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How to use the relay protection tester
Release time:2021-04-16
Read:62
        The relay protection tester is an instrument often used by electric workers. It has the characteristics of simple use and powerful functions. It is deeply loved by the majority of electric workers. However, many electric workers who use this instrument for the first time are not very clear about how to use this instrument. Equipment, today I will give you a brief introduction to some simple usage methods of the relay protection tester in this article. I hope it will be of some help to those who are using this instrument.

Relay Protection Tester

 
         After inputting the effective value of voltage and current, press "Enter" or click the mouse to another position. The default unit of voltage is V and the unit of current is A. When setting the phase, you can input -180-360° with one key Any angle within the range, if the written angle exceeds the above range, the system will automatically switch to this range, and the effect diagram of the size and direction of each set of communication volume vectors can be observed in real time in the vector diagram window .

         AC voltage single-phase output 120V, when you need to output a higher voltage, you can use any circuit in series, their amplitude values ​​can be different, but the phase is in the opposite direction. If you want to output more current, you can use multiple currents in parallel, and the phase of each phase should be the same when used in parallel. When using large current output, use thicker and shorter wires as much as possible, and the output time should be as short as possible.
The "upper limit" column is to set the effective value of the allowable output of each phase. If you are afraid that a certain phase will inadvertently output too much and damage the relay during the experiment, you can set an "upper limit" for the phase, and the phase will never exceed the limit during the experiment operation, which can ensure the safety of the relay. The default value of "upper limit" in the system software is the large output amplitude of current and voltage.
 
      In the lower left corner of the interface, the current state of the line voltage and the zero sequence, positive sequence and negative sequence components of the current are displayed. Through this window, not only can the line voltage change in real time be monitored, the value of this part is completely based on the various values ​​given above. The current value of the phase component is calculated and cannot be set. It is convenient to record the action value of the protection according to different needs. For example, if the protection setting value is given to the line voltage when the voltage is low, then the protection action can not only be viewed from above. You can intuitively see the value of the phase voltage when the protection is activated, and you can read the value of the line voltage directly from this window, without the need for the tester to calculate it yourself.
 
      The relay protection tester has brought great convenience to our electric workers, so when using it, we need to know how to operate and how to maintain the instrument, so that it will be handy during use.
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