Re: What kind of a regulator is this one ?

Posted by Bob M on September 13, 2002 at 09:39:55 from (165.170.128.65):

In Reply to: What kind of a regulator is this one ? posted by Amateur Mechanic on September 13, 2002 at 07:47:35:

Well I've never run across what you've described. However here's few thoughts on how it might work:

One of the two relays will be the cutout relay. It will be the one which has it's contact points held OPEN by spring tension. It's purpose is to disconnect the generator from the battery when the generator voltage is below battery voltage (prevents the battery from running down thru the generator when the motor is shut down).

The other relay is a voltage regulator relay. It's contact points should be held CLOSED by spring tension. It's there to limit the generator output voltage to about 8 volts to protect against overcharging the battery, etc. Depending upon the regulator design this relay may have a second winding so it also limits generator output current (to prevent burning the generator up under abnormal load.)

The external ceramic resistor is probably a field resistor. It works together with the regulator relay to control field current and hence output voltage.

Don't know about the purpose of the fuse. A couple guesses: If it's is rated at only couple amps, it's probably there to protect the generator field windings from an overcurrent condition. If the fuse is rated at 15 - 20 amps or more, it's probably for output current protection (to protect the generator/regulator should a short develop in the electrical system.)

Where to hook up the the external wiring system? Should be a metal tab on the regulator. The tab will be connected internally to one of the cutout relay contact points.

I'm curious if anyone has first hand knowledge of this setup....

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