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High-Resistance Grounding Systems High-Resistance Grounding Systems

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Power System Grounding Equipment for Fault Location  (4.85MB)
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Key Interlock Systems  (219.34KB)

The high resistance grounded neutral system with traceable signal to fault, is one in which a high-value resistor has been inserted in the neutral connection to ground to limit the resistor current under ground-fault conditions to a value not less than the total system charging current, resulting in a total ground fault current of approximately the square root of 2 times the charging current.

The facility of quickly locating ground faults with the pulsing and tracing equipment on the Powercon system lessens the probability of a second ground fault shutting down two circuits simultaneously.

Powercon's High Resistance Grounded Systems are applied where:

  • Electric Power Service immediate interruption on first phase to ground fault is to be avoided. This prevents disorderly shutdowns of equipment which may result in severe financial losses, production delays, or hazards due to immediate loss of electric power.
  • Transient Overvoltage Control on arcing ground faults protection will be obtained.
  • Minimization of Personnel injuries from arc flash due to accidental line to ground faults.

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