CN201340794Y

CN201340794Y - High-voltage current transformer

Info

Publication number: CN201340794Y
Application number: CNU2008201672862U
Authority: CN
Inventors: 王晓东; 孙峻岩
Original assignee: HANGZHOU BH ELECTRIC APPARATUS CO Ltd
Current assignee: HANGZHOU BH ELECTRIC APPARATUS CO Ltd
Priority date: 2008-11-03
Filing date: 2008-11-03
Publication date: 2009-11-04
Anticipated expiration: 2018-11-03

Abstract

The utility model relates to a high-voltage current transformer, which consists of two circular iron cores. The two circular iron cores have the same inside diameter and outside diameter but different heights; measured level and protected level secondary coils are respectively wound on the two iron cores; a primary coil passes through the centers of the two secondary coils; the primary coil is connected with a connecting block end to end and the connecting block is led out of the top; the heads and the ends of the two secondary coils are arranged on a cylinder on the lower part; and the primary coil and the secondary coils form a transformer core which is put into a mould and positioned and fixed and is vacuumed and poured with electrical epoxide resin. The high-voltage current transformer is of a cylinder shape; a skirt edge belt is arranged on the periphery of the high-voltage current transformer; the lower part of the high-voltage current transformer is a cylinder but no skirt edge is arranged; outgoing line piles of the secondary coils are arranged on the cylinder on the lower part; and an outgoing line pile of the primary coil is arranged on the top. The high-voltage current transformer has compact structure, high efficiency, small volume, light weight, material saving and cost reduction.

Description

A kind of high-tension current inductor

Technical field

The utility model belongs to high-tension current inductor manufacturing technology field.

Background technology

At present used high-tension current inductor all is to roll into annular core by silicon steel sheet, coiling secondary coil and draw and connect the secondary connection pile crown on iron core; Primary winding passes the secondary coil center, and the end of a thread is drawn connection primary connection pile crown; Primary winding and secondary coil external application insulating paper or insulating tape wrapping are isolated, and adorn mould pouring epoxy resin then and form; Existing high-tension current inductor volume is big, and weight is also heavy, and as the about 80Kg of FLZN-27.5 type current transformer net weight, the utility model adopts annular iron core, shortens the length of magnetic path, thereby raises the efficiency reduced volume, reduces cost.

The utility model content

It is many with material that the purpose of this utility model is to overcome the existing big Heavy Weight of high-tension current inductor volume, the deficiency that cost is high; The utility model relates to a kind of annular iron core, shortens magnetic circuit, raise the efficiency, thus reduced volume, raw material are saved in weight reduction, reduce cost; The utility model is by two annular iron cores, external diameter unanimity in it, and highly different; Respectively level secondary coil and protected level secondary coil are measured in coiling on iron core, and at two secondary coil outsourcing half lap layer crimped paper and semiconductor adhesive tapes, two secondary coils lead-out wire are end to end received in the secondary connection stake, and two secondary coils side by side; Primary winding passes the center of two secondary coils, and drawing end to end of primary winding received on the primary connection square, and primary winding also wraps crimped paper and semiconductor adhesive tape, the synthesizer heart outward; The device heart places mould positioning and fixing dress mould; In vacuum chamber, vacuumize then, high insulating electrical epoxy resin composition is poured in the mould solidified forming; The utility model contour structures is a cylinder, and periphery has the shirt rim band, and two primary connection squares are arranged at the cylinder top, the cylinder bottom also is a cylinder, and periphery does not have the shirt rim band, and secondary connection stake and earth connection stake are arranged, also have protective cover and cylinder loose joint, cover secondary connection stake and ground wire stake; The utility model advantage is: iron core is an annular, and magnetic circuit shortens, and efficient improves, thereby dwindles core volume and weight; Because the vertical structure side by side of the device heart, under the isolation distance condition of guaranteeing to insulate, the complete machine compactness, the raw material of saving reduce cost.

Description of drawings

Accompanying drawing 1 is a kind of device heart front view of high-tension current inductor;

Accompanying drawing 2 is device heart end views of a kind of high-tension current inductor;

Accompanying drawing 3 is cast overall diagram of a kind of high-tension current inductor;

Accompanying drawing 4 is vertical views of a kind of high-tension current inductor;

Embodiment

Accompanying drawing 1,1 is primary winding among the figure; 2a is a secondary coil of measuring level, in annular iron core is arranged; 2b is the secondary coil of protected level, in annular iron core is arranged, it is the same with protected level iron core inner and outer diameter to measure the level iron core, but highly different, two coils side by side; Primary winding 1 passes two secondary coil centers; Primary winding and secondary coil respectively are surrounded by insulation crimped paper and semiconductor adhesive tape outward; 3a measures level secondary coil lead-out wire connecting line stake 1S1,1S2 end to end; 3b is protected level secondary coil lead-out wire connecting line stake 2S1,2S2 end to end.

Accompanying drawing 2,1 is primary winding among the figure, it passes the center of two secondary coils; Primary winding is end-to-end once, and wiring square 4 is P1, P2; 2a measures the level secondary coil, and coil is lead-out wire 3a end to end.

Accompanying drawing 3,4 is the line squares that are end-to-end of primary winding 1 among the figure, is integral with pour mass; The 5th, cylindrical pour mass is the device heart in the pour mass; The 6th, the shirt rim band of pour mass; The 7th, the lower cylindrical body of cylinder 5 does not have opotism on every side, and secondary connection stake and earth connection stake is arranged; The 8th, the protective cover of secondary connection stake and earth connection stake, it and 7 loose joints of lower cylindrical body; The 9th, the nameplate window.

Accompanying drawing 4,4 is be end-to-end line square P1, the P2 of primary winding 1 among the figure, the screw on the square is the fixed bolt hole that is connected with outside line.

According to the utility model technology, make current transformer: rated operational voltage 27.5kV; Rated transformation ratio 1000A:5A; Class of accuracy is 0.5/10P/10; Capacity is 40VA; According to this requirement, it is 110mm that level annular iron core internal diameter is measured in design, and external diameter is 185mm, and height is 15mm; Protected level annular iron core internal diameter is 110mm, and external diameter is 185mm, and height is 40mm; Measuring on the level iron core, bifilar with the high-temperature resistant enamelled wire of φ 1.30mm around 199.5 circles, for measuring the level secondary coil; On the protected level iron core, bifilar with the high-temperature resistant enamelled wire of φ 1.35mm around 200 circles, be the protected level secondary coil; Two secondary coils respectively wrap half lap layer crimped paper and semiconductor adhesive tape outward; Two secondary coils outconnector stake end to end: 1S1,1S2; 2S1,2S2; Primary winding is to make a circle by circle copper rod and copper sheet lamination, passes two secondary coil centers, primary winding be end-to-end primary connection square P1, P2, and primary winding also wraps crimped paper and semiconductor adhesive tape outward, the heart of promptly growing up to be a useful person; The device heart is inserted location in the mould, fixing, vacuumize in vacuum chamber then, and high insulating electrical epoxy resin composite material heating is poured in the mould, the folding mould gets final product after solidifying; It is as follows through test data that this embodiment makes product:

Insulation resistance between each winding is greater than 2000M Ω; Tolerate power-frequency voltage 3kV/1min between the secondary winding and over the ground and do not have puncture; Partial discharge is 9Pc at measuring voltage 35kV apparent discharge capacity; In rated frequency, measure each secondary winding error in rated power factor and the rated load scope and all meet standard GB 1208-2006 requirement.

Claims

1, a kind of high-tension current inductor is by annular core and secondary coil, primary winding on the iron core and is wrapped in the dielectric isolation layer synthesizer heart on the coil, the device heart is inserted in the mould pouring epoxy resin and is made, it is characterized in that, two annular iron cores are arranged, its internal diameter is consistent with external diameter, and highly different; Respectively coiling is measured level and protected level secondary coil (2a) (2b) on iron core, at secondary coil (2a) (2b) outsourcing half lap layer crimped paper and semiconductor adhesive tape; Primary winding (1) passes (2b) center of two secondary coils (2a); Outer half lap layer crimped paper and the semiconductor adhesive tape, a secondary coil synthesizer heart of also wrapping of described primary winding (1); The described device heart is inserted positioning and fixing in the mould, vacuum pouring electrician epoxy resin.

2, a kind of high-tension current inductor is characterized in that, it is vertical side by side to measure level secondary coil (2a) and protected level secondary coil (2b), and two coils are (3a) and (3b) be connected to secondary connection stake 1S1,1S2,2S1,2S2 end to end.

3, a kind of high-tension current inductor is characterized in that, primary winding (1) passes two secondary coils (2a) and center (2b), and it is primary line wiring pile P1 and P2 that described primary winding (1) is end-to-end to top wiring square (4).

4, a kind of high-tension current inductor is characterized in that, electrician's epoxy resin poured body is cylinder (5), shirt rim band (6) is arranged around it, the bottom of cylinder (5) also is cylinder (7), and does not have the shirt rim, and a protective cover (8) and cylinder (7) loose joint are arranged on the lower cylindrical body (7).