Today's Message Index:
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1. 07:35 AM - IBBS battery with B and C alternators? (William Greenley)
2. 11:05 AM - Re: IBBS battery with B and C alternators? (user9253)
3. 05:36 PM - Re: IBBS battery with B and C alternators? (Tcwtech)
4. 05:59 PM - Re: IBBS battery with B and C alternators? (William Greenley)
Message 1
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| Subject: | IBBS battery with B and C alternators? |
Still learning about alternators and have a question. Building an RV-10
with IO-540 engine. Have to mount on the engine BC460-H belt driven 60 amp
alternator, and BC410-H accessory case mounted backup alternator. Thinking
about failure scenarios. My understanding is that a master contactor or
battery failure would take out both alternators as they need a battery
online to help control the operation of the alternator. With the IBBS 6 AH
battery having a charging line off of the main power bus, would that have
any influence on this?
Bill Greenley
Message 2
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| Subject: | Re: IBBS battery with B and C alternators? |
Once up and running, an alternator will keep working even if the battery is disconnected.
However, the the alternator output might be unstable without a battery.
A contactor failure or battery open circuit failure will not take out an
alternator, but the output voltage might fluctuate. Yes, a 6 amp hour will
have a stabilizing affect. Exactly how much will need to be determined by testing.
It is very rare for a battery to fail suddenly without warning, although
my PC680 did suddenly develop an internal open circuit. The vast majority of
small planes are flying without backup batteries or backup contactors.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=464252#464252
Message 3
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| Subject: | Re: IBBS battery with B and C alternators? |
The IBBS will detect any failure of the main bus that results in a bus voltage
falling below 11 volts, regardless of the cause. When this occurs, backup battery
voltage will be provided to all of the connected equipment powered via the
outputs of the ibbs.
Bob Newman
TCW Technologies, LLC
610-928-3420
> On Dec 22, 2016, at 10:34 AM, William Greenley <wgreenley@gmail.com> wrote:
>
> Still learning about alternators and have a question. Building an RV-10 with
IO-540 engine. Have to mount on the engine BC460-H belt driven 60 amp alternator,
and BC410-H accessory case mounted backup alternator. Thinking about failure
scenarios. My understanding is that a master contactor or battery failure would
take out both alternators as they need a battery online to help control the
operation of the alternator. With the IBBS 6 AH battery having a charging line
off of the main power bus, would that have any influence on this?
> Bill Greenley
Message 4
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| Subject: | Re: IBBS battery with B and C alternators? |
I understand how the IBBS battery system works as a backup, and that is why
I am buying. What I am trying to figure out is since alternators (at least
most included B & C's) need the battery to be online to "buffer" the
alternator output, does the IBBS battery charging line on the main bus
offer any of this "buffer" capability so that an alterntor would keep
running even if he main contactor were to fail. I am thinking it would not
since the charge line is one way only, the IBBS battery would not put out
any current unless their was a power failure.
On Thu, Dec 22, 2016 at 8:34 PM, Tcwtech <rnewman@tcwtech.com> wrote:
>
> The IBBS will detect any failure of the main bus that results in a bus
> voltage falling below 11 volts, regardless of the cause. When this
> occurs, backup battery voltage will be provided to all of the connected
> equipment powered via the outputs of the ibbs.
>
> Bob Newman
> TCW Technologies, LLC
> 610-928-3420
>
> > On Dec 22, 2016, at 10:34 AM, William Greenley <wgreenley@gmail.com>
> wrote:
> >
> > Still learning about alternators and have a question. Building an RV-10
> with IO-540 engine. Have to mount on the engine BC460-H belt driven 60 amp
> alternator, and BC410-H accessory case mounted backup alternator. Thinking
> about failure scenarios. My understanding is that a master contactor or
> battery failure would take out both alternators as they need a battery
> online to help control the operation of the alternator. With the IBBS 6 AH
> battery having a charging line off of the main power bus, would that have
> any influence on this?
> > Bill Greenley
>
>
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