Enya monitoring relays ensure the availability and reliability of plants and machinery owing to their accurate recording of parameters the enya series covers all functions ranging from current and voltage monitoring up to temperature fill level and phase monitoringshort description e1iu5aac01dc voltage monitoring in 1 phase mains undercurrent monitoring adjustable threshold level is min 10 100 of in fix adjusted hysteresis measurement range 5 a supply voltage 230 vac