So, you think it will slow down with no current increase, generator effect, or vibration? I don't think it will like being instantly locked to a different voltage while running at full speed, especially with that momentum. It wouldn't be coasting.
It's a horizontal compressor. The mechanics and engineers are thinking it may be a case distortion on the gear box. They changed all internal parts a few weeks ago. The compressor was sent to the manufacturer (Cameron)this week. This has become a high visibility problem. It has cost a lot of...
We aren't gettin an unbalance. We have a Multilin 469 on it. It trips pretty fast on unbalace. We're having PDMA testing done on motor. I was wondering if; when R contact re-introduces the starting transformer at full speed, it might cause axial thrusting in the motor, that could possibly damage...
I'm an elecrical specialist. I've been working on MV motors, and controllers for many years. I recently had a call to a facility with mystery trips on a compressor (see title). They had some data recorded by the DCS which showed the current increased from 280 to 500 amps, at which time the...
Thanks for the replies. I guess it's OK then. I've never come across a connection like that. I'm still not sure why they didn't just run the Ammeter through one phase by itself? One reason I questioned it; the motor has been replace quite a few times due to winding failures.
First of all; I'm a tech not an engineer. This doesn't look right to me at all. I'm thinking the ammeter (ACA) is only going to see the unbalance between A and C phases (jumper on right of PFFR relay). I don't know what the formula for this would be, but in the past I've always seen an ammeter...
