Phase monitor, product range: measuring and monitoring relays EMR, multifunctional, power supply from measuring circuit, response/release delay: none = 0 or adjustable 0.1 - 30 s, threshold values and asymmetry adjustable 2 - 25 % of the mean value of the phase voltages, automatic phase sequence correction (can be deactivated), also suitable for single-phase networks., monitoring voltage per phase: UN= 180 - 280 V AC, 50/60/400 Hz V AC, monitoring of: phase sequence (can be deactivated), phase failure, overvoltage, undervoltage, asymmetry, neutral conductor break, supply voltage: 180 - 280 V AC, 50/60/400 Hz, installation position: any, fastening: snap-on fastening DIN rail IEC/EN 60715, width: 22.5 mm, standards and regulations: IEC, UL, CSA, CCC, GL