Today's Message Index:
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1. 04:03 AM - Re: Gerdes vs ACS key switch wiring (supik)
2. 07:46 AM - Re: Z101 with Rotax 915iS (user9253)
3. 07:50 AM - Re: Z101 with Rotax 915iS (user9253)
4. 08:52 AM - Re: Z101 with Rotax 915iS (user9253)
Message 1
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| Subject: | Re: Gerdes vs ACS key switch wiring |
nuckolls.bob(at)aeroelect wrote:
> At 10:00 AM 6/13/2020, you wrote:
>
> >
> > I have the ACS 502 key switch and was wondering how to wire the center ground.
> >
> > B&C instructions for the GERDES key switch say DO NOT connect the center GND
to any structural member in the cabin wheres the ACS instructions tell the
opposite.
> >
> > ACS Note C:
> > http://acsproducts.co/wp-content/uploads/2013/10/Wiring-Diagram.jpg (http://acsproducts.co/wp-content/uploads/2013/10/Wiring-Diagram.jpg)
> >
> > GERDES:
> > https://bandc.com/wp-content/uploads/2019/03/s811-1_contactor_501-3_fig4.pdf
(https://bandc.com/wp-content/uploads/2019/03/s811-1_contactor_501-3_fig4.pdf)
>
> There is no BENEFIT for connecting to ground locally . . .
> but there is RISK for damaging p-lead shields due to
> starter currents flowing in a ground-loop situation.
> Wire per examples in the z-figures where shields are
> terminated at the mags and NO grounds are added at
> the switch(es) whether a o-l-r-b-s keyswitch or
> toggles.
>
>
>
> Bob . . .
Thank you!
--------
Igor
RV10 in progress
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496830#496830
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| Subject: | Re: Z101 with Rotax 915iS |
Bob,
I agree that the Rotax documentation needs improving.
Something is lost in translation.
Here is a link to the Rotax iS engine heavy maintenance manual.
https://www.rotax-owner.com/pdf/MMH_915iASeries_ED0_R1.pdf
Section 24-20-00 page 6 says,
"The two 3-phase AC generators are physically separate power supplies which are
integrated in the engine."
But then in section 71-00-00 page 11 is says,
"Integrated generator Permanent Magnet single-phase generator".
So which is it, 3 phase or single phase. Looking at the picture of cable plugs,
there are 3 wires, so it could be 3 phase. It looks like there are approximately
25 coils.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496832#496832
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| Subject: | Re: Z101 with Rotax 915iS |
Oops, my mistake. The link I posted above is for the 915 engine, not the 912.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496833#496833
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| Subject: | Re: Z101 with Rotax 915iS |
Here is the correct link to the 912iS heavy maintenance manual:
https://www.cps-parts.com/cps/pdf/d05973.pdf
It also has conflicting descriptions of the integrated alternator.
Section 24-20-00 Page 5 says three phase.
Section 71-00-00 Page 11 says single phase.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496834#496834
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