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Current transformer

A technology of current transformers and transformers, applied in the direction of only measuring current, measuring current/voltage, instruments, etc., to achieve the effect of convenient detection and live test.

Active Publication Date: 2016-09-14
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a current transformer that can easily conduct live tests on the capacitance and other parameters of the current transformer in order to solve the problem that it is difficult to conduct live tests on the capacitance and other parameters of the current transformer.

Method used

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Embodiment Construction

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes ...

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Abstract

The invention relates to a current transformer comprising a transformer body; an oil tank which is arranged at one end of the transformer body; a box body which is connected with one end, which is away from the transformer body, of the oil tank; and a sensor which is arranged in the box body and used for detecting local discharge, capacitance and dielectric loss of the current transformer. According to the current transformer, the box body provided with the sensor and the transformer body are integrally arranged, and the sensor acts as a part of the whole current transformer and provides the hardware conditions for live testing of the local discharge, the capacitance and the dielectric loss of the transformer so that the effect of conveniently detecting the local discharge, the capacitance and the dielectric loss in the live process can be realized, and live testing of the transformer is enabled to be convenient, safe and accurate with no requirement for power disconnection and external connection of a sensing instrument.

Description

technical field [0001] The invention relates to the field of high-voltage electrical appliances, in particular to a current transformer. Background technique [0002] The current transformer is a sensor that enables secondary equipment such as measuring instruments and relay protection in the power system to obtain primary circuit current information, and enables important electrical equipment in the power system to undertake the isolation between high and low voltage systems and the high voltage to low voltage. Converted functions. Whether the current transformer itself works normally or not is of great significance to the safety of the power system and the normal operation of protection, measurement and other equipment. [0003] At present, it is usually detected by installing an external sensing device outside the transformer to detect when the power is off. However, this method has disadvantages such as inconvenient installation, difficult matching of structure, and uns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R35/02
CPCG01R19/0092G01R35/02
Inventor 陈俊王勇顾乐黄慧红蒋汉儒杜钢张显聪杨柳范旭娟杨珏彭跃辉文芳宋琼邹淑明曾艳玲
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD