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On-site calibrating method and device of capacitor voltage transformer

A voltage transformer and on-site calibration technology, which is applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the problems of bulky, low efficiency, and bulky, etc., to reduce the test voltage signal, reduce labor intensity, and save test time Effect

Active Publication Date: 2011-10-26
RED PHASE INC
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Problems solved by technology

[0003] The purpose of the present invention is to solve the current situation that the existing capacitive voltage transformer on-site calibration equipment is bulky, bulky and inefficient, and propose a field calibration method for capacitive voltage transformers that can significantly reduce the weight and volume of the calibration equipment

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  • On-site calibrating method and device of capacitor voltage transformer
  • On-site calibrating method and device of capacitor voltage transformer
  • On-site calibrating method and device of capacitor voltage transformer

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Embodiment Construction

[0018] Such as figure 1 As shown, where C1 and C2 are capacitive voltage divider units, T is an electromagnetic unit, and L K is the compensation reactor, a and n are metering windings, da and dn are protection windings, Z X is the damping unit, P1 is the high-voltage terminal of the capacitor unit of the measured capacitor voltage transformer, N is the carrier terminal of the measured capacitor voltage transformer, and E is the low-voltage terminal of the electromagnetic unit.

[0019] A field verification method for a capacitive voltage transformer of the present invention mainly includes the following steps:

[0020] Step 1. The first signal processor 1 of the verification device applies two AC test signals V not exceeding 3kV between the high-voltage terminal P1 of the capacitor unit and the low-voltage terminal E of the electromagnetic unit of the capacitive voltage transformer under test. 1 1.V 1 2. The secondary side is open;

[0021] Step 2, the second signal proce...

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Abstract

The invention relates to an on-site calibrating method and an on-site calibrating device of a capacitor voltage transformer. The invention directly measures voltage and current signals at the primary side and the secondary side of the measured capacitor voltage transformer and calculates the ratio and angular differences of the measured capacitor voltage transformer by utilizing the measured result, so that the invention can realize separately measuring the error of the measured capacitor voltage transformer only by the on-site calibrating device of the capacitor voltage transformer and does not need equipment such as a standard transformer, a voltage regulator, a voltage booster, a reactor and the like, thus saving calibrating time, lowering labor intensity of workers and resolving the difficulty of difficult implementation for error test of the on-site capacitor voltage transformer.

Description

technical field [0001] The invention relates to an on-site verification method for a capacitive voltage transformer, which is mainly used for on-site error testing of the capacitive voltage transformer for measurement. Background technique [0002] Conventional capacitive voltage transformer field calibration is mainly carried out by comparison method, and the calibration equipment is mainly composed of standard voltage transformer, boost source (device), and load box. During on-site calibration, use the boost source (device) to provide test voltage to the standard transformer and the primary winding of the capacitive voltage transformer under test at the same time, and then use the output of the secondary winding of the standard voltage transformer as the true value to calculate or measure the The output error of the secondary winding of the capacitive voltage transformer under test. The calibration equipment of this on-site calibration method is bulky and heavy, and the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 杨成理查德·道林陈耀高林玉涵
Owner RED PHASE INC
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