i am doing my 2391 practicle shortley and never done 3 phase testing before. can any one tell me the write way of testing 3 phase from start to finish.ie l1 to l2 l1 to l3 and so on just to make sure i have got it write.cheers men !!!!
3 phase testing
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Wet Fish
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With you tester you put the l1 lead on l1 l2 on l2 and l3 on l3 if it wired corrcetly it wil be correct on display. I have a di-log 9073 for phase testing which goes in right sequence if I remember correctly. Best bet is to read instructions for tester. I don't think I have helped much here.
green-hornet
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From start to finish?
Thats a lot of testing.
Its not really complicated, just because you have three "lives".
Try to think as each phase as a seperate line in, and then multiply your testing by 3.
The main problem with 3 phase is to get a good balance, so each phase in an ideal world will draw the same amps.
Thats a lot of testing.
Its not really complicated, just because you have three "lives".
Try to think as each phase as a seperate line in, and then multiply your testing by 3.
The main problem with 3 phase is to get a good balance, so each phase in an ideal world will draw the same amps.
you also need to check phase sequence (612.12), not just rotation
As per Tuesday`s job (and Weds, Thu & prob. Fri.......)
Public house, with rented flat above. Huge commercial kitchen. 3Ph, 4 wire, 60A/phase incomer. All dist boards SP, from henley blocks, in tails ranging from 25mm to 6mm:_|
No means of isolating whole installation.
I`m removing 5 scabarous old 3036 boards, and replacing with a 12 way, TPN. 12 other SP boards scattered around the premises. Not one RCD to be found, anywhere.
When I went to assess, they`d recently had the L1 service fuse replaced.
I did two load measurements, 1 hour apart:
1st test: L1-56A L2-6.8A L3-27A
2nd test: L1-79A L2-7.3A L3-41A
Think it may be a little unbalanced. Told the owner that balancing the supplies will pay for itself in electric within 6 months or so (currently paying
how will balancing reduce the total power used and therefore leccy bill?
