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Messages - colinthefox

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As per title, a friend has this diesel generator for sale.

Location is Somerset UK. Collection only. Total weight about a tonne I would estimate.

Lister HR3 3 cylinder air cooled engine with Stamford 26.25kVA 3 phase 380/220V alternator. Anti vibration mounts onto steel skids.
24Volt engine electrical system with vehicle type alternator. Batteries are not included in sale.
Fuel lift pump to raise diesel out of a tank.
Stainless exhaust flexible connector.
Push button electric start/push button stop. Also hand crank.
Control panel with 3 phase circuit breaker.
Date code appears to be 1960 no, I got that wrong. It's 1990. Used in an Irish Railways carriage and always kept inside the carriage under cover.







We hooked up a battery to it yesterday and it started on the button even though the battery was only 12 volts.
Here's a link to a video of the unit starting and running on 30 May 2022 https://youtu.be/Duvia8HlLHg the starter sounds sluggish because it was only a 12V battery.

This appears to be a cracking bit of kit which hasn't been mucked about with.

£1500 GBP



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Right. I've done my own wiring diagram by adapting one I found here on the forum.
A bit clunky to insert an image so I've added it as an attachment.
I hope this will help someone at some time.

So in answer to my own questions:-
  • The battery charge didn't work because the diode was open circuit. Check the simple stuff first!
  • The large resistor in the alternator brushgear enclosure is the main voltage control
  • The resistor in the alternator brushgear enclosure next to the diode controls the load regulation
  • I'll see how it goes before I try an AVR. It might be perfectly OK as it is.
  • Manual for the ST1 bought off eBay today.

Happy days! :)






3
Lister Based Generators / New member with a Lister ST1/Brush SCTF117
« on: March 01, 2022, 07:12:58 PM »
Hi all
New member here with some newbie queries.
I've just bought a Lister ST1 with Brush SCTF117 3kVA 1ph alternator/starter. It looks like it has practically zero working hours because the oil filter is the original with the original still unbroken green paint on it. Other signs are that there is no sign of the generator bearings ever having been greased, and zero wear of the brushgear. The air filter and housing is still clean. Oil on the dipstick is clear and golden. So far so good.

But it does have some (hopefully minor) problems, and I'm hoping someone can help........

I've started it first by hand, then on the battery, and it gives 230V no problem, but doesn't charge the battery on low or high charge settings. Inside the alternator brushgear enclosure the original selenium rectifier is still in place and I will change this for a silicon bridge rectifier. The small wirewound resistor across the rectifier appears to be intact, but the larger item under the opposite cover has two broken clamps. I'm thinking I will make replacement clamps out of some sheet brass.

So my questions are.
  • Does anyone have an owners manual and could send me a PDF of it?
    Is wiring diagram E9840256 included in the manual?
    If not where can I find one?
    Is there a regular reason why the battery charge circuit won't work, before I spend too much time checking it all out. I could use a battery charger, and will use a solar float charger, but would prefer to get it working.
    Does anyone have experience of fitting an AVR to these sets, as I understand they don't cope well with low power factor loads in their original setup.
    What does the larger resistor in the brushgear enclosure do?
I've already read a bit on this great forum, but most of the posts were a while ago, so I'm starting a new one.
I'm an electrical engineer so I should be able to suss it all out eventually.

Anyway, thanks in anticipation.

Colin

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