Can 415 volts motor run on 440 volts?

Answer 1

Some motors can be connected to a range of different voltages so it is wise to read the rating plate and the motor's Installation Instructions before you try to connect it to any power supply! If a motor was designed and built to run only on 440 Volts it won't run as it was designed to do on a lower voltage of 220 - 240 Volts.

Its spindle might crawl round rather slowly or the motor might just "hum" a bit, but it certainly won't be able to do the job it was designed to do if can only be connected to the higher voltage.

It has to be said that if you needed to ask this question here -- which is a bit like asking "Can a 120 Volt light bulb run on 60 Volts, or 30 Volts, or 12 Volts?" for which the answer is the same: it may glow a bit, or may not glow at all, but it certainly won't light up as much as it was designed to do -- perhaps you should not be considering installing such a motor yourself?

For your own personal safety, if you are not yet qualified to do this kind of job, call a licensed electrician to install the motor for you. He would use the correct type of breakers on the main supply panel, the correct size of wiring for the length of power cable run that is required and the right type of outlet so that the whole setup is done correctly and safely according to your local wiring codes. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

If you do this work yourself, always turn off the powerat the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicator to insure the circuit is, in fact, de-energized.

Answer 2

Quoted voltages are always 'nominal' values, and are allowed to vary by a percentage specified by the relevant regulations. 415 V used to be the nominal line voltage for three-phase systems in the UK, and this was allowed to vary by +/-6%; so the machine would have been designed to operate for voltages up to 440 V (or as low as 390 V). The same applies to the 440 V supply to which you are referring; as this is not a standard nominal UK voltage, I have no idea what the allowable variation would be for that voltage but, as it's more typical for actual supply voltages to be below, rather than above, their nominal values, it seems likely that the motor should work fine from a 440-V supply. Besides, all machines will have a factor of safety built into them, which means that they can be subject to higher than specified voltage values for limited periods.

Answer 3

yes