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
7363 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

There are a Transformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

4 Answers

When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

0 Answers

How are calculated the aluminium busbar cross section area?

2 Answers

what is mutual induction principle?

6 Answers

In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.

0 Answers HAL,

what material is the electrical housing wire made of? is there any difference for the telephone lines?

0 Answers

what is excitor response of an excitor?

1 Answers

Dir sir we have 750 kva Caterpillar dg set we are fas on different problem we start dg set ofter 1 mint apply load around 500a dg was run one or 3 mint after 3 mints dg was shutdown automatic how to face tis problem

3 Answers

what is the function of statics switch in ups and tell me parts

0 Answers Dalkia,

I have 725KVA DG set how to Calculate the Ratio of KWH? Whatb is the Formila

7 Answers HCL,

what is dc voltage?

2 Answers

Why 11KV/440V distribution supply use for Domestic use?

3 Answers Essar, Getco, Nissan,

For more Electrical Engineering Interview Questions Click Here