phase rotation incorrect at origin of install .

[R-fur]

Can you trace the tails between the meter and the incoming side of the isolator.

 

[me2]

Can you trace the tails between the meter and the incoming side of the isolator.

yes right next to it, why?
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Understand the inconvenience of the down time, however the phase rotation can be reversed at the meter, L2L2 L3L3 swapped as complete pairs. No reversing is needed on the installation side.

hi dave , I am not sure i follow what you mean here. surely if anything is reversed upstream (so to speak) the end appliances that rely on phase rotations for their direction (3 phases motors in this case) will be running in the opposite direction . Unless i am missing something obvious .

 

[7029 dave]

yes right next to it, why?
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hi dave , I am not sure i follow what you mean here. surely if anything is reversed upstream (so to speak) the end appliances that rely on phase rotations for their direction (3 phases motors in this case) will be running in the opposite direction . Unless i am missing something obvious .

I cant explain the science, Marconi a member on here (the professor) is the man.
So im not even going to attempt.

 

[R-fur]

yes right next to it, why?

Because as I already said the meter is usually installed with standard rotation otherwise it is not within its certification. You are saying the rotation at the isolator is wrong. If the tails are straight then it is a DNO issue, if the tails are crossed then it is a customers issue. Albeit that they would need to pay the DNO to swap them.
Having non standard rotation in an installation is not a panic situation as long as every one electrical is aware of it.

 

[davesparks]

thanks dave ,I will do but the only potential problem that I see with that is that the customer will inccur more down time for his premises and the rotation of all the 3 phases motor will need to be reversed .

Have you checked the phase sequence? Is it consistent throughout the installation?

If all the motors are running the right way then either they have all had rotation corrected, it has been corrected elsewhere or there is a mistake in your testing
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Understand the inconvenience of the down time, however the phase rotation can be reversed at the meter, L2L2 L3L3 swapped as complete pairs. No reversing is needed on the installation side.

That won't change the phase rotation problem that the OP thinks they have. It will only change the rotation at the meter.