Active test - DUT at mains voltage during the active test, the differential current, the direct protective conductor current or contact current with mains voltage is determined on the device under test.
This is done in 2 steps, whereby the test device automatically reverses the connection of the test object. This is the real operation, so this test can actually always be used. Exceptions must be made for devices with very high starting current, such as Motors and halogen lights are made. By switching on the mains, otherwise the SECUTEST switching relay will be very heavily stressed, resulting in faster wear.