looking for efficiency curves for AvK generator 1

[Yuma]

Dear all,
I am looking for the efficiency curves of an AvK generator, coupled to a 339 CAT engine. The nameplate data:

Type: DIB130F/6D
Year: 1976
Voltage: 380/220
Current: 1750 A
Power: 1150 kVA
Cos phi: 0,8
Speed: 1000 rpm
Frequency: 50 Hz

AvK no longer exist, they eventually became Cummins, we have contacted them but it seems that the information is not available.

If anybody has a similar generator, even if the curves are not available but there is some efficiency figure, etc, I'd appreciate if you would be willing to share it.

Kind regards

 

[waross]

The efficiency of this unit is more affected by the engine fuel consumption than by the generator end.
It is not that good.
If the unit is loaded and running a lot of hours per day, you can possibly make the payments on a new, efficient set with the fuel savings alone.
This is something that it is well to investigate before starting any expensive repairs on that old machine.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[catserveng]

https://stamford-avk.com/sites/default/files/literature/all/dsg086k1_8_50_690.pdf

Here is a datasheet for a current 1000kVA machine, the efficiency curve in this sheet is similar to several I have from Avk for low voltage machines in this size range.

This is a more general set of specs, but likely close to your machine.

https://stamford-avk.com/sites/default/files/literature/all/HCI634W_312.pdf

By the way, there is no CAT 339, you probably meant 399.

MikeL.

 

[Yuma]

Thanks to both of you,

Warross: you are right, the efficiency of the generator is not that important; the reason I am looking for this data is that it is required by the local regulation.

Catserveng: thanks for the data! By the way, a colleague of mine has just found what appears to be the exact figures, and as you expected, they are similar to what the Stanford web says, just 0,5 to 0,7% difference.

Thanks again

 

[Hoxton]

I seem to remember that the international standards do not require the manufacturers to provide curves, only that the nominal efficiency is stated at 50% 75% 100% load at rated power factor.