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Phase rotation

Hi all I think its fairly common knowledge that the phase sequence on Merseyside is different from most of the rest of the country but what I didn't know is that South London is also different Blue Red Yellow apparently someone got it mixed up at battersea power station and its been that way since the 1930s is this common knowledge ? Must be very confusing when wiring up motor loads and other phase sensitive gear its amazing to think one cock up 70 plus years ago is still having an effect now

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0 mapj1 over 3 years ago

Well I make my phase indicator light up happy if the rising edge zero crossings occur in the order L1, then L2 then L3. Folk can then move the wing nuts and coloured sleeves around on the other end until the happy light comes on, all 3 phase lights are more or less equal brightness and the NE light is off. Only then should the main switch be closed.

Mike
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0 mapj1 over 3 years ago

Well I make my phase indicator light up happy if the rising edge zero crossings occur in the order L1, then L2 then L3. Folk can then move the wing nuts and coloured sleeves around on the other end until the happy light comes on, all 3 phase lights are more or less equal brightness and the NE light is off. Only then should the main switch be closed.

Mike
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Phase rotation

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