Ground Fault Sensors - NK Technologies - #1

Kl iy Tû^htl/^l/^rtlûC ^{NK Tec}h^nol^og^ies • ⁵⁰⁰ Division Street • Campbell, CA 95008-6906

I eCMMOlOgieS 800.959.4014 • www.nktechnologies.com • sales@nktechnologies.com

AG Series Ground Fault Sensors help protect people, products, and processes from damage by ground fault conditions by monitoring all current-carrying conductors in grounded single- and three-phase delta or wye systems.

"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.

• 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.

• Field selectable 5mA, 1 OmA 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.

• Applicable on single- and three-phase systems.

• Ideal for use with shunt trip breakers.

• Magnetically isolated from monitored circuit and control power.

• UL, CE approved.

• 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.

• For applications where personal protection is not the primary concern, higher setpoint capability helps eliminate nuiscance trip­ping while still providing adequate ground fault detection to protect machine electronics.

• Meets requirements as stipulated by governmental and industrial regulatory groups for ground fault sensing.