60 kW Motor genset size?

i want to start and run the motor with genset, the motor is of 60kw, 104ampere,415 voltage , 3 phase direct on line, so please send me the calculation to select the genset.
asked 12/26/2011

1 Answer

You need to ensure the generator is adequate for the normal power load of the motor, starting load and that there is no excessive voltage drop during running or starting.

I just did a quick Google search and one site was recommending 100 kW (star delta starting) and 225 kW (for direct on line). Another site gave a rule of thumb of 1 kW of generator for each 0.56 to 0.75 kW of motor (80 to 107 kW for a 60 kW motor). Quite a bit of a range here.

Possibly the better way is to calculate the running kW, running kVA, staring kW and starting kVA. Compare these to figures given by the generator manufacturer on their datasheets to select the correct generator. The generator manufacturer can also probably provide some good input on the correct size to use.

Should also be careful about voltage drop. In addition to not stalling the motor, you will want to ensure that any generator control equipment connected to the same bus is not affected.
answered 1/22/2012 Steven McFadyen 246
Steven McFadyen

Your Answer

In order to provide an answer to this question, you must Login

I am flagging this question because...

10 inform moderator flags remaining

I am deleting this question because...

I am flagging this answer because...

10 inform moderator flags remaining

Flagging a Post

You have already flagged this post. Clicking "Remove Flag" below will remove your flag, thus reducing the count by one as well.

I am deleting this answer because...

Introduction to Cathodic Protection

If two dissimilar metals are touching and an external conducting path exists, corrosion of one the metals can take place.  Moisture or other materials...

IEC 61439 Verification Methods

The (relatively new) switchgear and control gear standard, IEC 61439 'Low-voltage switchgear and controlgear assemblies' has three methods which can be...

MIT OpenCourseWare

MIT OpenCourseWare, makes the materials used in teaching all MIT subjects available on the Web, free of charge, to any user in the world.

IEC Document Designation

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company...

Why a Sine Wave?

I received this question by email a few weeks. First thoughts was that it is a product of the mathematics of rotating a straight conductor in a magnetic...

Thomas Edison

American inventor Thomas Alva Edison was born in Milan, Ohio on February 11, 1847. He was the youngest of seven children and received little formal schooling...

Nikola Tesla

Nikola Tesla was born exactly at midnight on July 10, 1856 in the tiny village of Smiljan, Lika in Croatia. In his late teens, Tesla left the village to...

Bows and Arrows

It starts with me reading one of the Horrible History books with my son (Groovy Greeks). Arrows were mentioned which lead to the discussion of the bodkin...

Copyright Infringement

myElectrical does not support or promote the use of copyrighted material without the copyright owner's consent. If you believe that material for which...

Welcome back Bottle

‘Kept looking at a card, y’see? Kept looking at it. Welcome back Bottle. Gods below welcome home. The Crippled God A Tale of the Malazan Book of the...

Our website uses cookies so that we can provide a better experience.
To learn more about what cookies are and how to manage them visit AboutCookies.org