Current Monitoring

Current relays monitor the operating currents of individual loads to detect disturbances in the supply, such as undercurrent relay line breaks, fuse failures, or other interruptions.

On the other hand, overcurrent relays monitor for overloads by switching loads.  Motor protection switches and fuses are not to be replaced with overcurrent relays.

Current relays with a small measuring range (20mA) can be used as limit switches in measuring circuits, and can easily be used to replace gauges with instruments with limit contacts.

Monitoring ofFunctionAuxiliary VoltageType
AC-CircuitsUndercurrent

24VAC
42VAC
115VAC
230VAC

NWC1100
OvercurrentNWC1200
DC-Circuits

Undercurrent24VAC
42VAC
115VAC
230VAC
NWC2100
24VDCNWC2102
Overcurrent24VDCNWC2110
24VAC
42VAC
115VAC
230VAC
NWC2200
24VDCNWC2202