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## Can 415v motor run on 400V supply?

If you connect a 400V motor to a 600V supply it will not fail instantly, and will probably be quite satisfactory until such time as it gets overloaded, then it will get far too hot! The magnetising current will however be higher than expected (the no load current), but not extreme.

## Can 380V motor run on 400V supply?

RE: Operating 380V equipment on 400V supply You can use a 380V equipment on a 400V system with confidence. Take note it’s just a little over 5% of the voltage and most motor should be happy with that.

Why we use 690v motors?

With respect to cable “ampacity”, the use of 690 V motors, involving a lower load currents than 400 V, makes possible to reduce both cable conductor cross section (keeping the same voltage drop in both cases) and cable power losses.

Where is 690 VAC used?

690 volt 3 phase supplies are used in the oil industry, not just offshore but also in oil refineries. An electric motor with 3 windings each designed for 400 volts may be used in delta on 400 volts or in star on 690 volts. The voltage on each winding is identical and so should be the performance.

### Is 3 phase 400V or 415V?

For three-phase supplies the voltage was 415 V +/- 6%, the spread being from 390 V to 440V. Most continental voltage levels have been 220/380V. All are based on the 240/415V supply voltages which have applied for many years and will continue so to do.

### Can a 440v motor run on 380V?

Can a 460V motor run on 380V? As long as the load torque does not change between the two speeds (60Hz/50Hz), the motor will draw the same current at both speeds, and no harm will come to the motor.

Can you run a 380V motor on 480V?

The drive will accept 380V, no problem. But the output voltage will be limited by that as well, standard VFDs cannot provide an output voltage that is greater than the input voltage. So if your motor is designed for 480V, you will end up with a limited speed or a loss of torque.

What is the range for medium voltage?

1000 V to 35 kV
Keeping the limits in check The limits are clearly defined, however, in the IEC 60038 standard: low voltage is up to 1000 V, medium voltage is from 1000 V to 35 kV, and high voltage is over 35 kV.

## Why is 415V 3 phase?

3 phase power has four wires; three actives and one neutral, and supplies power at both 240V and 415V. When we bring 3 phase supply into a home it triples the amount of power available. This is because we have access to all 3 phases, so essentially this means we have 3 x single phase supplies connected.

## Can I use a 380V motor on 460V?

A three phase 460V motor operating at 60 Hertz has the same V/Hz ratio as a 380V motor operating at 50 Hertz – approximately 7.6V/Hz. As long as the load torque does not change between the two speeds (60Hz/50Hz), the motor will draw the same current at both speeds, and no harm will come to the motor.

How can 400V and 690V on E-motors result in?

On a 400 V phase-to-phase supply the motor windings are connected in delta (from the Greek ‘D’ or Δ). On a 690 V phase-to-phase supply the motor windings are connected in star or wye (from the American letter ‘Y’). From trigonometry you can show that the orange lines in Figure 1b are \\$\\sqrt 3 \\$times the length of the black lines.

Can a 400 volt Crane be connected to a 690 volt motor?

An electric motor with 3 windings each designed for 400 volts may be used in delta on 400 volts or in star on 690 volts. The voltage on each winding is identical and so should be the performance. Despite this I would be very doubtful about commissioning a 690 volt crane on a 400 volt supply by altering the motor connections.

### Is the motor 690V or 440V star connected?

The motor is 690V star connected and is started DOL, if the connection is changed to 440V delta connected is this likely to cause current/torque issues? From the voltage, it is sounding possibly American. Is the motor designed for 50Hz or 60Hz, and does this match your supply?

### How can 400V and 690V result in three phase?

On a 690 V phase-to-phase supply the motor windings are connected in star or wye (from the American letter ‘Y’). From trigonometry you can show that the orange lines in Figure 1b are \\$\\sqrt 3 \\$times the length of the black lines. \\$400 imes \\sqrt 3 = 692.8 \\$.