Products: Neutral Grounding Resistors
 

KEY REASONS
FOR LIMITING FAULT CURRENT

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

  1. To reduce burning / melting effects in faulted electrical equipment, such as switchgear, transformers, cables and rotating machines.
     
  2. To reduce mechanical stresses in circuits and apparatus carrying fault currents.
  3. To reduce electric shock hazards to personnel caused by stray ground fault currents in the ground return path.
  4. 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.
     
  5. To secure control of transient over voltages.
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I-GARD’s Neutral Grounding Resistors protect power generators and transformers and other related equipment against faults and intermittent events such as lightning strikes.

When something goes wrong, nothing protects like I-GARD.

A BETTER NGR
For Low Resistance Grounding

I-Gard offers a complete range of Neutral Grounding Resistors from 277V to 69,000 Line to Neutral volts (115kV systems) and these are used for resistance grounding of industrial power systems. They are usually connected between earth ground and the neutral of power transformers, power generators or artificial neutral transformers.


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NOT ALL NEUTRAL GROUNDING RESISTORS ARE THE SAME!

I-GARD’s Neutral Grounding Resistors have unique properties that make them better. It starts with the element. A better grade of stainless steel with a lower coefficient of resistivity ensures that the over-current relay works - it responds when it should. Not all stainless steel does that. Read more about “The Element Difference”. >

Add the optional SIGMA Monitoring Relay – a combination Neutral Grounding Resistor (NGR) monitor and ground fault relay, and you have a complete system of protection – a better NGR.

Learn more >
 
 
 

Design: Larkin & Company