thank you all for your post
jraef, i was just repeating what i was told. i told my managment to go back on the company and try to shame them for the extra plant downtime and the sloppyness. i think it was a little too easy for the supplier to sidestep this.
i am responsible for specs on the...
We recently bought a 4160V 400HP motor. We specified hp, rpm's and frame number. Our system is not sensitive enough as to where small changes in slip and the like do NOT affect this particular system.
When we specified the three stats we assumed that they would be within a certain NEMA...
just a simple question,
what does the diagram for a 3p open circuit transition autotransformer look like? are the neutrals permanently wired together?
i am fully aware of the drawbacks, found plenty of info on closed circuit but none on open circuit. thanx
to further busbar's point-
amp draw is only 1/3 of the total picture. you can get most of the picture with 1.amp draw 2.voltage (line to line and line to ground, carefull, some VFD's don't like you taking these measurements while it is running) 3.frequency
excluding a scope of figure...
Sorry it took so long for me to get back, thank you for all of your valuable posts, especially rbulsara, thanx
let me clarify and answer some things
1. i would never, ever, enter an energized MV cabinet. even with the disconnect down, ground stips contacted and hot sticks used; i still will...
newbie here
recently got a new reduced voltage starter for our 4160V 400HP motor at our plant. doesn't work.
single phase transformers, 167,167,&250 kva. i can "hear" a two stage start(reduced voltage and full voltage). the motor is a rebuild from corporate stock in North Carolina (we are...
