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Method and current distribution device for identifying and indicating a faulty communication connection

A communication connection and current technology, which is applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems affecting protection functions and uncertain states

Inactive Publication Date: 2017-11-17
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage here is that indeterminate states can arise through this overlap, which can lead to an impairment of the protective function

Method used

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  • Method and current distribution device for identifying and indicating a faulty communication connection
  • Method and current distribution device for identifying and indicating a faulty communication connection
  • Method and current distribution device for identifying and indicating a faulty communication connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 A current distribution device 1 is shown with three switches 2 , 3 , 4 which are manufactured as low-voltage power switches and are connected to a power supply 5 . Seen from the power supply 5, the switch 2 is set directly before the two switches 3, 4, and the two switches 3, 4 are set directly behind the switch 2.

[0026] The current flowing through the immediately downstream switches 3 , 4 also flows through the preceding switch 2 . Each switch 2 , 3 , 4 opens automatically in each case when generally speaking a predetermined current condition is fulfilled, here when a current threshold value is exceeded. The current threshold is exceeded, for example, in the event of a short circuit.

[0027] The switches 2 , 3 , 4 are arranged hierarchically (hierarchically), wherein switch 2 establishes a hierarchical level (level) and switches 3 , 4 arranged directly behind establish the hierarchical level (level) arranged below it. The switches (which do not exist he...

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PUM

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Abstract

The invention relates to a method for identifying and marking a faulty communication connection (6, 7) in a switchgear having a previously arranged switch (2) and At least two switches (3, 4) arranged directly downstream, wherein the communication between the switches (2, 3, 4) takes place via the communication link (6, 7) by means of digital signals (M, IL), and wherein the signal The temporally overlapping transmission of (M, IL) and the voltage overlapping of the signal (M, IL) are connected at the previously provided switches ( 2 , 3 , 4 ) for reception. In order to ensure the protective function at any time, it is recommended that a switch (3, 4) located behind it send a signal (M) respectively via the communication connection (6, 7) as a verification signal, and if the verification signal is at a predetermined If it disappears for a duration, the remaining switches (2) indicate the faulty communication connection (6, 7) respectively.

Description

technical field [0001] The invention relates to a method according to the preambles of claims 1 and 9 for identifying and flagging a faulty communication connection in a switchgear and a current distribution device for carrying out the method. Background technique [0002] It is known in current distribution devices to distribute the current to individual system branches (or consumers) by means of switches, in particular low-voltage power switches. These switches are each designed for a rated current and interrupt the current flowing through the switch in the event of a fault, such as occurs in the event of a short circuit. In this case, only the faulty or the closest to the faulty system branch should be disconnected in each case. This behavior is known as selective cutting. At least one detection device and one tripping unit are present in each upstream switch seen from the power supply. The detection devices each detect the current flowing through the switch by means o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/00H02H3/08
Inventor 陈维刚M·丹克特杜峰闵应宗卓越
Owner SIEMENS AG