How do you calculate 1 phase current to 3 phase current?
In a balanced 3-phase system, if the three loads are star connected, the line current is equal to the load current. If the loads are delta connected, the line current is less than the load current by a factor of 1/sqrt(3).
dnt suck..have a beer
How do you calculate the total input current from a 3-phase power source when the current from each phase is known?
Add them up Answer There is no 'total' current in a three-phase system. The current flowing in each line (not 'phase') is considered separately. And you most definitely don't 'add them up'!
4/4+4*4=20 is it correct by any means or not ? No this garbage has got nothing to do with negative phase sequence current in 3 phase electrical systems.
DC Current divided by 1.225
You can't have a three phase earth fault, you can have a phase to phase or a phase to earth fault. If you want the potential phase to earth fault current it will be your voltage times your impedance. If you want the phase to phase potential fault current then you should just double the above result.
A 7.5 kW three phase load will be balanced by the manufacturer. When connected to a three phase source the line current on each phase will be equal.
IT depends upon the 3-phase connnection ..if it is Y connection:line current = phase current if it is delta connection: IL=(root 3)IPh
Just by using the formula 1.732 x V x I x cos theeta where V the line voltage, I the line current cos theeta the power factor, we can arrive the energy/power
Yes. In a 3-phase motor, all 3 phases have the same current.
It is not practical to do what you are asking with a three-wire system.
How do I calculate the watts used by a service panel using the amps of the three phases do I sum the current and multiply by the voltage or do I average the 3 phases' current x V x 1.73?
Sum the current and multiply by the line to ground voltage. Never use the phase to phase voltage unless you're dealiing with a dedicated load using all three phases like a 3 phase motor.
The 'line' current (not the 'phase' current -they are two different things!) depends on the input power of the machine and the voltage. Since you give no information on the efficiency of the machine (so, we cannot calculate its input power) or its voltage, it is impossible to answer your question.
1) in inductor there is generation of magnetic field due to flow of current . so there is phase difference in voltage and current . 2)in capacitor there is storage of charges. there is phase diff. 3)But in case of resistor there is no such things are happend . it is only a power dissipating element.therefor there is no phase difference between current and voltage.
In a 3 phase, star connected system, the phase to phase voltage and phase to neutral voltage is calculated using root 3. That is, phase to phase voltage is root 3 times phase to neutral voltage. Also to calculate three phase power the voltage and current is multiplied by root 3 to obtain 3 phase power with unity power factor. Answer If you vectorially-add two quantities that are displaced from each other by 120 degrees… Read More
The 3 phase formula you are looking for is I = HP x 746/1.73 x E x% Eff x pf. Where I = amps, E = voltage, %Eff = percent efficiency of the motor and pf = power factor.
when current are same in every phase.
You can do that in one of three ways: 1- current on each phase, 2- phase to gnd voltage, 3- phase to phase voltage, preferably with multiple meters, the three lines has to be balanced within ~ 3%
By dividing the individual phase voltage by its corresponding phase impedance.
One uses single phase AC current (120/240), the other uses 3 phase AC current (most households will not have 3 phase in their home) One uses a 3 phase motor the other a single phase motor. 3 phase is usually used in industrial applications while single phase is used in home or small business apps.
To answer this question the voltage of the three phase motor must be given.
find the line current first... i=(150*735.5) / (sqrt(3)*600*0.8) assume pf of 0.8 the current value gines u reqd fuse rating
The current is based on the load amperage rating. This is true regardless of single or three phase or voltages.
When you have 56KVA available in 3 phase supply how much is your available current in 3 phase and how much in 1 phase?
In three phase: I = (three phase VA) / (sqrt(3) x (phase to phase voltage)) for single phase: I = (single phase VA) / ((phase to neutral voltage)) keep in mine three phase VA = 3 x (single phase VA), and phase to phase voltage = 1.732 x (phase to neutral voltage) Therefore the single phase and three phase currents are the same (ie, the three phase currents are the same in all three phases… Read More
There is no such thing as 3 phase to a DC motor. DC is direct current and is totally different from AC. 3 phase only exists in AC or Alternating Current
Usually when a rate of current is stated on a 3 phase board it means per phase. Therefore, you woiuld be able to draw up to 200A per phase, providing the supply authorities incomer permits this. It should be noted that, it is better to balance the phases with each other as far as the loading current goes, this will keep your max demand lower and your bills down.
If 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.
All current is the passage of electric charges from one terminal to another through a conductor so there is no real difference in the type of current that flows in a 3 phase system compared to a single phase system.
KVA means product of voltage and current. For 3 phase generator, its KVA = (1.732 X (Line Voltage) X Current)/1000. Put line voltage in this equation and get current.
The current is the same in the three live wires. The voltage can be described as the line voltage (phase to neutral) or the phase voltage (phase to phase) which is larger by a factor of sqrt(3). So a line voltage of 230 v corresponds to a phase voltage of 400 v.
If I have 1 KW In 3 Phase it will give 1.54 A and In single phase it will give 4.6 A For cosF 0.9 V 415 3 ph V 240 1 ph It 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. Answer It really depends on the load. Are you assumining the three-phase load to be the… Read More
3-phase 400 v is 230 v single phase. That is a 3-phase 4-wire system, with three live wires and a neutral. The 400v is between any two live wires, while there is 230 v from any live wire to neutral. With equal current drawn from each of the three phases, the system is balanced and there is no current (and no power loss) in the neutral.
A 3 phase energy meter comprises of 3 phases and 1 neutral conductor. Its calibration include each measurement done on 3 current sensors and 3 voltage sensors.
The phase voltages (i.e. line-to-neutral in a 4-wire system, or line-to-line in a 3-wire system) of a three-phase system are displaced from each other by 120 electrical degrees. Each phase voltage, in fact, is rarely in phase with its phase current, as the phase-angle (the angle by which a phase current lags or leads its phase voltage) is determined by the load not by the supply. In general, most loads are resistive-inductive so the phase… Read More
A neutral wire is used to carry the returning current from electrical equipment back to the source of supply. In a 3 phase system the sine waves on each phase are shifted 120 degrees. So for a balanced 3 phase load, such as a motor, the current to the motor is carried by two phases and the returning current by the other phase.
Try 746 watts = 1 HP
'Line currents' are those currents flowing in the line conductors, whereas 'phase currents' are those currents flowing in the phases. Each line current is the phasor sum of the phase currents at the junction between a line and two phases. For a balanced load, the line current is 1.732 times the phase current.
Yes, because you will be able to maintain current flow between phases.
Q = 3 Vph Iph sin(phase angle) = 31/2 Vline Iline sin(phase angle)
600 volts between any two wires. The phase has nothing to do with voltages, only current relationship.
There is no such thing as a 'total current' for a three-phase generator in the sense that you suggest -i.e. the sum of the phase currents. Current ratings are based the current that the machine can deliver to a load on a 'per line' basis.
Power in a 3 phase circuit is given by W=√3*V*I*cosφ therefore transposing the formula gives: I=W/√3*V*cosφ where I=current in amps, W=power in watts, V=line voltage, cosφ=power factor (this should be on the motor plate, if not you could use 0.9) Regards ninenix
You simply add the power of each phase together to determine the total power.
Watt loss or power loss is given by I x I xR x 3, where I line current, R is line resistance per line
3 phase cable is transposed to minimize the effect of leakage/capacitance current.
The formula for single phase from a three phase system is Kilowatts = I x E x pf/1000. For a three phase system it would be Kilowatts = I x E x 1.73 x pf/1000.
Very unlikely. Its 3 phase for a reason, it needs a large voltage/current to power it, single phase won't provide that.
For a three-phase, four-wire, system the neutral current is the phasor (vector) sum of the three line currents.
first u have to calculate or find out your laod, let your load will be 200 amps, then your ct ratio will be 200:5. Mind it energy meter take full laod current 5 amps.
6 times the full load current
From its nameplate data.