ABB 2CDE165000R2001 E236-US1 Undervoltage relays 3Ph+N,2Wechsler

The green LED lights when the supply voltage is applied. If each phase voltage exceeds 195 W (US1) or the preset threshold value (US2) with reference to the neutral conductor including the hysteresis when the device is switched on, the relay switches immediately into the operating position. The yellow LED lights. If at least one phase voltage falls below the threshold value, the relay goes back to its normal position and the yellow LED is extinguished. If phase 2 also fails, the green LED also fails. The neutral conductor must be connected!