Yes that is why most factories or business that use motors, utilize 3 phase service. There also is much less current draw relating to expense in electricity rates.
As a general rule, 3 phase devices use less electricity relating to current usage.
Very, especially if your facility is in a residential area--they're not allowed to put three-phase power in a residence. (They're afraid that if you have three-phase power in your house you'll go out and buy a huge welder or something.)
CommentIn some countries, three-phase residential supplies are common.
One example is single phase requires two wires - the power, and a return path / neutral. Three phase can provide 3 x the current, and requires at most 4 wires (three phase and a neutral). So you get 3 x the power for 1/2 the wire.
AnswerThe answer to your question is far more complicated than the answer supplied above, but it comes really down to this: for any given load, a three-phase system uses approximately 75% of the volume of copper needed by a single-phase system.
three phase is not anymore economical then two phase. the reason 3 phase is used in highrise buildings is because of all the apparpements which use up more circuts that can't all plain fit on 2 phases. also alot of new elevator motors ,along with some other equipment run on 3 phase..Tom Wade...
For residential, generally not. If you have lots of (continuous) motor load, switching to three phase may be cheaper in the long run. You're probably billed on power usage, so using higher efficiency equipment (such as three phase motors vs. single phase) will use less energy to accomplish the same thing. Spending several thousand on new three phase motors to save 50 cents/month on a utility bill is not a good investment (which would be the case for most residential customers).
It depends. You will have three times as many rectifiers, but the filter capacitor can be much smaller, and the headroom for the regulator will be smaller, allowing it to dissipate less power. Gut feeling, however, is that a three phase supply will be more expensive, because there will also be more connections, more protective fuses, etc.
yes power cost is figured by watts volts times amps equals watts three phase motors have lower amp draws per hp than single phase thus less watts less cost
A three-phase motor will not start if one or two phases aren't connected. If while running one or two phases "drop out", it will continue to run for awhile, but will eventually burn out, unless connected to a motor saver.
There are a few reasons. In my opinion the most common is cost. In an industrial setting, three phase power is used to power motor loads. A three phase induction motor is more efficient than a single/split phase motor. They also have higher starting torque. A three phase load will also typically have a lower amp rating for the same size load as single phase. This saves money because you can use smaller wire.
No, you cannot get a three phase supply directly from a single phase supply. Nowadays electronic inverter units can be bought that will do the job. For very low power loads the cost of such invertors is quite reasonable but for high power loads they are very expensive. For high-power industrial uses the most economical solution is to have a 3-phase service installed by the local electric power utility company.
A phase converter converts single-phase, alternating current power to three-phase power. There are two general types, static converters and rotary phase converters. A basic form of rotary phase converter is a single-phase electrical motor with its shaft coupled to a three-phase alternator. A static phase converter converts single-phase power to three-phase power by using electronic switching. They typically convert the single-phase, alternating current to direct current and then electronically synthesize three phase power output for use with three-phase equipment.
Two wattmeter method is used in a three phase sysstem to measure the true power without regard to the balance ie. It can be used to measure both balanced loads and unbalanced loads.The three phase power could be measured using single phase wattmeters in each loads of the system. But using three wattmeters is quite unnecessary as we can measure it by using only two wattmeters.The three phase power could be measued by using single phase wattmeters , haing a current coil in one line and a potential coil connected between the line and some arbitrary common junction point. If that arbitrary common point is chosen on one of the three lines, then the wattmeter connected to that line will indicate zero power because it's potential coil has no voltage across it. hence, that wattmeter may be eliminated, and the three phase power can be determined by means of only two single phase wattmeters.
If using L-L voltages, the three phase power = V*I*sqrt(3)If using L-N voltages, the single phase power = V*ITo convert single phase to three phase, multiply by 3.
You cannot obtain a three-phase supply from a single-phase system without using some sort of rotary converter.
Simple hookups to devices you wish to power (2 wires and ground). Most household common devices use single phase.
load is balanced
A 3-phase meter measures the sum of the power in the three phases, so if power is drawn on one phase only it will still be correctly measured.
A three-phase motor will not start if one or two phases aren't connected. If while running one or two phases "drop out", it will continue to run for awhile, but will eventually burn out, unless connected to a motor saver.
There are a few reasons. In my opinion the most common is cost. In an industrial setting, three phase power is used to power motor loads. A three phase induction motor is more efficient than a single/split phase motor. They also have higher starting torque. A three phase load will also typically have a lower amp rating for the same size load as single phase. This saves money because you can use smaller wire.
No, you cannot get a three phase supply directly from a single phase supply. Nowadays electronic inverter units can be bought that will do the job. For very low power loads the cost of such invertors is quite reasonable but for high power loads they are very expensive. For high-power industrial uses the most economical solution is to have a 3-phase service installed by the local electric power utility company.
A phase converter converts single-phase, alternating current power to three-phase power. There are two general types, static converters and rotary phase converters. A basic form of rotary phase converter is a single-phase electrical motor with its shaft coupled to a three-phase alternator. A static phase converter converts single-phase power to three-phase power by using electronic switching. They typically convert the single-phase, alternating current to direct current and then electronically synthesize three phase power output for use with three-phase equipment.
yes we can by using one phase and neutral line
Use a transformer. A 208-240v single phase line has 2 power leads. Consult your local electrician for help! 440v systems are not for toying with when questions like this are asked.
Two wattmeter method is used in a three phase sysstem to measure the true power without regard to the balance ie. It can be used to measure both balanced loads and unbalanced loads.The three phase power could be measured using single phase wattmeters in each loads of the system. But using three wattmeters is quite unnecessary as we can measure it by using only two wattmeters.The three phase power could be measued by using single phase wattmeters , haing a current coil in one line and a potential coil connected between the line and some arbitrary common junction point. If that arbitrary common point is chosen on one of the three lines, then the wattmeter connected to that line will indicate zero power because it's potential coil has no voltage across it. hence, that wattmeter may be eliminated, and the three phase power can be determined by means of only two single phase wattmeters.