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Precautions for the Selection of Fault Indicator

Views:175     Author:Site Editor     Publish Time: 2021-06-08      Origin:Site


The fault indicator is an electromagnetic induction device that can reflect the passage of electrical short circuit current and a fault sign (red card) appears. Install this fault indicator along the overhead distribution line. Once the line fails and short-circuit current flows, the fault indicator will act and the fault sign red card will appear. Then patrol along the line to find the fault point.


fault indicator

 

 

Classification of fault indicators

There are two types of line fault indicators, cable fault indicators and overhead fault indicators. Cable fault indicators are mainly used in power cable lines, ring network cabinets, branch back boxes and other cable systems. The subdivision can also be divided into panel type fault indicators, cable fault indicators, LCD panel type fault indicators, etc. Overhead line fault indicators are subdivided into intelligent short circuit and earth fault indicators. Overhead line fault indicators are installed on overhead power lines to detect grounding, short circuit faults and other functions of the line.

 

 

The role of fault indicators

The fault indicator is mainly used to indicate the path of the fault current. After the line fails, the line patrol staff can use the indicator's alarm display to quickly find and determine the faulty section and find the fault point. The fault indicator can also detect the running status of the line and the location of the fault in real time, such as power transmission, power outage, grounding, short circuit, overcurrent, etc. When the line operation status changes, promptly notify the staff on duty and management staff, and make processing decisions quickly, which can greatly improve the reliability of power supply and increase the satisfaction of users. Once a power failure occurs, it will be difficult to find. Firstly, it causes inconvenience to people's lives and interferes with the normal production and operation of enterprises; secondly, it causes greater losses to power supply companies. In order to be able to be solved in time after the high-voltage line breaks down, the stability of power supply should be improved.


fault indicator

 

 

Precautions for the selection of fault indicator

1. Security

Since the fault passage indicator is installed in the 10KV high-voltage switch cabinet, there must be sufficient safety distance and insulation protection between the indicator and the high-voltage belt. The internal communication adopts optical fiber mode. The equipment must have a certain degree of flame-proof, explosion-proof, high-temperature prevention and ozone corrosion protection performance.

 

2. Reliability

One is that the indicator must be able to operate stably for a long time, and the equipment body and power supply must have a long life. The second is to be able to operate correctly, the equipment can resist electromagnetic interference, and can avoid the influence of non-fault factors such as operating overvoltage.

 

3. Economical and practical

As an accessory of 10KV switchgear, the line fault indicator has a large number of installations. In use, the smallest investment should be used to obtain the greatest benefit;

 

4. Easy to use and maintain

It is convenient to read the fault information, to change the battery, and to change the indicator.


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