Network monitoring relay with phase sequence monitoring. It features a potential-free changeover contact rated for 10A/250V AC. Suitable for 230V LED lamps up to 200W and incandescent lamps up to 2000W. The standby loss is only 0.8 watts. The device is a modular installation unit for mounting on a DIN rail according to DIN-EN 60715 TH35. The width is 18mm and the depth is 58mm. It monitors the 230V AC voltage between 1 to 3 phase conductors and the neutral conductor, as well as the phase sequence (clockwise) in the rotary switch positions 2 Ph and 3 Ph. In the position L1/L2/L3, only the phase sequence is monitored, regardless of the network voltage. The supply voltage L1-N is between 180-250V/50Hz. If L1 fails, the relay drops immediately without delay. The lower rotary switch on the front allows for the setting of two pickup and dropout voltages, and the number of monitored phase conductors must be specified. U1: 161V dropout voltage and 185V pickup voltage; U2: 196V dropout voltage and 206V pickup voltage according to VDE 0100, Part 718. An LED display indicates the correctly applied voltage. In case of incorrect polarity or a missing phase conductor, the LED blinks rapidly. The dropout delay can be set with the upper rotary switch from 0.1 to 8 seconds. While the dropout delay time is running, the LED blinks slowly. The pickup delay is 0.5 seconds. The maximum device protection is rated at 16A.