Today's Message Index:
----------------------
1. 12:20 AM - Re: z13 battery bus protection (mmcelrea)
2. 12:48 AM - Re: z13 battery bus protection (user9253)
3. 07:57 AM - Re: Re: z13 battery bus protection (Robert L. Nuckolls, III)
4. 12:41 PM - Re: Re: z13 battery bus protection (William Daniell)
5. 01:00 PM - Re: Re: z13 battery bus protection (Charlie England)
6. 03:37 PM - Re: Bulb replacement for my Sandel 3308 EHSI (blues750)
7. 06:28 PM - Re: Re: z13 battery bus protection (Robert L. Nuckolls, III)
8. 09:59 PM - Re: z13 battery bus protection (mmcelrea)
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: z13 battery bus protection |
Hi.
I have no intention of messing with cbs or fuses in flight. The fuse blocks are
mounted on a drop down panel between the main and sub panels. I dont want to
mount the battery bus on the firewall but as this will require a longer wire does
it now need protecting?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=479352#479352
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: | Re: z13 battery bus protection |
Usually the main bus feeder does not have protection other than the ability for
the pilot to shut it off via the battery contactor.
As for the #14 AWG wire connecting the battery to the battery bus, an 18 AWG fuselink
could be used. The 6 inch rule is a rule of thumb, not mandatory. The
longer the wire, the greater the chance of it making sparks which will ignite
gasoline after a forced landing. Protect it well.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=479353#479353
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: | Re: z13 battery bus protection |
At 02:47 AM 4/16/2018, you wrote:
>
>Usually the main bus feeder does not have protection other than the
>ability for the pilot to shut it off via the battery contactor.
>As for the #14 AWG wire connecting the battery to the battery bus,
>an 18 AWG fuselink could be used. The 6 inch rule is a rule of
>thumb, not mandatory. The longer the wire, the greater the chance
>of it making sparks which will ignite gasoline after a forced
>landing. Protect it well.
An extended bus feeder calls for
fault protection . . . protection
that needs to be very robust in
comparison with the loads on the
bus (and associated protections).
Since you're using fuses on the extended
bus (MUCH faster than breakers) and
given that this bus is always hot, I
suggest that the feeder be increased
to 10AWG and that it be protected
with a 30A Maxifuse; much faster than
a fusible link in a fault condition
and much more robust than any single
feeder off that bus . . . you don't
want a fault on a single distribution
to open the feeder fuse and take down
the whole bus.
Bob . . .
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: | Re: z13 battery bus protection |
In this scenario, is there any reason why an ATC fuse bus (20 slot bandc
type) could not be fed from batt and alt straight into the buss through two
of the faston tabs? (As opposed to the main bolt terminal) Each slot could
have a 30a maxifuse?
Will
On Mon, Apr 16, 2018, 12:05 Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 02:47 AM 4/16/2018, you wrote:
>
>
> Usually the main bus feeder does not have protection other than the
> ability for the pilot to shut it off via the battery contactor.
> As for the #14 AWG wire connecting the battery to the battery bus, an 18
> AWG fuselink could be used. The 6 inch rule is a rule of thumb, not
> mandatory. The longer the wire, the greater the chance of it making sparks
> which will ignite gasoline after a forced landing. Protect it well.
>
>
> An extended bus feeder calls for
> fault protection . . . protection
> that needs to be very robust in
> comparison with the loads on the
> bus (and associated protections).
>
> Since you're using fuses on the extended
> bus (MUCH faster than breakers) and
> given that this bus is always hot, I
> suggest that the feeder be increased
> to 10AWG and that it be protected
> with a 30A Maxifuse; much faster than
> a fusible link in a fault condition
> and much more robust than any single
> feeder off that bus . . . you don't
> want a fault on a single distribution
> to open the feeder fuse and take down
> the whole bus.
>
>
> Bob . . .
>
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: z13 battery bus protection |
What's the goal? If you're trying to protect the bus, it's an unneeded
failure point when inserted as a 'master protection device' (detailed in
Bob's earlier linked articles). If protecting the wire, the fuse is on
the wrong end of the wire.
On 4/16/2018 2:40 PM, William Daniell wrote:
> In this scenario, is there any reason why an ATC fuse bus (20 slot
> bandc type) could not be fed from batt and alt straight into the buss
> through two of the faston tabs? (As opposed to the main bolt
> terminal) Each slot could have a 30a maxifuse?
>
> Will
>
>
> On Mon, Apr 16, 2018, 12:05 Robert L. Nuckolls, III
> <nuckolls.bob@aeroelectric.com <mailto:nuckolls.bob@aeroelectric.com>>
> wrote:
>
> At 02:47 AM 4/16/2018, you wrote:
>> <fransew@gmail.com <mailto:fransew@gmail.com>>
>>
>> Usually the main bus feeder does not have protection other than
>> the ability for the pilot to shut it off via the battery contactor.
>> As for the #14 AWG wire connecting the battery to the battery
>> bus, an 18 AWG fuselink could be used. The 6 inch rule is a rule
>> of thumb, not mandatory. The longer the wire, the greater the
>> chance of it making sparks which will ignite gasoline after a
>> forced landing. Protect it well.
>
> An extended bus feeder calls for
> fault protection . . . protection
> that needs to be very robust in
> comparison with the loads on the
> bus (and associated protections).
>
> Since you're using fuses on the extended
> bus (MUCH faster than breakers) and
> given that this bus is always hot, I
> suggest that the feeder be increased
> to 10AWG and that it be protected
> with a 30A Maxifuse; much faster than
> a fusible link in a fault condition
> and much more robust than any single
> feeder off that bus . . . you don't
> want a fault on a single distribution
> to open the feeder fuse and take down
> the whole bus.
>
>
> Bob . . .
>
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
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: Bulb replacement for my Sandel 3308 EHSI |
Am I tilting at windmills with the idea of going to LEDs? [Wink]
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=479386#479386
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: z13 battery bus protection |
At 02:40 PM 4/16/2018, you wrote:
>In this scenario, is there any reason why an ATC
>fuse bus (20 slot bandc type) could not be fed
>from batt and alt straight into the buss through
>two of the faston tabs?=C2 (As opposed to the
>main bolt terminal) Each slot could have a 30a maxifuse?
Recall that circuit protection is for WIRES . . . and
that the protective device is installed as close as
practical to the SOURCE of energy that puts the wire
at risk.
In this case, a MAXIfuse in an in-line holder
taps power off the hot side of the battery or
starter contactors. Energy is then conducted via the
10AWG feeder to the input stud on the fuseblock.
What loads are being assigned to this bus?
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: z13 battery bus protection |
In that case could a fuse link be used on the source end of the wire to protect
the wire and then feeding the bus via one of the fast on rather than the main
bolt terminal to provide fast blow protection to prevent the bus being taken
out? Would 12awg feed wire with 16awg fuselink suffice, or 10awg with 14awg fusel-ink
The bus is supplying the essential bus as backup max load approx 15 amps.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=479390#479390
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! --
|