Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low voltage residual leak current measurement instrument and working method thereof

A leakage current and measuring instrument technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of unable to measure the phase relationship of three-phase lines, and unable to detect the amplitude and phase of leakage current in the circuit.

Inactive Publication Date: 2018-03-27
LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER +2
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing leakage current measurement method is to use a clamp meter to snap in all the lines, only to measure the leakage current value of the test line and its electrical equipment, and cannot measure the actual current amplitude in the three-phase line and the difference between them. The phase relationship is measured, and the magnitude and phase of the leakage current in the circuit cannot be detected

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
  • Low voltage residual leak current measurement instrument and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Embodiment: a kind of low-voltage residual leakage current measuring instrument of this embodiment, such as figure 1 As shown, it includes a microprocessor 1, a power supply module, a current sampling device, an amplifying circuit 2, a display screen 3 and a wireless communication module 4, and the current sampling device includes four current transformers 5, and the four current transformers 5 are respectively used for collecting L1 line current, L2 line current, L3 line current, N line current in the three-phase line, the amplifying circuit 2 is electrically connected with the current transformer 5 and the microprocessor 1 respectively, and the microprocessor 1 is respectively connected with the power module and the display screen 3 It is electrically connected with the wireless communication module 4.

[0024] The power module includes a rechargeable battery 6, a charging control circuit 7, a USB interface 8, a DC-DC converter 9 and a switch 10, the USB interface 8 i...

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 discloses a low voltage residual leak current measurement instrument and working method thereof. The measurement instrument includes a micro-processor, a power module, a current samplingdevice, an amplification circuit, a display screen and a wireless communication module. The current sampling device includes four current transformers used for collecting L1 line current, L2 line curre,t L3 line current and N line current in a three-phase circuit respectively. The amplification circuit is connected electrically to the current transformers and the microprocessor separately. The microprocessor is electrically connected with the power module, the display screen and the wireless communication module separately. According to the invention, actual current amplitudes of different lines in the three-phase circuit and the phase relation among the actual current amplitudes can be detected; also, leak current amplitude and phase can be determined.

Description

technical field [0001] The invention relates to the technical field of current detection, in particular to a low-voltage residual leakage current measuring instrument and a working method thereof. Background technique [0002] At present, the existing leakage current measurement method is to use a clamp meter to snap in all the lines, only to measure the leakage current value of the test line and its electrical equipment, and cannot measure the actual current amplitude in the three-phase line and the difference between them. The phase relationship is measured, and the magnitude and phase of the leakage current in the circuit cannot be detected. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a low-voltage residual leakage current measuring instrument and its working method, which can detect the actual current amplitude of each line in a three-phase line and the phase relationship between them, and can also d...

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): G01R31/02G01R19/25
CPCG01R19/25G01R31/50
Inventor 刘洪涛杨劭炜钟鸣王江海李沐红吴剑金潇雷娜钦冰李京润
Owner LISHUI POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com