HYJB-III Relay tester

relay tester introductionHYJB-III Relaying protection tester is applied to test protection replay based onvoltage and current operation.The main function of the tester include:calibration ofvoltage and current operation relays,secondary circuit inspection, trip value of circuitbreaker test,switch on and off time measurement of circuit breaker and so on.It’s alow cost, simple operation and reliable performance device for secondary circuit test.relay tester technical index1.DC