CN202940116U

CN202940116U - Concentric type voltage mutual inductor

Info

Publication number: CN202940116U
Application number: CN201220487742.8U
Authority: CN
Inventors: 赵淮林; 徐文新; 陈龙; 黄海涛; 苏宁; 马瑛; 冯锦军
Original assignee: SHENYANG SEALED TRANSFORMER CO Ltd
Current assignee: SHENYANG SEALED TRANSFORMER CO Ltd
Priority date: 2012-09-21
Filing date: 2012-09-21
Publication date: 2013-05-15
Anticipated expiration: 2022-09-21

Abstract

A concentric type voltage mutual inductor is designed for solving the problem that an existing outdoor type voltage mutual inductor is high in cost, complicated in line and the like. A voltage mutual inductor is increased in a transformer and shares an iron core with a high-low voltage line of the transformer. A measuring winding, namely the voltage mutual inductor is increased outside the iron core and wound on a high-low voltage coil of the transformer directly. The concentric type voltage mutual inductor has the advantage that the voltage mutual inductor is increased in the transformer, shares the iron core with the high-low voltage line of the transformer, is compact in structure, small in volume, simple to operate and convenient to wind, reduces cost of the transformer furthest, and solves the problem that the outdoor type voltage mutual inductor is high in cost, complicated in line and the like.

Description

The concentric type voltage transformer

Technical field:

The present invention relates to a kind of concentric type voltage transformer, relate in particular to the inner concentric type voltage transformer that uses of a kind of intelligent transformer.

Background technology:

Need to increase voltage transformer for a lot of electric power systems in route protection; often this voltage transformer can be added in control cubicle or other position of circuit; basically be all to increase in the outside of transformer, can cause like this cost of the complicated of line construction and the circuit that increases electric power.In addition, present a lot of intelligent transformers, can be by secondary device collection signals such as voltage transformers, carry out signal monitoring, if and the secondary devices such as this voltage transformer directly are added in control cubicle or other circuit place, the cost of the circuit that can increase electric power, and the performance that can reduce intelligent transformer, so the voltage transformer in circuit is badly in need of having a kind of new structure to occur, to solve present problem.

Summary of the invention:

The increase cost that the present invention exists in order to solve existing outdoor type voltage transformer, problems such as complex circuit, and invented a kind of employing at the inner voltage transformer that increases of transformer, and with iron core of transformer high-low-voltage line sharing.Namely increase by one to measure winding be voltage transformer iron core is outside, then the high-voltage coil and low-voltage coil that directly is wound around transformer is made.

Beneficial effect of the present invention: adopt at the inner voltage transformer that increases of transformer, and with iron core of transformer high-low-voltage line sharing, compact conformation, volume are little, simple to operate, coiling convenience, reduced to greatest extent the cost of transformer, solve the outdoor type voltage transformer and increased cost, the problems such as complex circuit.

Description of drawings:

Fig. 1 has outdoor type voltage transformer principle schematic now.

Fig. 2 concentric type voltage transformer of the present invention principle schematic.

Embodiment:

To Fig. 1, the terminal explanation in Fig. 2: A, X are the high voltage side of transformer end of incoming cables; A, x are the step down side leading-out terminal; A1, X1 are the voltage transformer leading-out terminal.

Referring to Fig. 2, the concentric type voltage transformer, with the shared iron core of the high-voltage coil and low-voltage coil of transformer, voltage transformer is inner at transformer, directly be wound around on iron core and measure winding (being the coil of voltage transformer), directly be wound around the high-voltage coil and low-voltage coil of transformer, with high voltage side of transformer end of incoming cables A, X shares again, the low-voltage side outlet end of transformer is a, x, voltage transformer leading-out terminal are A1, X1; A1, X1 and a, x is relatively independent, a, the exportable low voltage voltage of x, and A1, X1 directly is connected on voltmeter V and wattmeter W and other metrical instruments, can realize the function of voltage transformer.

Referring to Fig. 1, the schematic diagram of original outdoor type voltage transformer (be used for the present invention with prior art contrast), transformer high-low-voltage lateral coil and voltage measuring transformer winding are wrapped in respectively on separately two iron cores, namely adopt two iron cores.The end of incoming cables of voltage transformer in air (or in oil) is connected in parallel on high voltage side of transformer end of incoming cables A, and in the inlet wire circuit of X, A1, X1 are the voltage transformer leading-out terminal, connects voltmeter V and wattmeter W and other metrical instruments.

Claims

1. concentric type voltage transformer, voltage transformer is placed in transformer inside, it is characterized in that: iron core of voltage measuring transformer winding and transformer high-low-voltage line sharing, namely increase by one to measure winding be voltage transformer iron core is outside, then the high-voltage coil and low-voltage coil that directly is wound around transformer is made.