Watt - unit of electrical energy or power - one watt is the product of one ampere and one volt - one ampere of current flowing under the force of one volt gives one watt of energy
Volt-ampere (VA) - is a measurement of power in a direct current ( DC ) electrical circuit. The VA specification is also used in alternating current ( AC ) circuits, but it is less precise in this application, because it represents apparent power , which often differs from true power .
Kilovolt Ampere - one kilovolt ampere - KVA - is equal to 1000 volt amperes
Power Factor - ratio of watts to volt amperes
Most important Formulas:
Power P = V × I = R × I2 = V2 / R in watts W
Electrical Potential - Ohm's Law
Ohm's law can be expressed as:
V = R I (1a)
V = P / I (1b)
V = (P R)1/2 (1c)
Electric Current - Ohm's Law
I = V / R (2a)
I = P / V (2b)
I = (P / R)1/2 (2c)
Electric Resistance - Ohm's Law
R = V / I (3a)
R = V2/ P (3b)
R = P / I2 (3c)
Electric Power
P = V I (4a)
P = R I2 (4b)
P = V2/ R (4c)
where
P = power (watts, W), V = voltage (volts, V)
I = current (amperes, A), R = resistance (ohms, Ω)
Electric Energy :Electric energy is power multiplied time, or
W = P t (5)
where
W = energy (Ws, J), t = time (s)
Electrical Motors : Electrical Motor Efficiency
μ = 746 Php / Pinput_w (6)
where
μ = efficiency
Php = output horsepower (hp)
Pinput_w = input electrical power (watts)
or alternatively
μ = 746 Php / (1.732 V I PF) (6b)
Electrical Motor - Power
P3-phase = (V I PF 1.732) / 1,000 (7)
where
P3-phase = electrical power 3-phase motor (kW)
PF = power factor electrical motor
Electrical Motor - Amps
I3-phase = (746 Php) / (1.732 V μ PF) (7)
where
I3-phase = electrical current 3-phase motor (amps)
PF = power factor electrical motor
Electrical measurements
Source: https://byjus.com/electrical-formulas
http://whatis.techtarget.com/definition/volt-ampere-VA
http://doolox.com/g/0507_004/
Not indicating that the content you copy/paste is not your original work could be seen as plagiarism.
Some tips to share content and add value:
Repeated plagiarized posts are considered spam. Spam is discouraged by the community, and may result in action from the cheetah bot.
Creative Commons: If you are posting content under a Creative Commons license, please attribute and link according to the specific license. If you are posting content under CC0 or Public Domain please consider noting that at the end of your post.
If you are actually the original author, please do reply to let us know!
Thank You!
i m not copy pesting
ok?
you are realy hurt me plz baan my id not working hare agine
👍👍👍👍
thank you boss love u
👌
thank you
long post but thanks your post.
thank you vaiya love you
Nice 👍
thank you madam
hi
hi sir thanks for comment me
I love electrical job
i love also thanks for support me