I-Gard offers a complete range of Neutral Grounding Resistors from 277V to 69,000 volts and these are used for resistance grounding of industrial power systems and are usually connected between earth ground and the neutral of power transformers, power generators or artificial neutral transformers.

Neutral Grounding resistors are similar to fuses in that they do nothing until something in the system goes wrong. Then, like fuses, they protect personnel and equipment from damage. Damage comes from two factors, how long the fault lasts and how large the fault is.Ground fault relays trip breakers and limit how long a fault lasts. Neutral grounding resistors limit how large the fault is.

the key reasons for limiting the fault current through resistance grounding are:

To reduce burning / melting effects in faulted electrical equipment, such as switchgear, transformers, cables and rotating machines

To reduce mechanical stresses in circuits and pparatus carrying fault currents

To reduce electric shock hazards to personnel caused by stray ground fault currents in the ground return path

To reduce arc blast of flash hazard to personnel who may have accidentally caused or who happen to be in the lose proximity to the fault current

To secure control of transient over voltages