nuckolls.bob(at)aeroelect Guest
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Posted: Sat May 26, 2018 9:54 pm Post subject: Is the OVP 5 A CB supposed to trip when I switch off the |
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At 06:06 PM 5/26/2018, you wrote:
Quote: | ​So I take it that it's not supposed to trip?
I have separate switches for the battery and alternator and they do what they are supposed to.  I don't have a diode installed. Is this critical? |
So Z16 has been modified . . .
Quote: | ALT and the BATT are connected to the starter contactor as per Z16 (well actually Z16v shows the buss connected to the battery contractor but it looks electrically equivalent from the diagram)
So...everything is normal. I can start the engine switch on the loads - I see the ammeter reacting to the loads, the alternator is charging the battery and running all the loads. ​  the System is at 12.8V.
I can switch the battery off and all remains the same.
But when I switch the ALT off the OVP trips. The amps go negative while the ALT is off. I can immediately reset the 5amp CB and switch on the ALT and everything is goes back to normal.
Could the OVP be reacting to a sudden Volt surge caused by the battery taking up the loads? |
Wire per Z16 with 700-2-10, progressive transfer
switch . . . battery should not be OFF
with alternator ON . . . the wiring shown
in Z16 mirrors the legacy switching protocols
adopted for TC aircraft about 50 years ago.
Bob . . .
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