In power generator sets, when they are coverted from 50hz to 60hz, the kva rat

In power generator sets, when they are coverted from 50hz
to 60hz, the kva rating after conversion increases. For
example, the manufacturer of a perkins 200kva @ 50Hz
generator set has mentioned it to become 220kva after
converstion to 60hz. What is the relation between the
frequency & the KVA rating. Any formula please.

Question Posted / fazal ur rehman

3 Answers
7437 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion..

Answer / guest

Increased freq will increase EMF generated which in turn
will increase KVA rating.

Is This Answer Correct ?

4 Yes

1 No

In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion..

Answer / senthil nathan

If they increase frequency of the supply means perfomence
of the load will increased. number of cycles per second is
increased. that mean speed of the motor (load) is increased.

Is This Answer Correct ?

2 Yes

1 No

In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion..

Answer / kj

The main reason for the increase in the kva is that the
diesel engine produces more HP at 1800 rpm than at 1500 rpm.
This allows a higher kw output. The alternator can also
handle the higher current and therefore the kva is
increased. Note that the rated power factor stays the same.
This is because the amount of cooling air is increased at
the higher speed.
The increase in the EMF per turn allows a higher voltage to
be generated but this is reduced by the AVR reducing the
excitation. This has no effect on the kva capacity of the
generator set.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

how we calculate electrical load on a building according to area?

0 Answers HFCL,

WHAT IS THE SHOPE TESTING

2 Answers TATA,

How is operate breaker failure scheme in substation

0 Answers

What is the difference between the impedance percent and impedance voltage ?

0 Answers

Why HT motors are connected in star.

7 Answers GIL,

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

0 Answers

IN OLTC we observed "OUT OF STEP" Alarm, we have two different transformer, when both are in parallel this type of alarm observed. what's the meaning of this alarm and why it occurs???

3 Answers

why odd hormonics only will effect the power system.why not even hormonics

2 Answers

how to protect motor in dol starter having capacity of 30 hp.40 hp?

0 Answers

what are the standard values for resistances(Megger testing) between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?

1 Answers CESU,

Is it acceptable of installing an earth pit in planters area where bare copper cable, earth rod and connection are susceptible to corrosion due to water?

0 Answers

What is load curve?

2 Answers

For more Electrical Engineering Interview Questions Click Here