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Author Topic: Brush Wiring Diagram E9840322  (Read 317 times)

LHCRT

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Brush Wiring Diagram E9840322
« on: August 17, 2018, 12:28:56 PM »
Hi.

The Lichfield Canal restoration group have a Lister Diesel No. 7**3SR121 attached to Brush alternator 2/55343 22, which is not working. Has anybody got the wiring diagram E9840322 please?  We've found a clamp on one of the resistors broken, so are going to fix that.

There are three rectifiers fitted - two original ones with fins and one new 'solid state' replacement. I assume the excitation of the stator is by DC (the output is from the rotor).  Will the alternator 'self excite' after long disuse or will it need a battery to be applied?

Cheers.

ajaffa1

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Re: Brush Wiring Diagram E9840322
« Reply #1 on: August 17, 2018, 11:39:49 PM »
Good Day and welcome. I posted a scan of the startomatic drawing last night under a different thread, so here it is again.

Bob

oldgoat

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Re: Brush Wiring Diagram E9840322
« Reply #2 on: August 18, 2018, 02:59:05 PM »
Throw away the old finned selenium rectifiers and replace them with solid state diodes it will save you grief later

ajaffa1

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Re: Brush Wiring Diagram E9840322
« Reply #3 on: August 19, 2018, 12:35:24 AM »
I completely agree with Oldgoat. Replace all rectifiers with modern silicon, the bridge rectifier for the auxiliary field will require a heat sink. There are also two radio frequency suppressors (one for each slip ring) these are almost certainly shot after 50 years service.

Bob