Andrew AMP Electrical
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Derek3 reacted to a post in a topic:
Unsafe Broken Neutral conditions in 3-phase 4-wire Low Voltage systems:
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This is a very interesting and life threatening situation. I was called out to a client last night who, then the lights flickered, smelled burning in parts of the house. When we got there the DB had no burned smell like one has with a failed breaker and we measured over 400V phase to Neutral, but only around 230V Phase to earth. The supply is 3-phase. This is confusing as one can assume Neutral is fine (because your tester shows a reading) but the elevated voltage is the clue indicating a supply Neutral failure. Square root of 3 X 23V give you around 400V. The smell was coming from extension cords and appliances in various parts of the house that are not designed to operate at those voltages. Very dangerous, and very expensive type of fault. The device mentioned in this article is an absolute essential item
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Andrew AMP Electrical joined the community
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Hi British Racing Green. Your post came up on a Google search. I've inherited a client with 2 x Kodak OGS5.6 in parallel and 3 x FiveStar Lithium Ion batteries. If I understand you, using 568B, all pins at both ends are the same except for Pin 5 at battery to go to Pin 3 at Inverter? Appreciate your help! Andrew