Power detection technology / Power detection

Detection Technology

Wiring instructions for relay protection tester

time:2021/1/22   source:华天电力  reading:236 time

The relay protection tester is connected to a 220V AC power supply, and the ground wire jack is reliably grounded. The main body of the test instrument must not be connected to a 380V three-phase AC power supply or DC power supply. Before the test, the ground wire jack must be reliably grounded, otherwise it may be damaged According to different test contents, connect the voltage, current, and switch-in and switch-on wiring of the device.

The voltage circuit cannot be short-circuited or overloaded. The load of the current circuit should be based on the impedance value given in the technical parameters to avoid overloading the test results. When the voltage source is overloaded or short-circuited, the tester will automatically cut off the power amplifier power supply and interrupt the test, and send out at the same time Overload alarm signal, the large load current of each phase of the voltage source is 0.65A.

Protection Relay Test Set.png

If the high current output time is too long and the temperature of the power amplifier is too high, the tester will automatically turn off the power of the power amplifier and give a warning sound. At this time, the test should be stopped and the test can be continued until the power amplifier has cooled down. The input binary input potential has a direction In general, it is better to use empty nodes.

The negative terminals of A, B, and C on the input terminals of the binary input are connected, and are not connected to the common terminal “N” of the voltage and current output terminals and the ground wire (such as the panel and the chassis). It is a floating ground and the input The terminal is compatible with empty contacts and potential (10-250V), but has directivity to the input of live contacts. A, B, C, and H are connected to high potential (+), and the negative terminal is connected to low potential (-) of the live contact. Computer Only the flip of the contact state can be detected. If the connection is reversed, the detected state will always be closed. If there is an emergency problem during the test, quickly exit the power amplifier button, and then turn off the power of the host.

In order to ensure the accuracy of the test, the external circuit of the protection device should be disconnected, and the voltage N and the current N should be at the same common ground. Do not place the device in the open and get wet by rain.

For safety reasons, do not turn on the power switch when connecting the instrument and the relay, and then turn on the power switch for testing after checking that the wiring is correct.

The output power supply cannot be short-circuited, and the contact terminals cannot be short-circuited with the output power supply to avoid damage to the instrument. Please do not directly turn off the power supply in the output state to avoid malfunction of the protection due to the output error when it is turned off. The binary input is compatible with empty contacts and potential (0 -DC 250V), when using live contacts, the high potential of the contact (positive) should be connected to the common terminal +KM.

When using the relay protection tester, do not block or close the air vents of the fuselage. Generally, place the instrument on a standing stand or place it slightly tilted with the supporting legs open.

Copyright description: all articles, pictures, video and other materials on this site belong to wuhan huatian power automation co., LTD. For use, please contact us; Permission to reprint articles, pictures, video and other materials please quote "from: huatian power".

High current generator temperature rise test  | 2021/1/22 | reading234time Judge the failure of DC high voltage generator  | 2021/1/21 | reading242time return