NK Technologies AG Series Ground Fault Sensors

Broad Range of Options to Match Application Needs
-N.O./N.C. solid-state switch or mechanical relay outputs.
-Normally energized or normally de-energized contacts.
-Noise Immunity option for use in EMI/RFI sensitive environments.
Setpoint Options Maximize Ease-of-Use
-Field selectable 5mA, 10mA or 30mA setpoints on the AG3 “Tri-set” model makes user adjustments fast, sure and convenient.
-Single factory calibrated setpoints available form 5mA to 950mA.
Compatible with Standard Equipment
-Applicable on single- and three-phase systems.
-Ideal for use with shunt trip breakers.
-Magnetically isolated from monitored circuit and control power.
Agency Approved
-UL, CE approved.

“Zero Sum” Operating Principle: In three-phase delta and wye systems, under normal conditions current in the ‘hot’ leg of a two-wire load is equal in magnitude but opposite in sign to the current in the neutral leg. As a result, the electromagnetic fields surrounding these two conductors cancel, producing a “zero sum current.” As soon as current leaks to ground (fault condition) the two currents become imbalanced and a net magnetic field results. AG Series sensors monitor this field and trip alarm contacts when the leakage rises above setpoint.

Applications
Personnel Protection (typically 5mA)
Detects sensitive ground fault conditions, which may be injurious to personnel and processes. Functions as sensor and alarm trigger when part of an overall ground fault protection system.
Equipment Protection (typically 10mA or 30mA)
For applications where personal proteciton is not the primary concern, higher setpoint capability helps eliminate nuisance tripping while still providing adequate ground fault detection to protect machine  electronics.
Regulatory
Meets requirements as stipulated by governmental and industrial regulatory groups for ground fault sensing.