrument transformer, and the end of BC phase coil is as the C end of instrument transformer; The secondary coil of AB phase voltage instrument transformer (17) and BC phase voltage instrument transformer (18) respectively with secondary terminal board (9) in corresponding wiring terminal be connected, secondary terminal board (9) is fixed on the housing (13), secondary terminal board (9) is provided with secondary line outlet (10);

2. a kind of voltage transformer according to claim 1 is characterized in that: housing (13) is fixed on to be installed on the base plate (12), is fixed with suspension bracket (8) on installation base plate (12).