Alternator

Any idea where I can find a nearly new/refurbed 35/40 kva alternator to fit on to an engine?
What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.
 

Hazzard

Member
Location
Shropshire
What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.
Thanks for comments, have it sorted now.
 
What engine have you got for it?

Don’t forget the engine will need to be setup to produce the required rated power at 1500rpm, so don’t go looking at rated power at 2600rpm for instance. For a 40 kVA set the engine needs to be producing around 20% more power than that @ 1500 rpm due to mechanical losses, and the ability to hold its revs steady and maintain close to 50Hz output when you load it (or unload it)...

Most sets have a governor setup with tight “droop” control so that the set maintains its regulation within 2 to 3% of 50Hz

Have a read of this article on speed droop for diesel set governors from Woodward. They know a thing or two about governor control.

Also this article about converting general purpose vehicle diesel engines for use on gensets.

Would agree with comments above - in general it’s going to be cheaper and easier to buy a ready made set with all the controls etc ready to go. But as a “development” project it could be interesting. Good luck.
Called Isochronous governors, or something like that.
 

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VÃderstad presents the new Marathon 15/25 point for heavy clay duty

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VÃderstad presents the new Marathon 15/25 point for heavy clay duty



Väderstad introduces the new Marathon 15/25 tine harrow point, which provides guaranteed working depth in heavier soils. Together with the wider Marathon 25/35, the tine harrow Marathon family is now complete.

The 15/25 is a further specialization addition to the Marathon 25/35 introduced in 2018.

Dont be fooled by the smaller size, this is an extremely tough point. It has a narrow bottom of just 15 millimeters with a pointy shape, which means that it can maintain the working depth even in tough soil conditions with heavy clay. It has an even higher soil penetration ability than the Marathon 25/35, says...
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