An isolation transformer is used for testing portable RCDs. It enables service providers to trip a portable RCD without tripping the main switchboard RCD.
Simply plug PRO-ITX into mains power outlet, plug the portable RCD under test into PRO-ITX, connect RCD tester to portable RCD and conduct the test.
Test Current 30mA x2 or x5 meeting AS3760 and AS3190
Thermal Protection from overload short circuit currents
Mains Lead 1.5m long