Electrical Repair Questions? Ask an Electrician for Answers ASAP
Hello .. lets see if I can help you with this
Yes you would us the high voltage wiring diagram shown on the motor
can you describe that diagram for me please is this a 3 phase motor is this 3 phase power ??
yes, im feeding this motor out of a 277/480 volt panel and its a 3 ph motor
OK .. just checking the stupid stuff so I know we are both talking about the same thing
the diagram is your guide for wiring the motor
you have a 3 pole breaker .. sized for the rated amperage on the motor .. with the correct size wires .. right ?
does the motor have a motor starter .. ?? and are you OK with that ?
OK .. anything else that you need to know about this installation ?
if I just change the wiring diagram from low voltage to high voltage, will it then run on 480 volts?
i dont remember the numbers, but changing like 4 and 7 and 6 and 9 on the motor, like the diagram says, will it then be running on 480 or do I need to change something in the panel?
yes .. just like the motor diagram says .. you confirmed that the breaker is a 3pole breakewr in that panel .. so that is 480 3phase .. if you have a different breaker feeding this , then tell me and we can fix that .. ..
do you have a multi meter to check the voltage at the starter and the motor .. ?//
i have a 3 phase breaker
and since you are on 3 phase .. the motor may run in either direction ./. so after you connect the power , you will need to "bump" the motor.. meaning pulse it on just long enough to see which way it is rotating
i understand that
iof the rotation is right .. you are done .. if it is wrong then you simply swap two of the p[ower leads .. only two .. and that will change the rotation of the motor
Basically, low voltage on 277/480 system-the motor is running on 277v and high voltage on 277/480-the motor is running on 480v. Is that correct?
anything else ? thoughts .. concerns ? is this a replacement motor .. for a similar motor .. or some different motor at thios location ..
the 277 out of your panel is not 3 phase ..
so I need to have you confirm the name plate label information for this motor ..
the nameplate motor says 230/460v
OK .. but it also says 3 phase or not ... and the amperage .. for each voltage
does it have the 3phase symbol on the label
yes, it says 3ph and the amps, which i dont remember off hand but its a 5hp motor
ground to one leg is 277, correct?
I am just wondering why you keep asking me about rewiring at the panel .. if you have a 480 3phase panel and 3 feed wires at the starter and at the motor .. then that little detail makes me wonder
yes 277 to ground .. single phase
was the previous motor 3phase ?
im replacing an old motor with a different one
i have 3 hots and a ground coming from the 277/480 3 ph panel, if I hook it up according to the diagram on low voltage, it will run on 277volts-correct
if I hook it up according to the diagram on high voltage, it will run on 480 volts-correct?
the voltage of your panel is 277 volt single phase / 480 volt 3 phase ..
so if i wanted to wire lights at 277, i would run 1 hot, 1 neutral and 1 ground--correct
if you hook the motor up to this panel with a 3 pole breaker you are using 480 volt 3 phase ,, and you will hook the motor up as the high voltage diagram shows
yes for the lights .. 277 volt lights
ok, im getting the big picture now.
so this is an equipment and lighting panel ... no 120 volt outlets
I always thought 277 was 3 phase also, but 277 is kinda like 120 but with a lot more kick
you must have a different panel for any 120 volt outlets
no 120 volt outets
correct, i understand that
that makes perfect sense now
thanks for all your help
OK .. like I said before .. i do not know what your knowledge is .. so need to say some of the stupid stuff so I know we are on the same page
s there anything else that you might niot be clear abnout