Anti-interference direct current resistance testing device

A technology of DC resistance testing and standard resistance, which is applied in the direction of measuring devices, measuring resistance/reactance/impedance, components of electrical measuring instruments, etc., and can solve the problems of inability to complete line DC resistance testing, personal induction accidents, test data deviations, etc. problems, to achieve the effect of safe and convenient test wiring, strong field applicability, and strong practicability

Active Publication Date: 2013-03-20
FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the present invention proposes an anti-interference DC resistance testing device, which uses harmonic analysis method to realize the measurement of DC resistanc

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
  • Anti-interference direct current resistance testing device
  • Anti-interference direct current resistance testing device
  • Anti-interference direct current resistance testing device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example

[0023] like figure 1 As shown, the DC constant voltage and constant current source is connected with the impedance matching unit; the impedance matching unit and the data test calculation unit are respectively connected with the standard resistance and the measured resistance sampling unit, the relay test action unit and the interference voltage detection unit; the data test calculation unit is connected with The display unit; the display unit is connected to the keyboard and the overvoltage protection unit; the keyboard and the overvoltage protection unit are connected to the storage and printing units.

[0024] like figure 2 As shown, the DC constant voltage and constant current source is, the EMI filter circuit is connected to the rectifier filter circuit I, the rectifier filter circuit I is connected to the isolation transformer and the PWM control circuit, the isolation transformer is connected to the rectifier filter circuit II, and the rectifier filte...

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 anti-interference direct current resistance testing device, which adopts the structure that a direct current, constant voltage and constant current source is connected with an impedance matching unit; the impedance matching unit and a data testing and calculating unit are respectively connected with a standard resistance and measured resistance sampling unit, a relay test action unit and an interference voltage detecting unit; the data test calculating unit is connected with a display unit; the display unit is connected with a keyboard and an over-voltage protection unit; and the keyboard and the over-voltage protection unit are connected with a storage and printing unit. The device can meet the requirements of achieving smooth and accurate test of direct current resistance under the condition of a 350V relative interference voltage or a 100V interphase interference voltage.

Description

technical field [0001] The invention relates to a test device for electric power equipment, in particular to an anti-interference DC resistance test device, which is applied to test the DC resistance of electric power equipment. Background technique [0002] At present, with the development of electric power construction, the number of 66kV and above lines being erected on the same pole and crossing across them is increasing, resulting in a high induction voltage between transmission lines. The single phase-to-ground voltage can reach about 350V, and the phase-to-phase voltage can reach about 100V. [0003] The DC resistance measurement of the line is the basic data for checking the quality of the line crimping joints and the fault location of the line distance, and is also the main basis for evaluating the construction quality of the line. Bridges and digital DC resistance testers cannot complete the test of line DC resistance at all, and there are often serious deviations ...

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
IPC IPC(8): G01R27/08G01R1/28
Inventor 刘国斌王清昊顾孟山李萍王翼李岩张宁李刚
Owner FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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