I was wondering if anyone could advise on cause and effect to a 480v water pump motor(induction) which supply voltage has been changed from 480v to 415v. Is it just that it will draw proportionately higher current?
The electricity network on the street has recently been upgraded from split phase (single phase transformer which converts 22kv [taken from 2 hv phases] primary to 2x 240v windings on the secondary, neutral being the middle tap to give either 240v 2 wire supply or 480v 3 wire) to 3 phase.
Also are these 480v pumps polarity specific ie if the rotation was changed on the street when it was upgraded from 2 hv cables to 3 would that change the direction of the motor, as if the 2 actives feeding the motor where switched around.
Thanks for any help.
The electricity network on the street has recently been upgraded from split phase (single phase transformer which converts 22kv [taken from 2 hv phases] primary to 2x 240v windings on the secondary, neutral being the middle tap to give either 240v 2 wire supply or 480v 3 wire) to 3 phase.
Also are these 480v pumps polarity specific ie if the rotation was changed on the street when it was upgraded from 2 hv cables to 3 would that change the direction of the motor, as if the 2 actives feeding the motor where switched around.
Thanks for any help.