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Is 3 phase power equal to 3 times the single phase power?
MahabaleshwaraBl
Single phase has two line voltage wires, separate from each other; three phase power has three line voltage wires, actually saving more energy and thus money.
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The difference is that the power is transmitted divided into 3 parallel lines with the wave forms 120º apart. Energy saving is achieved by using very high transmission voltages hence low currents, feeding step-down Transformers in the users' locality.
Wiki User
∙ 8y ago
Wiki User
∙ 12y agoNo, it is 1.73 times more than single phase.
Single phase formula, kW = I x E x pf/1000
Three phase formula, kW = I x E x 1.73 x pf/1000
Further AnswerThe power 'supplied' by any system is dependent upon the load, not the supply or the configuration of the supply. So the simple answer is that 'it depends' entirely on the load. However, the load capacity of a three-phase system is greater than that of single-phase supply providing the same load current.Wiki User
∙ 12y agoThe horse power rating at 3 phase or single phase is alike ,what will change
is the frame type,that include the service facto.
AnswerThe output power of a motor is determined by the power of the load that it has to drive. So, if you want to replace a 5 horsepower three-phase motor with a single-phase motor, then the single-phase motor must also be 5 horsepower.Wiki User
∙ 12y agoTo show the difference in kWs a 10 HP motor will be used.
The single phase current for a 10 HP motor is listed as 50 amps at 230 volts. The formula for kWs single phase is I x E x pf/1000 = 50 x 230 x .9/1000 = 10350/1000 = 10.35 kw.
The three phase current for a 10 HP motor is listed as 28 amps at 230 volts. The formula for kWs three phase is I x E x 1.73 x pf/1000 = 28 x 230 x 1.73 x .9/1000 = 10027/1000 = 10.02 kWs.
Wiki User
∙ 12y agoYes. You have three hot conductors as opposed to one. Size for size, that translates to three times the current. Since three phase power is generally of a higher voltage than one phase power, then power is even higher, typically six times, comparing one phase 240 against three phase 480.
AnswerAssuming that the three-phase system and the single-phase systems have line conductors with the same cross-sectional area, then a three-phase system has the capacity to provide more power than the single-phase system.
For a balanced three-phase load, the equation for power is given by:
P = 1.732 x VL IL x power factor
Assuming a single-phase load is connected across two line conductors of a three-phase supply, then the equation becomes:
P =VL IL x power factor
So, as you can see, the power supplied by a three-phase system to a balanced load, is 1.732 times that of a corresponding single-phase system.
Wiki User
∙ 12y agoIn general yes. For a given physical size of motor 3 phase will be more powerful than single phase. Generally they provide more starting torgue, that is will come up to full speed under load more quickly and are less likely to stall. A common reason for chosing 3-phase motors is that since the current is spread over 3 conductors out-of-phase the wiring to them can be thinner - i.e. cheaper, though the motors and switchgear are more expensive.
Wiki User
∙ 11y agoNo. Three phase motors do not consume more energy than single phase motors.
AnswerThe energy consumed by any type of motor depends on its power and efficiency. If the power is the same, then the energy consumed is roughly the same -regardless of whether it is a.c. or d.c., single-phase or three-phase. The reason I say 'roughly the same', is because for a given output power (power ratings are always output power), some motors are more efficient than others, so their input power (and, hence, energy consumed) will vary. But efficiency can very between machines of the same type, as well as for different types of machine.
Wiki User
∙ 11y agoIf you have the same phase voltage the power is three times as much for a 3-phase system carrying the same current, but that power can be carried with less wire, ideally only 1½ times as much wire for the 3-phase system. So 3-phase transmits power more efficiently.
Wiki User
∙ 14y agoHorse power is the same regardless of phase
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Why is the amperage in single phase double than of 3 phase?
If I have 1 KW In 3 Phase it will give 1.54 A and In single phase it will give 4.6 AFor cosF 0.9V 415 3 phV 240 1 phIt seems the reason is because the current is carried on more wires. Also, remember that if wattage stays constant, then as voltage increases, current decreases.AnswerIt really depends on the load. Are you assumining the three-phase load to be the same as the single-phase load or, as it is likely to be in practice, three times the value of the single-phase load?But, in either case, the single-phase current will not be double the the three-phase (line) current!The equation for the load current supplying a single-phase is: I = P / (E x power factor)The equation for the line current supplying a balanced three-phase system is: IL = P / (1.732 x E x power factor)If you insert real figures into these equations, (240 V for the single-phase voltage and 415 V for the three-phase line voltage) then you will find that, when the three-phase load is threetimes that of the single-phase load, the supply currents will be exactly the same. On the other hand, if you assume that the three-phase load is exactly the same as the single-phase load, then you will find that the three-phase line current will be one-third that of the single-phase current.
How many kva 22.5kw?
The real power in kilowatts (kW) is equal to the apparent power in kilovolt-amps (kVA), times the power factor PF. The equation to use, for converting kW from kVA is, kW = kVA × PF. Using this equation the power factor needs to be known. If it is not known then use .8 and this will give you results close enough. kW = 2 x .8 = 1.6 kW or 1600 watts.
How to compute watts to amps single phase?
In a single-phase system, power (expressed in watts) is generally called 'true power' or 'active power', and is the product of the supply voltage, load current, and load power factor.
How do you connect 480 vac three phase power to a 480 vac single phase transformer?
If the primary and the secondary windings of the three phase transformer are connected in delta, you cannot get a healthy neutral from it but why bother? You simply drive a rod into earth and use it as a neutral. Alternatively either the primary or the secondary windings must be connected as star and you use the common point as neutral.
Does voltage divided by watts equal the current?
Electric power is not defined as current divided by voltage. Electric power (Watts) is equal to amps times voltage
How many times does current equal zero in single phase in one hour?
At 50Hz it's 50x60x60 = 180000
How much a 3 ampere motor 220 v single phase is equal in kw?
As watts are made of volts times amps, the answer would be 0.660kw.
Why is 3 phase more efficient?
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.
What are the advantages of three phase circuits over single phase circuits?
3-phase is used to transmit power over distance because less wire is needed for a given amount of power. 3-phase induction motors produce a steady torque and don't need a starting coil to make them start rotating the right way.
Why is the amperage in single phase double than of 3 phase?
If I have 1 KW In 3 Phase it will give 1.54 A and In single phase it will give 4.6 AFor cosF 0.9V 415 3 phV 240 1 phIt seems the reason is because the current is carried on more wires. Also, remember that if wattage stays constant, then as voltage increases, current decreases.AnswerIt really depends on the load. Are you assumining the three-phase load to be the same as the single-phase load or, as it is likely to be in practice, three times the value of the single-phase load?But, in either case, the single-phase current will not be double the the three-phase (line) current!The equation for the load current supplying a single-phase is: I = P / (E x power factor)The equation for the line current supplying a balanced three-phase system is: IL = P / (1.732 x E x power factor)If you insert real figures into these equations, (240 V for the single-phase voltage and 415 V for the three-phase line voltage) then you will find that, when the three-phase load is threetimes that of the single-phase load, the supply currents will be exactly the same. On the other hand, if you assume that the three-phase load is exactly the same as the single-phase load, then you will find that the three-phase line current will be one-third that of the single-phase current.
What is the electrical engineering 3 phase?
The electrical engineering 3 phase is calculated by mathematics. The total active power is equivalent to three times the power of an individual phase.
What is the amperege of single phase and 3 phase 1kW motor operating at 230 volts single phase and 415 Volts 3 phase?
To answer your question properly, you need to know the input power to these machines, whereas you are specifying their output powers. In other words, you really need to know their efficiencies in order to determine their input powers.Once you have figured out their input powers, then you need to divide the power by the supply voltage in the case of the single-phase motor, and the power divided by 1.732 times the supply voltage in the case of the three-phase motor.Incidentally, your motors' specs should either be 230/400 V or 240/415 V, NOT 230/415 V.
What voltage should be used when making three phase calculations?
With a three-phase system the voltage quoted is the line-to-line voltage between any two live lines. To find the line-to-neutral voltage divide by 1.732 which is sqrt(3). The power supplied from each phase is the current times the line-to-neutral voltage (times the power factor if less than 1). To find the total power when the currents are equal, multiply by 3.
Three phase voltage in india?
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.
What is the formula to calculate ac current in single phase 240volts?
The formula is: current (in amps) = power (in watts) , divided by (240 times the power factor). The power factor is 1 for incandescent light or heaters, otherwise it can be assumed to be 0.75 for other loads.
How does single phase alternator differ form a dc ganerator?
Single phase alters from positive to negative at 50 (50hz) or 60 (60hz) times per minute. While in dc it does not vary but stays at a constant positive phase.
What is equal to voltage times current?
Power, in 'watts'.
