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

Methods and devices for detecting disconnection of protective conductor connection

A technology for protecting conductors and electrical protection devices, applied in the fields of electrical protection devices, methods and electrical protection devices, disconnection of protective conductor connections, capable of solving problems such as ignorance

Active Publication Date: 2020-10-13
BENDER SA
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not known how reliably such means of protection will work in widely branched industrial networks with varying complex operating states

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
  • Methods and devices for detecting disconnection of protective conductor connection
  • Methods and devices for detecting disconnection of protective conductor connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] figure 1The protective earth in an unearthed (IT) three-phase (alternating current) power supply system 2 comprising active conductors L1 , L2 and L3 is shown. The power supply system 2 comprises a subsystem 4 which can be switched off and which comprises a piece of equipment 6 connected to an earthing system via a protective conductor connection 8 to the subsystem 4 . All active components of the unearthed power supply system 2 are separated from ground 10 by definition. The power supply system 2 is also characterized by the network leakage capacitance Cn1 of the main system and the network leakage capacitance Cn2 of the subsystem 4, since they are connected in parallel, the sum of the network leakage capacitances Cn1 and Cn2 is the total network leakage capacitance of the ungrounded power supply system 2. In the fault-free state and when the subsystem 4 is switched on, the leakage currents Ia1 and Ia2 flow via the network leakage capacitances Cn1 and Cn2 respectively...

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 a method for detecting disconnection of protective conductor connection of a non-grounding and grounding power supply system and a subsystem in a grounding power supply systemincluding a converter system and an electrical protection device. The invention is based on the idea that the disconnection of the protective conductor connection with a subsystem will reduce the sumof the network leakage capacitances of the power supply system by the value of the network leakage capacitance of the subsystem. The necessary distinction between a subsystem in operation having a disconnected protective conductor connection and a shut-off subsystem is made by evaluating the current total power consumed via the power supply system. In the case of a converter system connected to the subsystem, the protective conductor disconnection is detected by examining the leakage current spectra that are characteristic of the converter system.

Description

[0001] This application is a divisional application of the Chinese invention patent application 201710075180.3 with the filing date of February 10, 2017, and the title is "Method and device for detecting disconnection of protective conductor connection". technical field [0002] The invention relates to a method and an electrical protection device for detecting a disconnection of a protective conductor connection to a sub-system of an unearthed power supply system. [0003] Still further, the invention relates to a method and an electrical protection device for detecting a disconnection of a protective conductor connection to a sub-system of an earthed AC power supply system. [0004] Still further, the invention relates to a method and an electrical protection device for detecting a disconnection of a protective conductor connection to a sub-system of an earthed power supply system to which a converter system is connected. Background technique [0005] In power supply syste...

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): G01R31/66G01R31/52
CPCG01R31/66G01R31/52G01R31/086H02H3/16H02H3/33H02H5/105G01R31/54G01R31/67G01R31/327
Inventor 迪科尔·哈克尔哈拉尔德·塞尔纳
Owner BENDER SA
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