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Resistance grounding is used for voltage between

  • Resistance grounding is particularly useful for medium voltage systems, typically those between 2.2 kV to 33 kV, where the potential rise during a ground fault can be high enough to cause insulation damage or electric shock hazards.
  • By limiting the potential rise, resistance grounding can help reduce the risk of equipment damage and protect personnel from electric shock.
  • In a resistance grounded system, a ground fault will result in a small current flowing through the grounding resistor, which limits the fault current and reduces the potential rise.
  • The high resistance value of the grounding resistor ensures that the system can continue to operate with a single ground fault, while also providing a means of detecting and locating the fault.