Does anyone know if such a device exists. I'm looking for something which can read a 0-40mA (or greater) signal, convert the signal to digital and apply a formula to it. Then convert the result back to a 0-20mA analog output?
Another possibly critical issue which I realise I have failed to mention in previous posts, is the noise coming from the drive. When running the motor, the drive outputs a very high pitched "squealing" noise. I have noticed this on drives with long lead filter before, but not to this magnitude...
I've had a few people outside this thread leaning towards the incoming power, and that seems to be where this is going also. I have a few questions/comments on this:
1. How would I check the power quality? Is there some sort of instrument/logger which can accurately give me the output of the...
thewellguy, skogsgurra and jraef - There is a check valve installed in the water line, and the drive was switched from manual to auto without shutting it down, so it would be unlikely that the motor would be spinning backwards in this case. It's something to note for the future anyway thanks (i...
thewellguy - i didn't shut the well down when switching from auto to manual.
waross - We checked the incoming voltage several times while it was running and it checked out OK. There are no added capacitors in the system.
resqcapt19 - this is very interesting, i believe the drives were sitting...
Yes Marke, the company which built the system has put in place an output reactor and a long lead filter (which they place on all systems where the motor lead to the motor is longer than 40-50m). I'm not sure what the specs of these devices are but I assume they are fit for purpose seeing as they...
I recently had the pleasure of being 2ft away from an enclosure which housed a 40HP VFD when an internal capacitor blew. The events leading up this are as follows:
Power supply: 100kVa 480V Generator
VFD: 40HP Yaskawa G5 (Current rating 51A)
Load: submersible pump consisting of a 20HP 3450rpm...
