Current Relay Switch Helps Monitor Motors

Nov. 21, 2012

NK Technologies’ ASXP current-sensing switch is now available with a user-adjustable setpoint from 1–80 A. The switches are powered versions of the company’s popular current switches with integral time delay. For use with 24 VAC/DC or 120 VAC supplies, these switches deliver OEM-caliber accuracy, precision tolerances, low hysteresis and an operation range between 40 and 100 Hz — functionality reportedly ideal for monitoring single- and three-phase motors.

They come standard with a solid-core enclosure and LED indicators for trip-point contact status. In motor-protection applications these sensors provide proof-of-operation and detect current draw changes caused by pumps running dry or impending bearing failure.