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How to read earth lamps in a 3-phase system?

03 Oct '19, 04:45

Oct. 3, 2019, 4:45 a.m.
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The earth faults are indicated by lamps as follows:

  • lamp is bright = no fault
  • lamp is dimmed = light earth fault
  • lamp is dark = hard earth fault
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03 Oct '19, 04:49

Oct. 3, 2019, 4:49 a.m.
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