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Unit
Description
Features
Sensitive Ground Fault Relays for grounded, ungrounded, resistance-grounded power systems
RCD 300M2 sensitive ground fault relay 10mA - 3.0A
GFR 4000 combination sensitive ground fault relay and off-line insulation resistance monitor 10mA - 3.0A,
250 K Ohm - 2 M Ohm
GFA 300 ground fault indication alarm relay for standby generators no CTs, 100-1200A
ELM 300 Ground checking monitor single or adjustable trip 1 - 10 ohms
Weldsafe 4000 combination sensitive ground fault relay and ground check monitor 10mA, 1 Ohm
RCCBs residual current circuit breakers 100-500V 10/30/100/500 mA, 2/4 pole
CT/600/.../1 Current transformers 1" - 8" internal diameter
Current Relays for ac/dc networks
NWC 1101
NWC 1201
ac undercurrent relay
ac overcurrent relay
0.1 - 1.0 nominal current, hysteresis, time delay
NWC 2101
NWC 2201
dc undercurrent relay
dc overcurrent relay
0.1 - 1.0 nominal current, hysteresis, time delay
Insulation Monitoring for Ungrounded Power Systems
NWI 1100 insulation monitor - ac 24/42/115/230V 10 K Ohm - 100 K Ohm
NWI 5100 insulation monitor with LED bar chain 10 K Ohm - 100 K Ohm
NWI 2100 dc 24/48/60/110/220V 20 K Ohm - 100 K Ohm
NWI 2101 dc 30 - 350V 20 K Ohm - 100 K Ohm
NWI 2900 dc 24/48/60/110/220V - panel mount 20 K Ohm - 100 K Ohm
Votage Relays for ac/dc networks, 1 and 3 phase
NWV 1101 undervoltage relay - 1PH ac 0.75 - 1.05 nom. voltage, hysteresis, time delay
NWV 1201 overvoltage relay - 1PH ac 0.95 - 1.25 nom. voltage, hysteresis, time delay
NWV 1102 undervoltage relay - 1PH ac 220V - 240V ac 170V - 240V
NWV 1202 overvoltage relay - 1PH ac 220V - 240V ac 200V - 280V
NWV 2101 dc undervoltage relay 0.60 - 1.1 nom. voltage, hysteresis, time delay
NWV 2201 dc overvoltage relay 0.90 - 1.4 nom. voltage, hysteresis, time delay
NWV 2102 undervoltage relay - dc 24/48/60/110V 0.75 - 1.05 nom. voltage
NWV 2202 overvoltage relay - dc 24/48/60/110V 0.90 - 1.4 nom. voltage
NWV 2102-2 undervoltage relay - dc 48V, 2 alarm levels dc 45 -50V...dc 40 -45V
NWV 3101 undervoltage relay - ac 3PH w/ neutral 0.75 - 1.05 nom. voltage, hysteresis, time delay
NWV 3201 overvoltage relay - ac 3PH w/ neutral 0.95 - 1.25 nom. voltage, hysteresis, time delay
NWV 3102 undervoltage relay - ac 380V - 415V, 3PH w/ neutral
ac 170V - 240V (L1/2/3 > N)
NWV 3302 combined over/under voltage relay - ac 380V - 415V, 3PH w/ neutral
ac 170V - 280V (L1/2/3 > N)
NWV 3402 asymmetry relay - ac 3PH w/ neutral
NWV 4200 ground voltage relay
Frequency Relays
NWF 1102
NWF 1202
under - frequency relay
over - frequency relay
NWF 3300 combined over/under voltage, over/under frequency - ac 400V, 3PH

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