daestrom wrote:

"Rob" wrote in message
om...
Hi,

I have a 3000 rpm 11.8 KVA Fisher Panda generator that has both 1 and
3 phase outputs. I am looking to use the 3 phase output to power a 3
phase motor of around 10kW to drive a bow thruster in a barge at
approx 1500rpm. A colleagu has a Northern Lights 10KVA genset and
successfully powers a 9kW 3 phase motor in a similar set up. Would
appreciate any pointers - such as need for a capcitor bank to meet the
surge on starting.



I have no direct experience of this. However the power requirements of
the bow thruster won't approach anything like the rated 10KW until the
speed of the propellor is fairly close to the 1500 rpm.
IIRC the power required is proportional to the cube of the prop speed.
The power factor of the motor will be poor on starting but improve as
the prop comes up to speed and a pf of 0.8 is plausible giving 11.8 kVA
* 0.8 = 8.9 kW.

Does your colleague have capacitors? What sort of over current
protection?
The fact that he/she has it working means it's possible in principle and
there is nothing that makes you setup different.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html