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 e1uu230v01ac and dc voltage monitoring in 1 phase mains overvoltage monitoring adjustable switching threshold us min 75 115 of un fix adjusted hysteresis 3 measuring ranges 24 v dc ac 230 v a