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1. 05:23 AM - Re: Ammeter spike (William Daniell)
2. 11:45 AM - Re: Ammeter spike (Pete)
3. 08:16 PM - Re: Ammeter spike (William Daniell)
Message 1
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| Subject: | Re: Ammeter spike |
Pete
1. Here is the wiring schematic which is stock Europa.
2. the "slow blow fuzes" in the diagram where replaced with 25A and 30A
Circuit breakers respectively
3. The spike occurred when I pulled the ALT circuit breaker while the
engine was running. I didn't leave it out for long because I was worried
about damage to the system.
4. I did not pull the battery CB at the same time.
So in summary the ALT CB, when pulled, shuts down the ALT feed to the bus.
My understanding was that one needed to be able to power the electrical
system from either the battery or the alternator alone in the case an
emergency.
Many thanks
Will
[image: Inline image 1]
William Daniell
LONGPORT
+57 310 295 0744
On Sat, Oct 7, 2017 at 3:16 PM, Pete <peterz@zutrasoft.com> wrote:
> Id need to see your wiring schematic, and understand exactly when this
> surge occurs....but there will be a surge if the capacitor is in a
> discharged state, and if there is a switch and shunt between the capacitor
> and the ducatti dump-regulator output, and this switch is closed after the
> engine is already running.
>
> On Oct 7, 2017, at 3:17 AM, William Daniell <wdaniell.longport@gmail.com>
> wrote:
>
> Pete
> thanks. Is this a problem/potential problem? Or is this a short term
> event?
> Will
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
> On Fri, Oct 6, 2017 at 2:31 PM, Pete <peterz@zutrasoft.com> wrote:
>
>>
>> Depending upon where the large capacitor is, yes, it could spike like
>> that of it was discharged.
>>
>> > On Oct 6, 2017, at 11:52 AM, William Daniell <
>> wdaniell.longport@gmail.com> wrote:
>> >
>> > I have a dynon skyview and the ammeter reads off the shunt per dynon
>> manual. My electrical system is standard europa without deviation and i
>> have a rotax 912
>> >
>> > The last time a flew when i started the engine had a red x over the
>> ammeter (ie not working) where it had worked on the previous flight.
>> >
>> > I pulled the alt 30A cb which reset the "instrument" and thereafter it
>> read normally. I left the 30A battery cb set during this process.
>> >
>> > My question: When I pulled the cb the amp reading, once it came alive,
>> spiked up to 60A. I immediately reset the cb and everything settled back
>> down to its normal readings.
>> >
>> > Is this spike normal?
>> >
>> > Thanks
>> >
>> > Will
>>
>> ===================================
>> pa-List" rel="noreferrer" target="_blank">http://www.matronics.com/
>> Navigator?Europa-List
>> ===================================
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
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>> ===================================
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>> -Matt Dralle, List Admin.
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>> ===================================
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>>
>>
>>
>
Message 2
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| Subject: | Re: Ammeter spike |
=46rom your diagram, I cannot see any reason for an excessive current spike w
hen the alt switch/breaker is pulled, and the battery is left in the circuit
supplying the total load (since the capacitor i referenced is before the al
t switch on the alt side). You are correct that you should be able to run o
ff battery with the alt disconnected. What is the voltage on the bus when on
battery only? What is the buss voltage and battery current with everything t
urned on and engine stopped (and alt cct bkr pulled)? You could also try st
arting and running with the alt disconnected, and monitor/record the current
and voltage.
Something seems amiss if you are seeing a 60A current spike when taking the a
lternator out of the cct. Could it be that you actually have a short somewhe
re on your buss, and the alternator is working like crazy to satisfy it, par
tially masking the ammeter reading? Is the alternator actually charging the b
attery when in the cct and engine running? What is the buss voltage in that c
ondition?
Hth,
Pete
> On Oct 9, 2017, at 8:22 AM, William Daniell <wdaniell.longport@gmail.com> w
rote:
>
> Pete
> 1. Here is the wiring schematic which is stock Europa.
> 2. the "slow blow fuzes" in the diagram where replaced with 25A and 30A C
ircuit breakers respectively
> 3. The spike occurred when I pulled the ALT circuit breaker while the eng
ine was running. I didn't leave it out for long because I was worried about
damage to the system.
> 4. I did not pull the battery CB at the same time.
>
> So in summary the ALT CB, when pulled, shuts down the ALT feed to the bus.
>
> My understanding was that one needed to be able to power the electrical sy
stem from either the battery or the alternator alone in the case an emergenc
y.
>
> Many thanks
>
> Will
>
> <image.png>
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
>> On Sat, Oct 7, 2017 at 3:16 PM, Pete <peterz@zutrasoft.com> wrote:
>> Id need to see your wiring schematic, and understand exactly when this su
rge occurs....but there will be a surge if the capacitor is in a discharged s
tate, and if there is a switch and shunt between the capacitor and the ducat
ti dump-regulator output, and this switch is closed after the engine is alre
ady running.
>>
>>> On Oct 7, 2017, at 3:17 AM, William Daniell <wdaniell.longport@gmail.com
> wrote:
>>>
>>> Pete
>>> thanks. Is this a problem/potential problem? Or is this a short term e
vent?
>>> Will
>>>
>>> William Daniell
>>> LONGPORT
>>> +57 310 295 0744
>>>
>>>> On Fri, Oct 6, 2017 at 2:31 PM, Pete <peterz@zutrasoft.com> wrote:
>>>>
>>>> Depending upon where the large capacitor is, yes, it could spike like t
hat of it was discharged.
>>>>
>>>> > On Oct 6, 2017, at 11:52 AM, William Daniell <wdaniell.longport@gmail
.com> wrote:
>>>> >
>>>> > I have a dynon skyview and the ammeter reads off the shunt per dynon m
anual. My electrical system is standard europa without deviation and i have
a rotax 912
>>>> >
>>>> > The last time a flew when i started the engine had a red x over the a
mmeter (ie not working) where it had worked on the previous flight.
>>>> >
>>>> > I pulled the alt 30A cb which reset the "instrument" and thereafter i
t read normally. I left the 30A battery cb set during this process.
>>>> >
>>>> > My question: When I pulled the cb the amp reading, once it came aliv
e, spiked up to 60A. I immediately reset the cb and everything settled back
down to its normal readings.
>>>> >
>>>> > Is this spike normal?
>>>> >
>>>> > Thanks
>>>> >
>>>> > Will
>>>>
>>>> ==========
>>>> pa-List" rel="noreferrer" target="_blank">http://www.matronics.com/
Navigator?Europa-List
>>>> ==========
>>>> FORUMS -
>>>> eferrer" target="_blank">http://forums.matronics.com
>>>> ==========
>>>> WIKI -
>>>> errer" target="_blank">http://wiki.matronics.com
>>>> ==========
>>>> b Site -
>>>> -Matt Dralle, List Admin.
>>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribut
ion
>>>> ==========
>>>>
>>>>
>>>>
>>>
>
Message 3
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| Subject: | Re: Ammeter spike |
Pete
Many thanks
Stand by. I am in, of all places, istanbul. On my way back to base
tomorrow.
Will perforn checks over the weekend and report back.
Will
On Oct 9, 2017 21:48, "Pete" <peterz@zutrasoft.com> wrote:
>From your diagram, I cannot see any reason for an excessive current spike
when the alt switch/breaker is pulled, and the battery is left in the
circuit supplying the total load (since the capacitor i referenced is
before the alt switch on the alt side). You are correct that you should be
able to run off battery with the alt disconnected. What is the voltage on
the bus when on battery only? What is the buss voltage and battery current
with everything turned on and engine stopped (and alt cct bkr pulled)? You
could also try starting and running with the alt disconnected, and
monitor/record the current and voltage.
Something seems amiss if you are seeing a 60A current spike when taking the
alternator out of the cct. Could it be that you actually have a short
somewhere on your buss, and the alternator is working like crazy to satisfy
it, partially masking the ammeter reading? Is the alternator actually
charging the battery when in the cct and engine running? What is the buss
voltage in that condition?
Hth,
Pete
On Oct 9, 2017, at 8:22 AM, William Daniell <wdaniell.longport@gmail.com>
wrote:
Pete
1. Here is the wiring schematic which is stock Europa.
2. the "slow blow fuzes" in the diagram where replaced with 25A and 30A
Circuit breakers respectively
3. The spike occurred when I pulled the ALT circuit breaker while the
engine was running. I didn't leave it out for long because I was worried
about damage to the system.
4. I did not pull the battery CB at the same time.
So in summary the ALT CB, when pulled, shuts down the ALT feed to the bus.
My understanding was that one needed to be able to power the electrical
system from either the battery or the alternator alone in the case an
emergency.
Many thanks
Will
<image.png>
William Daniell
LONGPORT
+57 310 295 0744
On Sat, Oct 7, 2017 at 3:16 PM, Pete <peterz@zutrasoft.com> wrote:
> Id need to see your wiring schematic, and understand exactly when this
> surge occurs....but there will be a surge if the capacitor is in a
> discharged state, and if there is a switch and shunt between the capacitor
> and the ducatti dump-regulator output, and this switch is closed after the
> engine is already running.
>
> On Oct 7, 2017, at 3:17 AM, William Daniell <wdaniell.longport@gmail.com>
> wrote:
>
> Pete
> thanks. Is this a problem/potential problem? Or is this a short term
> event?
> Will
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
> On Fri, Oct 6, 2017 at 2:31 PM, Pete <peterz@zutrasoft.com> wrote:
>
>>
>> Depending upon where the large capacitor is, yes, it could spike like
>> that of it was discharged.
>>
>> > On Oct 6, 2017, at 11:52 AM, William Daniell <
>> wdaniell.longport@gmail.com> wrote:
>> >
>> > I have a dynon skyview and the ammeter reads off the shunt per dynon
>> manual. My electrical system is standard europa without deviation and i
>> have a rotax 912
>> >
>> > The last time a flew when i started the engine had a red x over the
>> ammeter (ie not working) where it had worked on the previous flight.
>> >
>> > I pulled the alt 30A cb which reset the "instrument" and thereafter it
>> read normally. I left the 30A battery cb set during this process.
>> >
>> > My question: When I pulled the cb the amp reading, once it came alive,
>> spiked up to 60A. I immediately reset the cb and everything settled back
>> down to its normal readings.
>> >
>> > Is this spike normal?
>> >
>> > Thanks
>> >
>> > Will
>>
>> ==========
>> pa-List" rel="noreferrer" target="_blank">http://www.matronics.com/
>> Navigator?Europa-List
>> ==========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ==========
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
>
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