Secondary Injection Test Set HYJB-III

Secondary Injection Test Set HYJB-III HYJB-III Relaying protection tester is applied to test protection replay based on voltage and current operation. The main function of the tester include: calibration of voltage and current operation relays, secondary circuit inspection, trip value of circuit breaker test, switch on and off time measurement of circuit breaker and so on. It’s a low cost, simple operation and reliable performance device for secondary circuit test. 1.DC