there is a # KVA Transformer of 11 KV/440V, in simple(not use formuia) how can you calculate it's HT & LT side current.

Answer Posted / sunit

this is simple .. assume a 100kva tr, ok
then p= vi ( power = voltage x current)

1.lets see for HT side

p( kva)= root 3 ( for 3 phase)x voltagex current
=> kva = root3xvxI
=> 100kva=1.732x11kvxI
=> I= 5.25amp/phase

2. similarly in secondary side means LT side

=> 100kva=1.732x440xI
=> I= 144amp/phase

Is This Answer Correct ?    8 Yes 6 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Please define ampere?

666


What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?

1197


What is marx circuit?

641


what are the sample questions asking to the test cunducting for electrical superwising lisence test?

1649


how many load we can take for lighting

1743






Define peak overshoot.

783


can we find the inductance of a induction motor?

1537


what is meant by k-rating in isolation transformer?what is k9, k14 stands for?

2233


Pl.brief me about Electrical power distribution system from Main generating station to Industry.What is the use of in between station.

1580


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.

1473


what is meant by moulded case circuit breaker ?

1694


Why i receive the GCU fault in my DG Sychronization panel . what all the factors considered for this fault .

1717


how 650 volts creates? where is use?

1729


Ac generato how produce power I need for camplet defination

1162


explain the functions of main isolation switches

1185