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Calibration device and system for clamp current transformer

A technology for current transformers and calibration devices, which is applied to measuring devices, instruments, and measuring electrical variables, etc., to achieve the effects of improving accuracy, avoiding on-site errors, and reducing errors

Active Publication Date: 2017-10-27
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a calibrating device and system for a clamp-on current transformer, so as to solve the problem that the calibrator of the electric energy meter in the prior art is prone to large errors

Method used

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  • Calibration device and system for clamp current transformer
  • Calibration device and system for clamp current transformer
  • Calibration device and system for clamp current transformer

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0028] The embodiment of the present invention provides a verification device for a clamp current transformer. The verification device for a clamp current transformer provided in the embodiment of the present invention is specifically introduced as follows:

[0029] figure 1 is a structural diagram of a calibration device for a clamp current transformer according to an embodiment of the present invention, figure 2 yes figure 1 The enlarged picture of 21 places in the middle, such as figure 1 with figure 2 As shown, the verification device mainly includes a suspension frame 10, an electric energy meter standard part 20, a test rod 30 and an electric energy meter calibrator (not shown in th...

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Abstract

The invention discloses a calibration device and system for a clamp current transformer. Among them, the calibration device of the clamp current transformer includes: a suspension frame, which has a cross bar, a first support, a second support and a fixing part; a standard part of an electric energy meter, which is used to provide a stable test current; a test rod, which wears It is arranged on the first support, the second support and the fixing part, and both ends of the test rod are connected with the standard part of the electric energy meter to form a test circuit for transmitting the test current; and the electric energy meter calibrator is connected with the electric energy meter Both the meter standard part and the clamp current transformer are connected, and are used for calculating and measuring electric energy according to the test current detected by the clamp current transformer, and feeding back the measured electric energy to the electric energy meter standard part. The invention solves the problem that the electric energy meter calibrator is prone to large errors in the prior art, and further achieves the effect of reducing the error of the electric energy meter calibrator and improving the accuracy of on-site calibration.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a calibration device and system for a clamp current transformer. Background technique [0002] The field calibrator of the electric energy meter is a metering device used for on-site testing of the error of the electric energy meter at the actual operating place of the installed electric energy meter such as the substation and the residential user. In the field, the electric energy meter is in the power-on operation state. Due to various factors such as customer needs and test safety, it is often not possible to disconnect the electric energy meter line, and then connect the electric energy meter field calibrator to the line to check the error of the electric energy meter. Measurement. At this time, the method adopted is to use a clamp current transformer (also known as a current clamp meter) for current sampling, by placing the current wire into the jaw of the current clamp me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00G01R35/02G01R35/04
Inventor 靳阳赵成李之彧陈旭
Owner STATE GRID CORP OF CHINA
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