How is it possible that the load power can be higher than the grid power ? I would have expected the grid to be slightly higher than the load on all 3 phases..
Participation is voluntary.
Alcocks Electrical Services | Alcocks Pest Control & Entomological Services | Alcocks Hygiene Services
Participation is voluntary.
Alcocks Electrical Services | Alcocks Pest Control & Entomological Services | Alcocks Hygiene Services
The total grid power( 3 pases added together) is higher than the load, but there are individual phases where the load power exceeds the grid power. That's what I was referring to.
Another question. You said there are 4 escalators if I'm not mistaken. Does each inverter feed 2 escalators or do both inverters , in parrallel, feed all 4 escalators ?
How about the phases on the one inverter (the one with the high current readings) are wired incorrectly?
My read is the evidence suggests the power draw readings are the most likely to be reasonably accurate. (DC draws off the battery - both in current and SOC after a couple of hours, one inverter fairly close to 3kW across all measures).
So what could cause a massive current discrepancy in a star supply to delta load situation?
In a rig installed by an IT guy.
On a supply with a phase rotation that runs the wrong way (compared to the rest of the country).
Participation is voluntary.
Alcocks Electrical Services | Alcocks Pest Control & Entomological Services | Alcocks Hygiene Services
The mains supply is a star config and transformer is 20m away so I don't see any reason that there should be a change
The phase rotation - don't see that making any difference
Can only think that it is PF of the motors and incoming PF
On the incoming there is a power factor correction panel that is working and keeping PF at 0.98
Did you like this article? Share it with your favourite social network.