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Method and device for locating insulation faults in operating equipment connected to a power system

A technology for operating devices and power systems, applied to measuring devices, fault locations, measuring electricity, etc., can solve problems such as fault location troubles, and achieve cost-saving effects

Active Publication Date: 2021-04-16
BENDER SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With a sufficient number of measuring current transformers, selectivity down to a single socket can be achieved, however, this disadvantageously involves corresponding material and installation costs
[0008] Therefore, fault location is often very troublesome, especially in faults that occur in connected operating devices such as consumers or generators

Method used

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  • Method and device for locating insulation faults in operating equipment connected to a power system

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Embodiment Construction

[0050] A branch power system 2 consisting of a main system 4 and two subsystems 6 is shown. An electrical consumer or generator is connected to the subsystem 6 as an electrical operating device 8 .

[0051] A device 10 for locating insulation faults according to the invention is shown in a functional block diagram and comprises as a basic functional block an electrical monitoring device 12 connected via a communication channel 14 to an identification device 16 .

[0052] In this case, the electrical monitoring device 12 is configured as a residual current monitoring device with two measuring current transformers 13 . The measuring current transformer 13 captures residual currents flowing in the subsystem 6 which would occur if one of the operating devices 8 had an insulation fault. If the measured residual current exceeds a predetermined value, the residual current monitoring device 12 generates a fault report and transmits the fault report including the corresponding fault t...

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Abstract

The invention relates to a method and a device (10) for locating an insulation fault in an operating device (8) connected to a power supply system (2). The basic functional block of the invention is the electrical monitoring device (12), which identifies insulation faults and transmits the corresponding fault time to the identification device (16) via the communication channel (14), which identifies the device (16) A faulty operating device (8) is identified by the on / off signal progression characteristics of a particular operating device (8).

Description

[0001] The invention relates to a method and a device for locating an insulation fault in an operating device connected to a power system. Background technique [0002] The basis for the safe supply of electrical energy is a reliable power supply system. High availability of power supplies requires highly sophisticated electrical installations equipped with protection and monitoring equipment for timely identification of faults and enabling time- and cost-saving fault localization. [0003] In grounded power systems, insulation faults manifest themselves as residual currents, which do not trigger fault current protection devices, but in the long run constitute a potential hazard especially for persons who come into contact with live installation parts. In ungrounded power systems, reduced insulation resistance values ​​pose a risk to operational safety. Therefore, it is necessary to identify, locate and eliminate such insulation faults as soon as possible. [0004] In ground...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/50G01R31/52G01R31/08
CPCG01R31/08G01R31/52G01R31/50
Inventor 德克·皮尔勒乔阿希姆·瓦格纳
Owner BENDER SA
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