The NGRM500 is only intended for use in high-resistance grounded systems. In these systems, the NGRM500 monitors:

  • the current through the neutral-grounding resistor (NGR),
  • the voltage between the star point of the transformer and earth (voltage drop across the NGR),
  • the condition of the NGR.

In order to meet the requirements of applicable standards, customised parameter settings must be made on the device to configure it for local equipment and operating conditions.

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