Answer Posted / pillay
1 KVA means 1000 volts amps for single phase calculations
1 KVA means 1000 volts amps x 1.732 for three phase
so for 240v single phase is 1000/240=4.16 A
SO FOR 3 PH @ 415 V= 1000/415/1.732=1.39A
SO FOR 3 PH @ 440 V= 1000/440/1.732= 1.31A
SO for easy average easy calculations you can take 1.35 AMPS
for 1 KVA for 3 p;h calculations
| Is This Answer Correct ? | 30 Yes | 0 No |
Post New Answer View All Answers
A 100W electric lamp is supplied from a 115V, 60HZ source. The peak instantaneous power dissipated in the lamp filament is
For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?
What is the reason behind current flow(20 A) in amain earth cable of an SMDB? Is cuurent flow(45A etc) through a neutral cable acceptable?
What are gain margin and phase margin?
What is the slip speed?
what is the principle of operation of tungstun bulb ??
what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?
What are the characteristics of negative feedback?
what happens if dc supply is given and the remedies for it.
what are the advantages disadvantages of connecting high voltage block( 1:1 transformers) transformers between the turbo generators and busbars.
What is the difference between the impedance percent and impedance voltage ?
What is the actual calculation for transformer short circuit test?.
To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?
Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?
why we used dc supply for field in dg set
