Model s40a (3*40a, 3*150v) has large lcd display and panel control facilities. No external pc is required. It can easily test many types of relays, including distance relay, df/dt relay. The rotating mouse and quick touch buttons make the operation very easy. 3*40a, 3*150v Additional 200ma ac current source Aux dc (24v, 110v, 220v) 4 binary inputs, 1 binary output Locally with color lcd (universal relay tester, relay test equipment, 3 phase relay test set, secondary injection test system)
