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1. 08:38 PM - Jabiru Alternator/Regulator OVM Problem (Michael Forhan)
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| Subject: | Jabiru Alternator/Regulator OVM Problem |
I am running a Jabiru 2200 with about 60 hours. I have the B&C "crowbar" overvoltage
module ("OVM") installed and it has been fine until today.
Today I flew for about half an hour. When I throttled back to about 2400 RPM for
descent the 5A circuit breaker began tripping. No problems were noted at cruise
RPM and idle/taxi RPM.
There were no changes in the load on the electrical system--it's a basic VFR setup
with only a COM radio and engine gauges on the DC bus.
The analog panel voltmeter is reading about 14 VDC with the breaker in, but of
course that would not provide any indication of transients that might be tripping
the OVM.
I'm suspecting the regulator--I previously posted here about problems with an unstable
VDO tach reading with the tach input connected to an alternator lead.
Perhaps the problems are related.
Before I start digging into the electrical system, has anyone else seen a similar
problem or have any suggestions?
Thanks!
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