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In the electric power, the microcomputer relay protection tester is often used. It belongs to protection relay testing equipment. It is a high-precision and powerful test instrument, which is liked by the majority of electric workers. However, the use of this equipment is more complicated and there will be some problems in use Many problems, such as: how to set the delay of the microcomputer relay protection tester, in order to give you a brief introduction to how to set the delay of the microcomputer relay protection tester.
Test time: The time limit between the start of the fault and the end of the test. Generally, it should be ensured that the protection can complete the entire “trip→reclose→re-trip” process within this time.
Turnover time of binary output: After a certain period of time after the first fault output, binary output 1 will close the output.
Trip delay: Simulate the tripping action time of the circuit breaker. According to the connection of the binary input, the tester will enter the voltage and current state after tripping once it receives the trip signal of the protection and after the “trip delay”.
Closing delay: simulating the closing action time of the circuit breaker, the tester will enter the voltage and current state after closing once it receives the closing signal of the protection according to the connection of the opening input, after the “closing delay” has passed .
Fault nature: When selecting “transient” fault, the tester will only output the fault quantity once in the whole test process. When the tester receives the protection action signal or reaches the set “fault duration”, it stops outputting the fault quantity , And switch to output the normal voltage and current, even after receiving other binary input signals, the tester still maintains the normal output unchanged. When selecting the “Permanent” fault, the tester outputs in the following order: Start test (output normal value)-→ output the first fault value set on the interface-→ receive protection trip action signal (output normal value) ―→Receive the reclosing action signal (output the fault quantity set on the interface again, if the simulation is a transitional fault, the fault phase may be different from the first time)―→receive the protection trip action signal again (output again Normal volume, and no longer change, wait for the manual to stop the test). If the post-acceleration function of the protection needs to be tested, the permanent fault should generally be selected.
