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Messages - SimonC

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1
Generators / Re: Brush Wiring Diagram E9840322
« on: February 26, 2019, 12:45:15 PM »
Thanks guys, thought I had better check as it looks like the wiring had been modified to fit the silicon rectifier.

Best regards
Simon

2
Generators / Re: Brush Wiring Diagram E9840322
« on: February 25, 2019, 09:32:40 AM »
Hi, The new rectifiers have arrived and I am working out how to fit them to some aluminium channel I plan to use as heatsink. One query regarding the wiring of the replacement for the blue rectifier - when I traced the wiring the resistance appears to be in series with the rectifier, is this normal/correct? or should there be an additional link wire to put it in parallel like on the other rectifier/resistances? I thought the resistance was the means of adjusting the output voltage. Does anybody know?

Beat regards
Simon 

3
Generators / Re: Brush Wiring Diagram E9840322
« on: February 11, 2019, 03:10:59 PM »
Hi Bob, I have traced the wiring by hand, jotted it down and produced this sketch attached. Not sure if I got all the wires traced though - I could only see the field wires enter the stator windings. Hope you have more experience of generators to be able to follow the diagram - my own limited electrical knowledge allows me to follow the logic partly but I cannot see the purpose of the two old rectifiers. I plan to replace all three rectifiers with similar units to those suggested but at present do not know which of the field wires would be positive (apart from the one on the new rectifier)

Best regards
Simon

4
Generators / Re: Brush Wiring Diagram E9840322
« on: February 11, 2019, 02:56:35 PM »
Hi Bob,

5
Generators / Re: Brush Wiring Diagram E9840322
« on: February 06, 2019, 09:05:19 AM »
Thanks for the quick reply Bob and for the help with pictures (I was trying to follow the instructions regarding the gallery). I have attached some photos of the slip rings and rectifiers - the engine is manual start only - no battery. The output is switched either 115VAC or 230VAC. I haven't traced the wiring yet but think the 115v side is the twin rectifier/resistor setup with the larger single resistor being on the 230V side.

Many thanks
Simon

6
Generators / Re: Brush Wiring Diagram E9840322
« on: February 05, 2019, 11:54:20 AM »
Hi, I'd like to re-introduce this thread. I am another member of the Canal Trust and am trying to take up and fix the problem with the generator. The generator is a stand alone unit meant for site work and not a Start-O-Matic. It generates either 115VAC or 230VAC (switchable between the two). When I took the end covers off there are four slip rings and what seems to be two sets of rectifier/resistor packs - one has a single resistor and a replacement silicon rectifier (no heat sink) the other side has two smaller resistors and two selenium rectifiers. I am no electrical engineer but am guessing there are two windings on the rotor giving 115VAC which are connected either in parallel to give 115VAC 25 amps or series to give 230VAC 12.5 Amps. It would be nice if someone could supply a copy of the wiring diagram rather than me having to grovel in the dirt trying to draw my own.
I also really need help to size up new replacements for all the rectifiers - both the selenium and the 'new' replacement at the same time

Simon

PS This is my first post - I will try and post some pictures when I find out how. 

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