Insulation fault location systems and methods for insulation fault location for a redundant DC power supply system coupled to diodes

A technology for power supply systems and insulation faults, applied to fault locations, detecting faults according to conductor types, measuring electrical directions, etc., can solve problems such as insulation coordination problems

Active Publication Date: 2018-10-23
BENDER SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] It may be useful to separate the connection between the negative terminals of the two redundant DC voltage supplies, however, this is unacceptable in most installations as certain failure conditions to be observed would result in redundant DC voltage

Method used

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  • Insulation fault location systems and methods for insulation fault location for a redundant DC power supply system coupled to diodes
  • Insulation fault location systems and methods for insulation fault location for a redundant DC power supply system coupled to diodes
  • Insulation fault location systems and methods for insulation fault location for a redundant DC power supply system coupled to diodes

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Embodiment Construction

[0064] exist figure 1 In , an ungrounded DC power supply system 2 is illustrated redundantly fed from a first direct voltage supply source 4a connected to a diode and a second direct voltage supply source 4b connected to a diode. The electrical consumers 6 are connected to the DC power supply system 2 via two spatially separated redundant power supply lines 8 a , 8 b each consisting of two active conductors 10 .

[0065] After an insulation fault has been signaled by an insulation monitoring device (not shown), a test current is alternately supplied by a test current to the active conductor 10 of the DC power supply system 2 on one side and to the ground on the other side at a central position The generator 12 starts insulation fault location.

[0066] A first measurement current transformer 14a for capturing the first test current portion flowing in the first supply line 8a and a second measurement current transformer for capturing the second test current portion flowing in ...

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Abstract

The invention relates to insulation fault location systems and methods for insulation fault location for an ungrounded DC power supply system, which is redundantly fed from a first direct voltage supply source coupled to diodes and a second direct voltage supply source coupled to diodes and to which a consumer is redundantly coupled. Due to the diode coupling and the asymmetric current splitting of the load current associated therewith, non-compensational partial currents arise in the supply lines in such a power supply system and consequently differential current portions, which can be captured by measuring current transformers and which can interfere with a valid test current during an insulation fault location. In order to eliminate the interfering differential current portions, compensating measures on the primary side are proposed in the measuring current transformers and indirect compensating measures on the secondary side are proposed in an insulation fault location apparatus.

Description

technical field [0001] The present invention relates to an insulation fault location system and method for insulation fault location based on a corresponding preamble for an ungrounded DC power supply system, which is disclosed in the invention as an ungrounded DC power supply system being connected from a The first DC voltage supply of the diode and the second DC voltage supply connected to the diode are redundantly fed, and the consumer is fed via a first supply line consisting of two active conductors and consisting of two active conductors The second power supply line is redundantly connected to the ungrounded DC power supply system. Background technique [0002] To supply electrically operated devices, when the requirements for operational, fire and contact safety increase, grounding systems of unearthed supply systems are used, also known as isolated networks (French: Isolé Terre – IT) or IT supply system. In this type of power supply system, the active components ar...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/08
CPCG01R31/086G01R31/12G01R31/08G01R31/40G01R31/52H02J1/06G01R31/1272
Inventor 迪科尔·哈克尔卡斯滕·哈特曼
Owner BENDER SA
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