Asymmetry monitor, product range: measuring and monitoring relays EMR, power supply from measuring circuit, response delay: none = 0 or adjustable from 0.1 to 30 s, threshold values and asymmetry adjustable 2 - 25 % of the mean value of the phase voltages, monitoring voltage per phase: UN= 300 - 500 V AC, 50/60 Hz V AC, monitoring of: phase sequence, phase failure, asymmetry, adjustable threshold values: asymmetry, supply voltage: 300 - 500 V AC, 50/60 Hz, installation position: any, fastening: snap-on mounting rail IEC/EN 60715, width: 22.5 mm, standards and regulations: IEC/EN 60255-6, IEC255-6, UL, CE