EMR4 EMR4-N... liquid level monitoring relays Part Name Image Description Supply voltage Response sensitivity EMR4-N100-1-B Monitors the level of conductive liquids Monitors the ratio of mixtures of conductive liquids Selectable: protection against running dry  or overflowing 220 – 240 V AC 5 Ώ – 100 kΏ EMR4-N500-2-B Monitors the level of conductive liquids Monitors the ratio of mixtures of conductive liquids Selectable On-delay or Off-delay between 0.5 – 10 s 250 Ώ – 500 kΏ EMR4-N500-2-A  Monitors the level of conductive liquids Monitors the ratio of mixtures of conductive liquids Selectable On-delay or Off-delay between 0.5 – 10 s 24 – 240 V AC/DC EMR4-R... insulation monitoring relays Part Name Image Description Supply voltage Insulation resistance range Ώ EMR4-RDC-1-A Monitors the insulation resistance in nonearthed DC supply systems Selector switch for open- or closed-circuit principle With test and reset facilities Status indication via LEDs 24 – 240 V AC/DC 10 – 110 kΏ EMR4-RAC-1-A Monitors the insulation resistance between non-earthed AC supply systems and the protective conductor/earth Tripping function memory Insulation monitoring in 1- and 3-phase AC supply systems Test via local test button or remote test operation Status indication via LEDs to VDE 0413 / Part 2 EMR4-I... current monitor relays Part Name Image Description Supply voltage Current measuring range EMR4-I1-2-A Switching hysteresis adjustable from 5 – 30 % Response delay 0.1 – 30 s EMR4...-A: monitors one upper or lower limit EMR4...-B: monitors one upper limit Extension of the measurement range possible with current transformers 24 – 240 V AC/DC 3 – 30 mA 10 – 100 mA 0.1 – 1 A EMR4-I15-2-A 0.3 – 1.5 A 1 – 5 A 3 – 15 A EMR4-I15-2-B 220 – 240 V AC 0.3 – 1.5 A 1 – 5 A 3 – 15 A EMR4-F... phase sequence relay Part Name Image Description Supply voltage Monitoring voltage EMR4-F500-2 Monitors three-phase systems for phase sequence and phase failure Supply voltage = voltage being monitored 200 – 500 V AC EMR4-A... phase imbalance monitoring relay Part Name Image Description Supply voltage Monitoring voltage EMR4-A400-1 Monitors three-phase systems for phase imbalance Detects phase failure even at 95% voltage feedback from the motor Response delay: 0.5 s Phase imbalance response threshold adjustable from 5 – 15 % Phase sequence detection Supply voltage = voltage being monitored 380 – 415 V 50 Hz EMR4-W phase monitoring relay Part Name Image Description Supply voltage Monitoring voltage adjustable from EMR4-W500-2-C Monitors three-phase systems for phase sequence, over- and undervoltage and phase failure (< 0.6 x Ue) 3-phase voltage monitoring within a range Selectable On-delay or Off-delay (0.1 – 10 s) 160 – 330 V AC Umin 300 – 380 V AC Umax 420 – 500 V AC EMR4-W500-2-D 300 – 500 V AC EMR4-W580-2-D 300 – 500 V AC Umin 350 – 430 V AC Umax 500 – 580 V AC   View Control Relay Catalog and Engineering Information

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