Over charging

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Vintage man
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Over charging

Post by Vintage man »

Fitted a Bosch voltage regulator for my generator on a 1600 motor noticed with my volt meter it climbed up to 30 volts then switched off. Is the regulator faulty or is there something I missed. Wiring is correct.


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retrovan
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Re: Over charging

Post by retrovan »

It all depends where you tested.

The genny can go up to 30 Volts, before it gets to the regulator, but the output of the regulator should not go more then 14-15 volts

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Vintage man
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Re: Over charging

Post by Vintage man »

Thanks Herman but that's on the battery
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Re: Over charging

Post by Dawie »

Remember:
1) You must have the right regulator for your generator.

2) Wiring must be correct,

3) Battery is also part of charging system, (it is the "damper" or accumulator). So a dead/ open circuit battery...(dead cell or loose connections inside, or sulphated, not taking the charge), will certainly cause issues. Most older regulators simply pulses the generator on and off max output at varying pulse width. If battery is totally dead or disconnected, these pulses will reach over 30V if generator, or even 80v if alternator at max rpm if charge system does'nt see the battery. (Byebye electrics across the system- fuel injection, elec ignition, radio, globes, or diodes inside if alternator).

This also explains why one should never, ever, disconnect a battery while engine is running. (You "might" get away if engine is only at slow idle, but i would'nt take that chance).

4)In the unlikely event that the mechanical regulator (relay type in big metal box) is faulty, it might be a burnt contact inside. But dont fiddle inside unless you have eliminated all other possible causes).
The "vibrating field-regulating relay" should disconnect field current when exceeding charge voltage. If overvoltage, relay's contact moves even further and shorts out across field windings to protect system.
Staying Aircooled is so much nicer.
Do'nt assume anything- (While doing fault-finding).
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Re: Over charging

Post by Vintage man »

Thanks
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