Today's Message Index:
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1. 07:04 AM - Re: regulator-rectifier questions (user9253)
2. 07:10 AM - Re: Bad overvoltage module? (user9253)
3. 07:22 AM - Re: Bad overvoltage module? (user9253)
4. 08:09 AM - Re: Bad overvoltage module? (Charles Brame)
5. 08:48 AM - Re: Re: regulator-rectifier questions (Ken Ryan)
6. 11:10 AM - Re: Bad overvoltage module? (user9253)
Message 1
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| Subject: | Re: regulator-rectifier questions |
Yes, you have correctly identified the function of C, L and B+
The R terminal is connected to the B+ terminal. Why, I do not know, either for
increased ampacity or redundancy. According to a schematic of the regulator
that I have seen, terminals R and B+ are also connected together inside of the
regulator.
On page 18-3 of this document, http://www.vansaircraft.com/pdf/revisions/RV-12/User_Manuals/MM.pdf
is a wiring diagram of the regulator in Van's RV-12.
The warning light is not needed if an EFIS indicates a low voltage condition.
The regulator should be mounted in a cool location. It is notoriously prone to
failure from overheating. Heat conductive grease should be applied to the mounting
base.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435556#435556
Message 2
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| Subject: | Re: Bad overvoltage module? |
I agree with others that not having over-voltage protection is a bad idea. High
voltage can damage expensive avionics in much less time than a human can react
to shut it off.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435558#435558
Message 3
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| Subject: | Re: Bad overvoltage module? |
> when I turned on the backup PM alternator with engine off, my 5 amp circuit breaker
instantly tripped.
With the over-voltage module removed from the circuit, does the relay energize
(click) when the aux alt switch is turned on? And does the circuit breaker not
trip? If both true, then the fault must be the O.V. module.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435559#435559
Message 4
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| Subject: | Re: Bad overvoltage module? |
I noted the recommendation that the OVM be checked annually. I have not done that
in the nearly eight years my RV has been flying. Nor has the OVM ever shut
down the alternator. Nor have I had any voltage surge that damaged anything. Just
lucky?
What is the best (easiest) method to check the OVM operation?
Charlie Brame
RV-6A N11CB
San Antonio
Message 5
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| Subject: | Re: regulator-rectifier questions |
Thanks Joe.
On Wed, Dec 10, 2014 at 6:03 AM, user9253 <fransew@gmail.com> wrote:
>
> Yes, you have correctly identified the function of C, L and B+
> The R terminal is connected to the B+ terminal. Why, I do not know,
> either for increased ampacity or redundancy. According to a schematic of
> the regulator that I have seen, terminals R and B+ are also connected
> together inside of the regulator.
> On page 18-3 of this document,
> http://www.vansaircraft.com/pdf/revisions/RV-12/User_Manuals/MM.pdf
> is a wiring diagram of the regulator in Van's RV-12.
> The warning light is not needed if an EFIS indicates a low voltage
> condition.
> The regulator should be mounted in a cool location. It is notoriously
> prone to failure from overheating. Heat conductive grease should be
> applied to the mounting base.
> Joe
>
> --------
> Joe Gores
>
>
Message 6
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| Subject: | Re: Bad overvoltage module? |
> What is the best (easiest) method to check the OVM operation?
Page 1 of his document http://www.aeroelectric.com/DIY/DIY_Crowbar_OVP_F.pdf
shows how to test an over-voltage module. The best way is on a workbench using
an adjustable DC power supply. The easy way is in the aircraft using alligator
clips and a battery. Bob says to use a 6 volt lantern battery, but 4 D cells
in series might work too. Notice that the negative alligator clip is attached
to the aircraft power bus. I recommend that all avionics and any polarity
sensitive devices be shut off prior to doing this test.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=435567#435567
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