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
Engr.Naeem1
Engr.Naeem

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...





Cold Fusion (or not?)

Recently I have seen a few interesting articles on viable cold fusion; the combining of atoms at room like temperatures to create boundless energy. Now...

Back to basics - the Watt (or kW)

When thinking about watts (W) or kilowatt (kW = 1000 W) it can be useful too keep in mind the fundamental ideas behind the unit. Watt is not a pure electrical...

RLC Circuit, Resistor Power Loss - some Modelica experiments

Modelica is an open source (free) software language for modelling complex systems. Having never used it before, I thought I would download a development...

How to measure power supply quality

If your are ever called out to troubleshoot something on your electrical system, one of the first things consider is the supply voltage. You want to ensure...

Write your best report

Years ago I was told that you should always try to write the best report you can.  Many years later I still think on this as one of the better pieces of...

Closed Doors

"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong...

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...

Motor Insulation

Insulation on a motor prevents interconnection of windings and the winding to earth.  When looking at motors, it is important to understand how the insulation...

Back to Basics - Ohm’s Law

Electrical engineering has a multitude of laws and theorems. It is fair to say the Ohm's Law is one of the more widely known; it not the most known. Developed...

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.

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