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Driefasenbewakings beveiligingsrelais bewaakt fase asymmetrie spanningsuitval Optické a akustické signalizační přístroje the device is equipped with Mark:20A the device is equipped with a switching contact that allows this hygrometer to be used for any task in the field of humidity control Parameter Value Operating voltage (Un) 140 300 VAC Operating frequency 50 60 Hz Power consumption <4 VA Operating temperature 20 °C Phase protection relays are designed to safeguard three phase loads against damage caused by line voltage Mounting on DIN rail
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