CN2754195Y

CN2754195Y - Outdoor high-voltage combined mutual inductor

Info

Publication number: CN2754195Y
Application number: CN 200420053872
Authority: CN
Inventors: 王伟坤; 王晓琪; 张逢春
Original assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Current assignee: TAIKAI MUTUAL INDUCTOR CO Ltd SHANDONG
Priority date: 2004-09-23
Filing date: 2004-09-23
Publication date: 2006-01-25
Anticipated expiration: 2014-09-23

Abstract

The utility model relates to an outdoor high-voltage combined mutual inductor, which belongs to a three-phase alternating current 50-HZ outdoor high-voltage SF6 gas insulating combined mutual inductor. The utility model is suitable for metering the active and reactive power of a 10 (35) KV alternate current neutral point insulating three-phase power system. The combined mutual inductor of the utility model is mainly composed of a box body, a ceramic bushing, a current mutual inductor, voltage mutual inductors, a primary conductive rod, a pressure gauge, a secondary circuit board, a supporting frame, etc., wherein the box body is in the shape of a drum, two voltage mutual inductors are connected by a main connecting conductive strip, and the insulating frames of the voltage mutual inductors and an insulating support of the current mutual inductor are all poured by epoxy resin; a secondary coil of the current mutual inductor is arranged in a circular aluminium secondary shielding box, a primary coil of the current mutual inductor is wound on a high-voltage shield, the two voltage mutual inductors are connected with the conductive rod by elastic elements, the primary access wires of the current mutual inductor are arranged on the ceramic bushing in a staggered way from top to bottom and from left to right. The utility model having the advantages of simple and compact structure, beautiful appearance, no maintenance, etc. Solves the disadvantages that traditional oil immersion type and dry type products are difficult to meet the requirements of national standard partial discharge, and the utility model having major technique parameter reaching and exceeding national standard requirements is an ideal product for substituting traditional combined mutual inductors.

Description

The outdoor high-voltage combination transformer

(1) field under

The utility model belongs to outdoor high-voltage SF6 insulation combination transformer.

(2) background technology

Develop rapidly along with power grid construction, State Power Corporation proposes to strengthen the electric-power metering management, realize the requirement of the reliable metering of high accuracy, and the traditional oil immersed type and the combination transformer of poured with epoxy resin exist, and unreliable products performance, useful life are short, anti-electricity-theft ability and shortcoming such as easy care not, the requirement of State Power Corporation and now the contradiction between the technical performance of traditional product perplexing effectively carrying out of gage work.

(3) summary of the invention

The utility model outdoor high-voltage SF6 insulation combination transformer is mainly combined by two current transformers and two voltage transformers, and be furnished with functional unit such as Pressure gauge, be mainly used in 10kV and exchange with 35kV in the three-phase electrical power system of neutral point insulation and do meritorious, reactive energy metering.The purpose of the utility model product provides a kind of novel outdoor high-voltage SF6 gas-insulated combination transformer, to improve accuracy, reliability and the fail safe of high pressure measurement, change shortcomings such as the inaccurate and easy stealing of poor reliability, the metering of the combination transformer of high pressure measurement in the past, thereby improve the electric-power metering managerial skills, improve the whole synthesis benefit of electric-power metering.

Technical characterstic of the present utility model: the utility model is the outdoor high-voltage combination transformer, mainly form by casing, insulator, current transformer, voltage transformer, primary conductive bar, Pressure gauge, secondary connection plate and support etc., its voltage transformer summation current transformer is fixed on the support, support and device body partial fixing are on casing, and casing is a drum shape; Two voltage transformers join busbar by mother and connect; The insulation of voltage transformer insulation framework summation current transformer is supported and is all adopted poured with epoxy resin; The secondary coil of current transformer is contained in the secondary shield box, and shielding box is circular aluminium; The primary winding of current transformer is on high-tension shielding; Two voltage transformers and conducting rod are connected and fixed by flexible member; About the once turnover line of current transformer, left and right sides arranged in dislocation is on sleeve pipe.

Advantage of the present utility model: adopt the SF6 gas-insulated, insulation is reliable, and insulation has the self-reparability of puncture; The whole office of product puts very little, and the requirement that is up to state standards fully makes insulation very reliable, and long service life can reach 30 years.The measuring accuracy height can reach 0.1 grade.Product is all-sealed structure, and is non-maintaining, and it is strong to bear the dynamic and thermal stability ability; The ability that main insulation is born power frequency and lightning impulse voltage is strong, and insulation is reliable.It is the desirable renewal product of traditional oil immersed type and poured with epoxy resin formula combination transformer.

(4) description of drawings

The front view of Fig. 1, outdoor high-voltage SF6 insulation combination transformer

1 is A phase and C P1 terminated line plate mutually among Fig. 1; The 2nd, A phase and C P2 terminated line plate mutually; The 3rd, the secondary connection box; The 4th, Pressure gauge; The 5th, nameplate; The 6th, charge valve; The 7th, casing; The 8th, insulator; The 9th, P2 holds conducting rod; The 10th, P1 holds conducting rod; The 11st, B phase conducting rod.

The end view of Fig. 2, outdoor high-voltage SF6 combination transformer

12 is flanges among Fig. 2

The device body part of Fig. 3, outdoor high-voltage SF6 combination transformer

13 is A phase current mutual inductors among Fig. 3; The 14th, A equal potentials connecting line; The 15th, AB phase voltage instrument transformer; The 16th, female connection busbar; The 17th, BC phase voltage instrument transformer; The 18th, C equal potentials connecting line; The 19th, C phase current mutual inductor 20 is supports.

The current transformer assembling of Fig. 4, outdoor high-voltage SF6 insulation combination transformer

21 is leads of current transformer among Fig. 4; The 22nd, high-tension shielding; The 23rd, insulation support plate; The 24th, the secondary shield box; The 25th, support; 26 Current Transformer Secondary lead-in wire

The voltage transformer part of Fig. 5, outdoor high-voltage SF6 insulation combination transformer

27 is voltage transformer high-voltage connections among Fig. 5; The 28th, the high pressure winding; The 29th, insulation framework; The 30th, secondary winding; The 31st, the voltage transformer secondary lead-in wire; The 32nd, unshakable in one's determination.

(5) most preferred embodiment of the present utility model

AB phase voltage instrument transformer (15) and BC phase voltage instrument transformer (17) are fixed on the support (20), and the insulation framework of voltage transformer (29) is used poured with epoxy resin, and voltage transformer and conducting rod are connected and fixed by flexible member.Middle by female connection busbar connection (16), A phase current mutual inductor (13) and C phase current mutual inductor (19) are fixed on the support (20), the insulation support plate of current transformer (23) is used poured with epoxy resin, the Current Transformer Secondary coil is contained in the secondary shield box (24), Current Transformer Secondary lead-in wire (26) is drawn in the secondary shield box, a lead of current transformer (21) is outside high-tension shielding (22), by A equal potentials connecting line (14) the A phase voltage is connected on the AB phase voltage instrument transformer (15), by C equal potentials connecting line (18) the C phase voltage is connected on the BC phase voltage instrument transformer (17), then device body shown in Figure 3 is fixed to casing (7) inside, current transformer (13,19) terminal block (1,2) distribution straggly is installed.And then assembling insulator (8) and conducting rod (9), (10), (11), Current Transformer Secondary lead-in wire (26) and voltage transformer secondary go between (31) receive secondary connection box interior (3), load onto Pressure gauge (4) and self-styled valve (6).Flange (12) is loaded onto at two ends, fills SF6 gas with by self-styled valve (6).

The utility model is through evidence, and every technical parameter all reaches the peak demand of GB17201 and other relevant criterion, and its most outstanding characteristics are to use reliable and stable, and the life-span is long, and is non-maintaining.The utility model overall performance height, the application prospect of product is very wide, has excellent comprehensive performances, will make positive contribution for the electric utility development of China.

Claims

1, a kind of outdoor high-voltage combination transformer, mainly form by casing, insulator, current transformer, voltage transformer, primary conductive bar, Pressure gauge, secondary connection plate and support etc., it is characterized in that the voltage transformer summation current transformer is fixed on the support, support and device body partial fixing are on casing, and casing is a drum shape.

2, a kind of outdoor high-voltage combination transformer according to claim 1 is characterized in that two voltage transformers join busbar by mother and connect.

3, a kind of outdoor high-voltage combination transformer according to claim 1 is characterized in that voltage transformer insulation framework summation current transformer insulation support plate all adopts poured with epoxy resin.

4, a kind of outdoor high-voltage combination transformer according to claim 1 is characterized in that the secondary coil of current transformer is contained in the secondary shield box, and shielding box is circular aluminium.

5, a kind of outdoor high-voltage combination transformer according to claim 1, the primary winding that it is characterized in that current transformer is on high-tension shielding.

6, a kind of outdoor high-voltage combination transformer according to claim 1 is characterized in that two voltage transformers and conducting rod are connected and fixed by flexible member.

7, a kind of outdoor high-voltage combination transformer according to claim 1, it is characterized in that current transformer about the line terminal block, the left and right sides is straggly is installed on the sleeve pipe.