CN201608041U

CN201608041U - Single-phase five-winding electromagnetic type voltage transformer

Info

Publication number: CN201608041U
Application number: CN200920075768XU
Authority: CN
Inventors: 李志勇; 赵晓明; 刘方怡; 黄云斌
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2009-08-04
Filing date: 2009-08-04
Publication date: 2010-10-13
Anticipated expiration: 2019-08-04

Abstract

The utility model provides a single-phase five-winding electromagnetic type voltage transformer, comprising an iron core, a winding framework is arranged at the middle part of the window of the iron core by an insulation supporting piece; the single-phase five-winding electromagnetic type voltage transformer is characterized in that: four groups of secondary windings are wound on the winding framework sequentially from inside to outside, secondary winding lead wires are led out from two sides of four groups of the secondary windings, a group of first windings are wound at the position of the secondary winding, first winding interlayer insulation is arranged among layers of the first winding, the inner side and the outer side of the first winding are respectively provided with a low-voltage electrostatic screen and a high-voltage electrostatic screen, a first winding high-voltage terminal lead wire is led out on the high-voltage electrostatic screen at the top part of the outer side of the first winding, and first winding low-voltage terminal lead wire is led out from one side of the high-voltage electrostatic screen; in the utility model, the single-phase five-winding electromagnetic type voltage transformer is provided, so as to meet requirements of load quantity at secondary sides of the voltage transformer; meanwhile, the first winding is wound on the basis of four groups of the secondary windings, and all windings are arranged into a concentric drum-type structure, so as to be beneficial to reducing leakage reactance and improving the metering accuracy.

Description

A kind of single-phase five winding electromagnetic potential transformers

Technical field

The utility model relates to a kind of single-phase five winding electromagnetic potential transformers.

Background technology

The common voltage instrument transformer generally has a secondary winding (this is two winding voltage instrument transformers), and three secondary winding (this is four winding voltage instrument transformers) are arranged at most.But owing to people constantly increase the requirement of voltage transformer secondary side institute on-load quantity, existing two winding voltage instrument transformers or four winding voltage instrument transformers can not meet the demands.

Summary of the invention

The purpose of this utility model provides a kind of five winding voltage instrument transformers.

In order to achieve the above object, the technical solution of the utility model has provided a kind of single-phase five winding electromagnetic potential transformers, comprise iron core, bobbin is located at the middle part of core window by insulated support, it is characterized in that, on bobbin, be wound with four groups of secondary winding from inside to outside successively, lead to the secondary winding lead-in wire in the both sides of four groups of secondary winding, be around with one group of winding in secondary winding, interlayer at a winding is provided with the winding layer insulation one time, the winding inboard and the outside are respectively equipped with low pressure electrostatic shielding and high-pressure electrostatic screen, on the top high-voltage electrostatic shielding in a winding outside, draw winding high-pressure side lead-in wire one time, draw winding low-pressure end lead-in wire one time in low pressure electrostatic shielding one side.

The utility model provides one group of five winding voltage instrument transformer, satisfied the requirement of people for voltage transformer secondary side institute on-load quantity, the utility model winding of coiling again on the basis of four groups of secondary winding simultaneously, each winding is lined up the concentric cylinder type structure, help reducing leakage reactance, improve the accuracy of measuring.

Description of drawings

The overall construction drawing of a kind of single-phase five winding electromagnetic potential transformers that Fig. 1 provides for the utility model;

Fig. 2 is the winding cross section view of Fig. 1;

Fig. 3 A is winding around to schematic diagram;

Fig. 3 B is the secondary winding that is positioned at the outermost ground floor around to schematic diagram;

Fig. 3 C is the secondary winding that is positioned at the second layer around to schematic diagram;

Fig. 3 D is positioned at the 3rd layer secondary winding around to schematic diagram;

Fig. 3 E is positioned at the 4th layer secondary winding around to schematic diagram;

Fig. 4 is an electrical schematic diagram.

Embodiment

Specify the utility model below in conjunction with embodiment.

Embodiment

As shown in Figures 1 and 2, the structural representation of a kind of single-phase five winding electromagnetic potential transformers that provide for the utility model comprises iron core 1, and bobbin 2 is located at the middle part of iron core 1 window by insulated support 10.On bobbin 2, be wound with four groups of secondary winding 4 from inside to outside successively, lead to secondary winding lead-in wire 3 in the both sides of four groups of secondary winding 4.These four groups of secondary winding around to respectively shown in Fig. 3 B to Fig. 3 E; wherein, four groups of secondary winding 4 are followed successively by residual voltage winding dadn, metering (or measure, protection) winding 3a3n, metering (or measure, protection) winding 2a2n, metering (or measure, protection) winding 1a1n from inside to outside.Secondary winding 4 be around with 6, windings 6 of one group of winding around to as shown in Figure 3A.Interlayer at a winding 6 is provided with winding layer insulation 9 one time, one time the winding inboard is provided with low pressure electrostatic shielding 5, the outside is provided with high-pressure electrostatic screen 8, on the top high-voltage electrostatic shielding 8 in winding 6 outsides, draw winding high-pressure side lead-in wire A one time, draw winding low-pressure end lead-in wire N one time in low pressure electrostatic shielding 5 one sides.The electrical schematic diagram of these single-phase five winding electromagnetic potential transformers as shown in Figure 4.

The manufacturing process of a kind of single-phase five winding electromagnetic potential transformers that the utility model provides is: adopt conventional method to carry out insulating Design; Carry out Error Calculation based on paper " computational methods of single-phase five winding voltage transformer errors " (" transformer " 2007 the 44th the 09th phases of volume), on the basis of this design, make first and second winding of instrument transformer, and carry out the semi-finished product error test, after qualified winding adorned mould and vacuumize, adopt the form of epoxide resin vacuum cast that winding is carried out castable at last, promptly main insulation mixture of epoxy resins layer I wraps winding II as shown in Figure 1.

Claims

1. single-phase five winding electromagnetic potential transformers, comprise iron core (1), bobbin (2) is located at the middle part of iron core (1) window by insulated support (10), it is characterized in that, on bobbin (2), be wound with four groups of secondary winding (4) from inside to outside successively, lead to secondary winding lead-in wire (3) in the both sides of four groups of secondary winding (4), be around with one group of winding (6) in secondary winding (4), interlayer at a winding (6) is provided with a winding layer insulation (9), the winding inboard and the outside are respectively equipped with low pressure electrostatic shielding (5) and high-pressure electrostatic screen (8), on the top high-voltage electrostatic shielding (8) in a winding (6) outside, draw a winding high-pressure side lead-in wire (A), draw a winding low-pressure end lead-in wire (N) in low pressure electrostatic shielding (5) one sides.