Current 180 degrees out of phase with Voltage
Current 180 degrees out of phase with Voltage
(OP)
Gents,
Little help please. Currently investgiating some intermittant faults on a server room distribution board. At the moment the UPS systems kick in and out randomly as a result of suspected voltage fluctuations.
To check our supply we monitored the supply to the board with a power quality meter and found from looking at the phasor diagram the whilst blue and yellow pahse had current slightly leading voltage blue phase was 180 degrees out of pahse with the voltage.
We suspect it may be due to a neutral fault but would like some back up.
Has anyone come accross this or from theory suppose what is the problem other then a neutral fault?
Little help please. Currently investgiating some intermittant faults on a server room distribution board. At the moment the UPS systems kick in and out randomly as a result of suspected voltage fluctuations.
To check our supply we monitored the supply to the board with a power quality meter and found from looking at the phasor diagram the whilst blue and yellow pahse had current slightly leading voltage blue phase was 180 degrees out of pahse with the voltage.
We suspect it may be due to a neutral fault but would like some back up.
Has anyone come accross this or from theory suppose what is the problem other then a neutral fault?





RE: Current 180 degrees out of phase with Voltage
RE: Current 180 degrees out of phase with Voltage
RE: Current 180 degrees out of phase with Voltage
When everything looks crazy, start checking the continuity of the return lines.
RE: Current 180 degrees out of phase with Voltage
respectfully
RE: Current 180 degrees out of phase with Voltage
RE: Current 180 degrees out of phase with Voltage
Apologies to all.
RE: Current 180 degrees out of phase with Voltage
RE: Current 180 degrees out of phase with Voltage
Don't feel bad, I get about 10% of my measurements hooked up backwards the first time even though I try to be careful.