Mathematically, just divide 480 by the square root of three.
Electrically, 480V refers to the line-to-line value of a three phase system. For example, measure the voltage across A-phase and B-phase and you'll get 480V. 277V is the line-to-neutral value. Measure the voltage across A-phase and the neutral conductor and you should get 277V.
3 phase 480V is three phases of 277V in other words if you have a 480V three phase panel each single breaker is a 277V feed if this doesn't answer your question ask it in a little more detail
You can either have an electrician modify the electronics inside (sometimes not possible) or use an external step-down transformer to convert the voltage (not designed for permanent use).Another Perspective:It all depends on the type of appliance. An appliance that uses a lot of resistance current might be a little expensive to convert. If it's a simple appliance you can easily change some motors from 240 to 120 by changing the wiring, and often controls are already running on one leg of a 240 V supply. But the transformer idea is not necessarily a good idea. It might be cheaper to simply have an electrician run a 240 V line for the appliance.
One of the disadvantages of the 3 phase induction motor is that it requires a three wire supply. The other disadvantage is that the 3 phase induction motors have poor starting torque and high have in the rush currents.
On a Delta 3-phase you connect the single phase loads between pairs of the 3-phases. Warning both sides of these loads will be hot! You may want to use 3 isolation transformers so that the real loads have a neutral line.On Y 3-phase you connect the single phase loads between one of the 3-phases and neutral.In each case to balance the loads, try to put similar loads on each phase (or pair of phases).
It is 230V single phase and 440V in 3 phase system at 50 Hz.AnswerIf the single-phase voltage is 230 V, then the three-phase voltage must be 400 V, not 440 V. The line voltage is 1.732 times the phase voltage.
In a 3 phase power system, say for a 3 phase motor - it is necessary to have all three phases intact to be able to run the motor efficiently, safely. If any one phase fails , the motor still continues to run but the temperature raises rapidly, due to high current. The motor winding can burn out, can trip off due to overload. Hence a device called phase failure relay is connected. It constantly reads all the 3 phases and cuts off the main supply in case any one phase fails.
Not advisable, the voltage differential is too great.
5 kva
You can buy a converter.
380V ÷ √3 = 219.4
380V
220/380V
10amp
f your supply is a Y connected transformer (4 wires COM) with a phase to phase voltage of 380 volts (voltage between any two of the hot wires) , utilizing a true Y connection to your load (connections of one hot lead and neutral for each phase to your load will give a voltage of 380 รท sqrt 3 = 380 รท 1.732 = 220 volts.
50 Amps Single Phase 20 Amps Three Phase
304 Amperes
First of all, your power source must be 3-phase if you want to run the motor, then you need a step-down 3-phase transformer to give 220v 3-phase output.