Microcomputer relay protection tester abbreviated as relay protection tester



is the core tool in the detection of secondary equipment in power systems.

If the previously mentioned mine stray current tester is the "minefield clearer" underground, and the lightning counter calibration tester is the "physical examiner" for surge arresters, then the microcomputer relay protection tester is the "all-around coach" for the entire power grid safety defense line. Its core task is to conduct comprehensive simulation drills and performance verification for the "safety guards" in the power system—relay protection devices—ensuring that when real grid faults occur, the protection devices can act accurately within milliseconds to clear the fault.

⚙️ Core Uses and Importance

Relay protection devices are the first line of defense for ensuring grid safety, but they are usually in a "standby" state. The function of the microcomputer relay protection tester is to artificially simulate various complex faults that may occur in the power grid, to test whether the relay protection devices can accurately perform protection actions such as tripping within the specified time.

Core functions: It can verify, test, and simulate faults for various types of relays (such as current, voltage, differential, impedance, frequency relays, etc.) as well as complete microcomputer protection panels.

Wide application: It is widely used in the commissioning and maintenance of power systems in industries such as power plants, substations, railways, petrochemicals, and mining.