All electrical equipment, regardless of the voltage, should have a voltage supply that is no more than plus or minus 5 per cent of the equipments stated voltage requirement.
It depends on your definition of efficiency. 480 can certainly push more power than 208 through the same size conductors, but it would not be efficient to wire a motor for 480 when 208 was all that was needed.
A 480 v three-phase system has 480 v between live lines and 277 v from each line to the neutral. This type of supply is common in North America for supplying for example small factories that need more power than a 120/208 v three-phase system can supply.
Current in 200kw at 480 volts = 200,000/480 = 416.667 amps
Across a 480 volt three phase system, 480 volts should appear across L1 and L2, L2 and L3 and L3 and L1.
Dry transformers are used in industrial and commercial sites where the supply voltage three phase and in the range of 480 or 575 volts. The dry core transformer's primary is two legs of the three phase system and the secondary is, in North America, 120/240 volts. The lower voltages are distributed by a load center to power lights and receptacles for offices and small appliances and equipment.
yes
It ranges from about 900F to 860F (about 480°C to 460°C) at the surface.
640 x 480
The 757's cruising speed ranges from 460 to 480 Knots
50.375^480 = 1.1567203912184184319807171792746454876653658310532 x 10^817
1 to the power of 480 is equal to 1. This is because you are multiplying 1x1 480 times. Thus, 1 to the power of ANY number will always be equal to 1.
480
480 joules = 480 watt-seconds20 watts x (time) = 480 watt-secondsDivide each side by 20 watts:Time = 24 seconds
No, you are billed for the energy used so in principle the voltage does not affect the cost. The equipment used is designed for a set voltage and cannot be used on a different voltage. The reason to choose 480 v instead of 208 v would be based on the size of the site, and if there are distances of more than 300 ft involved in the power supply it might be economical to start with a 480 v system. The choices are between 120/208 v and 277/480 v so that using the higher voltage will require the installation of 277 v lighting
with 3 phase lighting you do not have to use as large of wire and can use one neutral for every 3 current carrying conductors so it cut down on material costs ( as voltage increases current decreases) <<>> The voltage 277 is the star-point voltage of a 480 volt three phase system. By using a 480 volt wye system you have the dual ability of running 480 volt three phase equipment along with 277 volt lighting. The side advantage is the ability of using the phase voltage to ground (neutral) 480 / 1.73 = 277 volts for general lighting of the building the 480 volt equipment is located in.
No. The voltage rating needs to be 600 volts for 480 volt power.
1.73*480*22