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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

A phase rotation indicator is a good idea. On stuff that has to travel abroad, I have been known to design one in permanently as part of the power conditioning going in, as it is only a neon indicator, a capacitor and some resistors. Along with other things like some phase and N-E voltage checks.... If you think things are a bit funny here you need to travel a bit south or east to realize we are actually quite good compared to some places.
Mike.
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0 mapj1 over 3 years ago

A phase rotation indicator is a good idea. On stuff that has to travel abroad, I have been known to design one in permanently as part of the power conditioning going in, as it is only a neon indicator, a capacitor and some resistors. Along with other things like some phase and N-E voltage checks.... If you think things are a bit funny here you need to travel a bit south or east to realize we are actually quite good compared to some places.
Mike.
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Phase rotation

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