Voltage regulator test good or bad?

[mkeleher]

I purchased the CDI 40 amp 4 wire stator kit with the dual voltage regualtor to replace water cooled reg. Stator is 174-9610K2, dont have the kit part #. When I installed the kit I wired the stator incorrectly to the voltage regulator(like a dummy) and freid one of the regulators. So one reg was fried and the other the other had perfect readings except for one test. You are supposed to get ABOUT 56,000 ohms from yellow wire to ground and a high number from the other yellow to ground. I got the high number ohms to ground and also got 60,000 ohms to ground out of the other. Its not exactly 56,000 ohms but very close. Do you think this volt reg test bad if it is 60,000 ohms rather than 56,000?

 

[achris]

Re: Voltage regulator test good or bad?

I don't see any problems with 60KΩ instead of 56KΩ.... Button it all up and go fishing...

Chris........

 

[Texasmark]

Re: Voltage regulator test good or bad?

Resistance of copper wire is very temperature dependent! As achris said, button it up and go fishing!

Mark

 

[Chris1956]

Re: Voltage regulator test good or bad?

Gee, Aren't both of those numbers an "Open" on a 12V system? My ohm's law is a little fuzzy....

 

[Texasmark]

Re: Voltage regulator test good or bad?

Gee, Aren't both of those numbers an "Open" on a 12V system? My ohm's law is a little fuzzy....

Ohm's law states that a current of 1 ampere through a resistance of 1 ohm will produce a 1 volt drop. Resistance is just a spin off of the basic equation. It goes on to specify power as Power dissipated = Voltage x Current for a DC circuit (Voltage in volts, current in amperes). Or P = V exp 2/R or P = I exp 2 x R. For an AC circuit you have to include phase angle (lead/lag due to circuit inductance/capacitance), hence Power Factor and all that stuff.

Measuring resistance has to be an open circuit with no voltage applied. If the circuit is closed, hence not open circuited, the shunting of the closed loop will nullify the anticipated ohmic reading.

On today's Digital Multi-meters, one has to touch the leads together to get the lead resistance and then subtract that from the final resistance reading. On a reading of 56k you don't care. But if you are reading a stator's resistance, then it matters! Back in the old days of the analog meters, there was an ohm zero variable resistor on the meter whereby you could zero out the lead resistance and zero the meter.

Mark

 

[quicktach]

Re: Voltage regulator test good or bad?

You should be OK

 

[Chris1956]

Re: Voltage regulator test good or bad?

So, on a 12V, 20A system, 65K ohms of resistance would cause what voltage drop?

 

[Texasmark]

Re: Voltage regulator test good or bad?

So, on a 12V, 20A system, 65K ohms of resistance would cause what voltage drop?

The test is for insulation isolation, not current flow. Usually infinity is the term used, but 60k in a 12v circuit pretty much tells me that my insulation is working.

Mark