The Emergency Lighting Test Switch, E-PRO41, is intended for testing single phase circuits for emergency lighting according to AS/NZS 2293.1:2018. The E-PRO41 is normally closed, allowing the full supply to emergency lighting circuits up to 20A per circuit. On a periodical basis and in accordance with the norm, the E-PRO41 enables the operator, through a key selector or front buttons, to operate the test switch and cut off the power for a duration either preset (60, 90 or 120mins) or other discrete times programmable through the front buttons. An OLED display allow count down as well as advance sequential programming. Statistics of operation are also available within the unit. The E-PRO41 allows the command of an external contactor through a dry output contact up to 5A 30 VDC or 250 VAC.