if we convert Ampers into kva,which one formula use by
us,pls tell me?

Answer Posted / joseph

You can use the basic formula:

VA = [Voltage X 1.732] * Current
or
VA = [Voltage * 1.732] * I

Hence, VA of a 3 Phase system with 1500A Current current at
440V will be:

VA = [440 * 1.732] * 1500
= 1143120 VA or 1143 KVA.

Is This Answer Correct ?    12 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What do you mean by the zone of protection?

615


Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics

1861


1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1476


whit is 33kv power 300*300 cable full current with formula

1389


what is the difference between elcb and rccb ?

1776






How will you define capacitance?

698


What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.

1715


According to IEC60034-14, When the vibration monitoring system required for motor Bearing. above which KW, it is required? and for what type of bearing the vibration probe is provided.

3689


List examples of voltage source?

604


what is the circutor?why we use it ?

1829


Please explain, how to test vector group of tranformer(Delta y1) . Thank

1212


if 12v battery get discharged for 2 months after if we put charge it will charge again?how much time it will take to charge?

1525


Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?

1670


The specific heats of the gas at constant pressure and constant volume are respectively 1.0 kJ/kg K and 0.72 kJ/kg K; the value of R for the gas is

694


During FEED, you will have all the information with regards to cable. How will you calculate the MTO for MV and LV Cables? what are your considerations?

2027