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mp.gamble(at)talktalk.net
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 Posted: Thu Jun 03, 2010 4:40 am Post subject: Europa electrics |
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Europa xs +912s. (Preparing for first engine start)
Wired up and powered by 12v external source I select master on and note 12 volts on the meter. I then select alternator on and nothing happens. Should I not get an alt warning light in this situation with regulator providing an earth return to the warning light? I do have 12v at the C terminal and at the +ve side of the capacitor.
Comments please.
Mike
G-CFMP
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mp.gamble(at)talktalk.net
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| Posted: Thu Jun 03, 2010 12:10 pm Post subject: Europa electrics |
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Europa xs +912s. (Preparing for first engine start)
Wired up and powered by 12v external source I select master on and note 12 volts on the meter. I then select alternator on and nothing happens. Should I not get an alt warning light in this situation with regulator providing an earth return? I do have 12v at the C terminal and at the +ve side of the capacitor.
Comments please.
Mike
G-CFMP
[quote][b]
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Thu Jun 03, 2010 3:50 pm Post subject: Re: Europa electrics |
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Mike,
You have not described how your Europa is wired, and especially where
and how you have an "Alt Warning Lamp" set up.
Is your aircraft wired per Kirbymoorside, or per an Aeroelectric
scheme?
Have you wired a lamp to the regulator terminal for just such a lamp or is the warning to be driven from elsewhere?
Did you use an LED or an incandescent lamp?
Ira A224 flying 6 years
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Thu Jun 03, 2010 3:51 pm Post subject: Re: Europa electrics |
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Mike,
You have not described how your Europa is wired, and especially where
and how you have an "Alt Warning Lamp" set up.
Is your aircraft wired per Kirbymoorside, or per an Aeroelectric
scheme?
Have you wired a lamp to the regulator terminal for just such a lamp or is the warning to be driven from elsewhere?
Did you use an LED or an incandescent lamp?
Ira A224 flying 6 years
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nuckolls.bob(at)aeroelect
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| Posted: Fri Jun 04, 2010 6:31 am Post subject: Europa electrics |
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At 03:08 PM 6/3/2010, you wrote:
| Quote: | Europa xs +912s. (Preparing for first engine start)
Wired up and powered by 12v external source I select master on and
note 12 volts on the meter. I then select alternator on and nothing
happens. Should I not get an alt warning light in this situation
with regulator providing an earth return? I do have 12v at the C
terminal and at the +ve side of the capacitor.
Comments please.
|
The alternator warning light built into rectifier/regulators
(on pm alternators) and into the regulator of internally
regulated alternators is not generally an all-inclusive
indicator of alternator functionality.
Suggest you consider some form of active notification of
low voltage at the bus for a definitive alternator
monitoring system. This may be built into one of your
off-the-shelf instruments. It can be easily added in
the form of a device like . . .
http://www.aeroelectric.com/Catalog/AEC/9005/LV_Warn_Fab_and_Install.pdf
or
http://www.periheliondesign.com/lvwaabm.htm
or
http://www.periheliondesign.com/moreproductsfiles/LV_Annunciator%20Manual.pdf
Bob . . .
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mp.gamble(at)talktalk.net
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| Posted: Fri Jun 04, 2010 12:25 pm Post subject: Europa electrics |
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Ira,
I have followed the wiring diagram in the manual using a filament lamp as
demanded. I shall recheck the circuits tomorrow, particularly the grounding
of the rectifier, and report back.
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=299943#299943
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rampil
Joined: 04 May 2007
Posts: 870
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| Posted: Sat Jun 05, 2010 3:54 am Post subject: Re: Europa electrics |
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Hi Mike,
First, be careful, the figure showing the regulator pin out in the latest
version of the Rotax Install manual is incorrect. That would be figure
17-69 where the leftmost R pin is actually the L.
The L pin is simply a point with floats essentially unconnected, until
there is adequate voltage on the C line, then L is grounded through a
3.3k ohm resistor. That should then complete the circuit from +12
thought the lamp and resistor (and a FET) to ground.
One might suppose the C voltage threshold should be over 13V, but I
don't have the spec.
The lamp should work as you suspect as per Phil Lockwood.
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