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Old 05-31-2018, 11:48 AM   #44
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Join Date: Feb 2010
City & State: S.F. Bay area
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Line Voltage: 120V 60Hz
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Posts: 36,776
Default Re: Repair Fence Energizer SS-1000E Fi-Shock

Originally Posted by stormy1777 View Post
... the fuse is OK, b/c it has 230vac across it.

Originally Posted by redwire View Post
No, if there is a large voltage drop across the fuse, it has high resistance.

Sometimes corrosion or carbon-tracking can wrongly give low-ohms reading to a part (resistor, fuse etc.) and then the part open-circuits when powered up.

I learned big capacitor C1 16uF/400V is a MAP AC motor starting cap, polypropylene film dielectric but oil filled. These have an internal safety pressure-switch that open-circuits the cap if pressure gets too high. Not relevant here but good to know, this type of (film) caps can go open.

Good catch about the Vdrops of 230V on the fuse, I did not see that before, may be bad fuse holder contacts.
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Last edited by budm; 05-31-2018 at 11:49 AM..
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