using 220VAC for motor local control panel
using 220VAC for motor local control panel
(OP)
we specified the use of 220VAC for motors loacal control panel which will contain mainly start/stop push bottoms.
some of the motors will be 225 meter away from MCC, we are using 2.5mm2 cable(#14 AWG)three conductor cable for that.
my question is: due to the long distance is it possible that the cable will act as a capacitor and then we will be unable to stop the motor because of the capacitive effect of the cable which will keep the contactor coil energized?
and if we use 110VDC is this will be better?
some of the motors will be 225 meter away from MCC, we are using 2.5mm2 cable(#14 AWG)three conductor cable for that.
my question is: due to the long distance is it possible that the cable will act as a capacitor and then we will be unable to stop the motor because of the capacitive effect of the cable which will keep the contactor coil energized?
and if we use 110VDC is this will be better?






RE: using 220VAC for motor local control panel
I have a very old data sheet showing that for a #12 AWG three-wire control circuit in wet conditions at 240V (60Hz), the maximum control distance is 115 feet. For two-wire control it gives a maximum of 230 feet.
I'm guessing your system is 50 Hz, so distances will be somewhat greater.
This would not be a problem with any dc control power voltage.