What is current equation formula?
The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).
What is the phase of a current?
Phase current is the current through any one component comprising a three-phase source or load. In balanced “Y” circuits, the line voltage is equal to phase voltage times the square root of 3, while the line current is equal to phase current.
What is the meaning of 3 phase current?
Three-phase power is a three-wire ac power circuit with each phase ac signal 120 electrical degrees apart. Residential homes are usually served by a single-phase power supply, while commercial and industrial facilities usually use a three-phase supply.
How do you calculate current in single phase?
Amps calculation with line to line voltage
- I(A) = P(W) / (√3 × PF × VL-L(V) ) So amps are equal to watts divided by square root of 3 times power factor times volts.
- amps = watts / (√3 × PF × volts) or.
- A = W / (√3 × PF × V) Example.
- I = 330W / (√3 × 0.8 × 110V) = 2.165A. Amps calculation with line to neutral voltage.
What is a phase in physics?
Phase Definition In Physics, the phase is defined as the position of a point in time on a cycle of a waveform. A complete cycle that is 360 degrees is defined as the phase. The phase is expressed in terms of radians. One radian of phase is 57.3 degrees approximately.
How to calculate the phase of a current?
Phase current I (A) is the single phase apparent power divided by the phase to neutral voltage (and given VLN = VLL / √3): I = S 1 p h V L N = P 3 × p f 3 V L L Simplifying (and with 3 = √3 x √3): I = P 3 × p f × V L L
How does the three phase power equation work?
The most important three-phase power equations relate power ( P , in watts) to current ( I , in amps), and depend on the voltage ( V ). There is also a “power factor” ( pf ) in the equation that takes account for the difference between the real power (which performs useful work) and the apparent power (which is supplied to the circuit).
What is the phase relationship in an AC circuit?
Phase Relationships in AC Circuits. Phase. When capacitorsor inductorsare involved in an AC circuit, the current and voltage do not peak at the same time. The fraction of a period difference between the peaks expressed in degrees is said to be the phase difference. The phase difference is = 90 degrees.
How do you find the power of a current?
To find the power given current, multiply by the voltage and then the power factor to convert to W. For a three phase system multiply by three to get the total power. Personal note on the method. As a rule I remember the method (not formulae) and rework it every time I do the calculation.