Today's Message Index:
----------------------
1. 12:50 AM - Re: Fuel Totalizer Circuit (sturs)
2. 01:39 PM - SD-8 Alternator Question (Ron Springer)
3. 01:53 PM - Re: SD-8 Alternator Question (Rene)
4. 02:44 PM - Re: SD-8 Alternator Question (Peter Pengilly)
5. 02:56 PM - Re: SD-8 Alternator Question (Ron Springer)
6. 05:26 PM - Re: SD-8 Alternator Question (ashleysc@broadstripe.net)
7. 06:06 PM - Re: SD-8 Alternator Question (Robert L. Nuckolls, III)
8. 06:47 PM - Re: SD-8 Alternator Question (OOPS) (Robert L. Nuckolls, III)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Fuel Totalizer Circuit |
Thanks Paul. My friend already has a replacement - which took him a long time to
find. Mind you hes rather unwilling to take the new one apart and use that as
an example to check against the other!
Thanks for the offer, though. Much appreciated.
Cheers, Stu
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=477507#477507
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | SD-8 Alternator Question |
When I bought my plane, which has an SD-8 alternator as the primary power
source, it came with an inline fuse on one of the two leads from the
alternator.
The guy who installed it said it was an 8 amp alternator so he added a 10
amp inline fuse. But, I believe it provides 8 amps at 14 volts after
regulation and the voltage where the fuse is installed is something like
20-25 volts AC. So, the max current there would probably be a bit less than
8 amps anyway, right?
Regardless, it has never blown, but I am wondering if it is even serving a
useful purpose other than to increase the number of electrical connections
in my plane?
Thanks,
Ron
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | SD-8 Alternator Question |
My chief engineer here at work always says the fuse is there to protect
the wire.keeps the smoke innot the equipment
at the end.
I have the same setup on my standby and I think that is what they gave
me in the kit.
Rene'
801-721-6080
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ron
Springer
Sent: Tuesday, January 23, 2018 2:37 PM
Subject: AeroElectric-List: SD-8 Alternator Question
When I bought my plane, which has an SD-8 alternator as the primary
power source, it came with an inline fuse on one of the two leads from
the alternator.
The guy who installed it said it was an 8 amp alternator so he added a
10 amp inline fuse. But, I believe it provides 8 amps at 14 volts after
regulation and the voltage where the fuse is installed is something like
20-25 volts AC. So, the max current there would probably be a bit less
than 8 amps anyway, right?
Regardless, it has never blown, but I am wondering if it is even serving
a useful purpose other than to increase the number of electrical
connections in my plane?
Thanks,
Ron
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | SD-8 Alternator Question |
See this wiring diagram =93 shows a 15 amp fuse.
http://www.bandc.aero/pdfs/504-500%20REV%20I.pdf
Peter
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ron
Springer
Sent: 23 January 2018 21:37
Subject: AeroElectric-List: SD-8 Alternator Question
When I bought my plane, which has an SD-8 alternator as the primary
power source, it came with an inline fuse on one of the two leads from
the alternator.
The guy who installed it said it was an 8 amp alternator so he added a
10 amp inline fuse. But, I believe it provides 8 amps at 14 volts after
regulation and the voltage where the fuse is installed is something like
20-25 volts AC. So, the max current there would probably be a bit less
than 8 amps anyway, right?
Regardless, it has never blown, but I am wondering if it is even serving
a useful purpose other than to increase the number of electrical
connections in my plane?
Thanks,
Ron
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: SD-8 Alternator Question |
Thanks! I didn't know that it was standard to include the fuse in one of
the wires. The person I bought the plane from made it sound like it was his
idea. The 10 amp size seems to work fine for the SD-8. The wiring diagram
applies to three alternators, including ones that are larger than the SD-8,
which is probably why it calls for the 15 amp fuse.
Ron
On Tue, Jan 23, 2018 at 5:43 PM, Peter Pengilly <Peter@sportingaero.com>
wrote:
> See this wiring diagram =93 shows a 15 amp fuse.
>
>
> http://www.bandc.aero/pdfs/504-500%20REV%20I.pdf
>
>
> Peter
>
>
> *From:* owner-aeroelectric-list-server@matronics.com [mailto:
> owner-aeroelectric-list-server@matronics.com] *On Behalf Of *Ron Springer
> *Sent:* 23 January 2018 21:37
> *To:* aeroelectric-list@matronics.com
> *Subject:* AeroElectric-List: SD-8 Alternator Question
>
>
> When I bought my plane, which has an SD-8 alternator as the primary power
> source, it came with an inline fuse on one of the two leads from the
> alternator.
>
> The guy who installed it said it was an 8 amp alternator so he added a 10
> amp inline fuse. But, I believe it provides 8 amps at 14 volts after
> regulation and the voltage where the fuse is installed is something like
> 20-25 volts AC. So, the max current there would probably be a bit less th
an
> 8 amps anyway, right?
>
> Regardless, it has never blown, but I am wondering if it is even serving
a
> useful purpose other than to increase the number of electrical connection
s
> in my plane?
>
> Thanks,
>
> Ron
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: SD-8 Alternator Question |
Hi Peter;
Hi Ron;
The drawing shows a ten amp fuse for an SD-8 alternator.
Cheers! Stu.
----- Original Message -----
From: "Peter Pengilly" <Peter@sportingaero.com>
Sent: Tuesday, January 23, 2018 2:43:56 PM
Subject: RE: AeroElectric-List: SD-8 Alternator Question
See this wiring diagram =93 shows a 15 amp fuse.
http://www.bandc.aero/pdfs/504-500%20REV%20I.pdf
Peter
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectr
ic-list-server@matronics.com] On Behalf Of Ron Springer
Sent: 23 January 2018 21:37
Subject: AeroElectric-List: SD-8 Alternator Question
When I bought my plane, which has an SD-8 alternator as the primary power s
ource, it came with an inline fuse on one of the two leads from the alterna
tor.
The guy who installed it said it was an 8 amp alternator so he added a 10 a
mp inline fuse. But, I believe it provides 8 amps at 14 volts after regulat
ion and the voltage where the fuse is installed is something like 20-25 vol
ts AC. So, the max current there would probably be a bit less than 8 amps a
nyway, right?
Regardless, it has never blown, but I am wondering if it is even serving a
useful purpose other than to increase the number of electrical connections
in my plane?
Thanks,
Ron
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: SD-8 Alternator Question |
At 03:37 PM 1/23/2018, you wrote:
>When I bought my plane, which has an SD-8 alternator as the primary
>power source, it came with an inline fuse on one of the two leads
>from the alternator.
>
>The guy who installed it said it was an 8 amp alternator so he added
>a 10 amp inline fuse. But, I believe it provides 8 amps at 14 volts
>after regulation and the voltage where the fuse is installed is
>something like 20-25 volts AC. So, the max current there would
>probably be a bit less than 8 amps anyway, right?
>
>Regardless, it has never blown, but I am wondering if it is even
>serving a useful purpose other than to increase the number of
>electrical connections in my plane?
The SD-8, under some conditions, is capable of 10A
of output. A fuse should be sized for at least 1.5
times the expected continuous load . . . 2x or
3x is not unreasonable giving the very fast action
of a fuse versus circuit breaker.
If the SD-8 feeder is 14AWG or larger, a 20A
fuse is the better choice . . . 30A would not
be out of line.
Bob . . .
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: SD-8 Alternator Question (OOPS) |
At 08:06 PM 1/23/2018, you wrote:
>At 03:37 PM 1/23/2018, you wrote:
>>When I bought my plane, which has an SD-8 alternator as the primary
>>power source, it came with an inline fuse on one of the two leads
>>from the alternator.
>>
>>The guy who installed it said it was an 8 amp alternator so he
>>added a 10 amp inline fuse. But, I believe it provides 8 amps at 14
>>volts after regulation and the voltage where the fuse is installed
>>is something like 20-25 volts AC. So, the max current there would
>>probably be a bit less than 8 amps anyway, right?
>>
>>Regardless, it has never blown, but I am wondering if it is even
>>serving a useful purpose other than to increase the number of
>>electrical connections in my plane?
>
>
> The SD-8, under some conditions, is capable of 10A
> of output. A fuse should be sized for at least 1.5
> times the expected continuous load . . . 2x or
> 3x is not unreasonable giving the very fast action
> of a fuse versus circuit breaker.
>
> If the SD-8 feeder is 14AWG or larger, a 20A
> fuse is the better choice . . . 30A would not
> be out of line.
Hit the 'send' button too soon. The short
answer to your question: That feeder should
be protected. If you've not experienced a
nuisance trip of the 10A fuse, then there's
no pressing need to fiddle with it. If you
DO experience a nuisance trip in the future,
and upsize is indicated, I'd go for 20A
Bob . . .
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|