Induction withstand voltage testing method for voltage transformer via relay protection tester

A voltage transformer and relay protection technology, which is applied in the field of voltage transformer induction withstand voltage test using a relay protection tester, can solve the problems of damaged test products, difficult handling, heavy equipment, etc., to improve test quality and improve Output waveform and ensure safety effect

Inactive Publication Date: 2019-06-28
SHANGHAI ERSHIYE CONSTR CO LTD +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complete set of triple frequency generator is not specially designed for the induction withstand voltage of voltage transformers. The number of pieces is large, the equipment is heavy, and it is not easy to carry. The output waveform and capacity will change with the load, and it is easy to resonate with the test product to cause resonance. Damage to the sample due to overvoltage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Induction withstand voltage testing method for voltage transformer via relay protection tester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention is further illustrated below by specific examples.

[0030] A method for conducting an induction withstand voltage test on an electromagnetic voltage transformer by using a relay protection tester, comprising:

[0031] Step 1, test preparation;

[0032] Step 1.1. Prepare the factory report of the tested voltage transformer with a rated voltage of 10kV and the technical materials of previous tests, and confirm that when the transformer leaves the factory to induce withstand voltage, input about 280V voltage from the a and n terminals of the secondary winding, the frequency is 150Hz, and the primary induction high voltage 28kV, and prepare test equipment such as relay protection tester, high-voltage divider, test ammeter, compensation inductor, and high-voltage discharge rod;

[0033] Step 1.2, check the insulation performance of the voltage transformer, and confirm that the induction withstand voltage test can be carried out;

[0034] Step 1.3. Ar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an induction withstand voltage testing method for a voltage transformer via a relay protection tester, and belongs to the field of power system test. The method is characterized by comprising the following steps of 1) test preparation; 2) wiring inspection; 3) withstand voltage induction; and 4) inspection of the insulation performance of the voltage transformer, and recovering wiring of the tested voltage transformer after it is determined that insulation of the tested voltage transformer is well. Compared with the prior art, the used relay protection tester, which iscommon and necessary for debugging of a power supply and distribution system and is light and simple, is used to replace a triple frequency generator in large size and many components or a special frequency modulation power supply and a heavy excitation transformer, so that the labor and equipment cost is reduced, and the outpour waveform and test quality are improved. The relay protection testercan set the highest output voltage, so that the safety of the tested voltage transformer can be ensued in the test process.

Description

technical field [0001] The invention relates to the field of testing of electric power systems, in particular to a method for using a relay protection tester to conduct a voltage transformer induction withstand voltage test. Background technique [0002] Potential transformers are essential equipment in power transformation and distribution systems, and their AC withstand voltage test is one of the inspection items for handover and preventive tests. When the voltage of the electromagnetic voltage transformer increases to 1.2 times the rated voltage at the rated frequency, the magnetic flux of the transformer core reaches saturation, and the exciting current increases sharply, making it difficult to reach the required test voltage, and the power frequency withstand voltage test can only The main insulation of the winding is inspected, but the inter-turn and interlayer longitudinal insulation of the winding cannot be inspected. At the same time, it is impossible to apply a hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/14G01R35/02
Inventor 李贵平郑守华朱臻原王有玲张革磊
Owner SHANGHAI ERSHIYE CONSTR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap