2.4kV - 15kV Neutral Grounding Resistors (NGR's)

neutral grounding resistors
neutral grounding resistor

2.4kV-15kV Neutral Grounding Resistor (NGR)

System Ratings:
  • Voltage: 2.4kV-15kV (3Ø)
  • Current: 100A-400A
Designed & factory tested to IEEE Standard 32-1972
LZR-P available to meet all applicable specifications from: Seismic Zone 2 requirements of the Uniform Building Code:

NGR Assemblies

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Low and High Resistance Medium Voltage Grounding System

Neutral Grounding Resistors and Reactors have “low impedance grounding.” They will reduce the stress and amount of damage to your power system equipment. They do this by controlling the magnitude of the ground fault currents. When used in generator neutral, these devices will also limit the amount of the generator available Line to Neutral fault current below the design limits. These limits are set by the NEMA MG1 generators design standard.

Neutral Grounding Resistors and Reactors will reduce the magnitude of harmonic currents. They will also help switchgear sense that there is current in neutral/ground. The NGR’s help dissipate that current.

Standard Enclosure:

  • Filtered ventilation louvers
  • NEMA 1/3R for indoor/outdoor applications
  • Hot Dip Galvanized
  • Bottom Entry/Exit

Enclosure Options:

  • Aluminum, Stainless Steel (304 or 316)
  • Powder coated ANSI 61 Gray or custom colors
  • Connection Bushings:
    One or Two / Top or Side Mounted

Neutral Sensing & Monitoring:

  • Window Type or Bar Type Current Transformer

High Resistance Grounding System

5kV-15kV Neutral Grounding-Reactor High-Resistance Generator Transformer Grounding-System
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