How to / DIY > Generators

Lister HA and Brush RS1B generator

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Adscnc:
Hi
I have just acquired a Lister HA 2 cylinder with a Brush RS1B alternator generator.
(3 phase 15 Kva)  it hasnít run for 10 years.
The engine started on the button.
At this stage I didnít know wether it was capable of generating any electricity.
I fired it up and all went well, until after about 90 seconds I could smell that familiar smell of burning electrics so I shut her down.

It appears that the fins have over heated and taken out a cable and melted the connected block. See photos.
Only the 2 right hand front fin sets have over heated.

Some questions:

What are the fins for? Is it the rectifier/ voltage regulator?
Why might they have over heated, a short some where?
I guess it is not worth repairing.

Can I fit a  modern voltage regulator?
Should I consider replacing the whole alternator?
The lister engine runs well, no oil leaks and in great condition, spins a 1500 rpm.

Is this suitable?
https://www.ebay.co.uk/itm/New-15KVA-400V-1500-Rpm-Stamford-UK-Diesel-Generator-Alternator-450-vat-/254634455766?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0
I appreciate that there is some engineering required to mount it!

Any thoughts on this would be appreciated.
Thanks

mike90045:
Those fined parts are Selenium Rectifiers.   When they die, they release toxic fumes.  Your manual/schematic will give the voltage and amp rating, modern replacement diodes are much smaller

The cable likely was hanging by a just few strands which were overloaded and melted the terminal block. ( IMHO )

Adscnc:
Hi All,

I have researched fitting a solid state rectifier and looks very possible. Unfortunately I dont have a manual , the only info i have is what is on the plates.

Can I fit an AVR? if so does this do away we the need for the rectifier?

Thanks

mike90045:
What  is the info on the plates ?    300V  5A ?  something like that ?

You still need to rectify to get the DC control voltages to run the DC half.

I don't know anything about retrofitting a AVR to those.

Adscnc:
 hi
415/230 volts
20.9 amps

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