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kesleyelectric(at)iowatel
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 Posted: Mon Jan 25, 2010 9:59 am Post subject: Z13-8 questions |
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Hi Bob,
As I prepare to begin wiring per Z13-8, I have two questions.
1) Using the B&C LR-3 regulator, can the bus voltage sense lead be placed on the E-bus rather than on the main bus? In the very unlikely event of two failures on one tank of fuel, would this also offer low voltage warning in the if something in the SD-8 system would fail? I seem to recall this question being raised some time ago, but could not locate it in the archives.
2) The installation instructions for the SD-8 call for an inline fuse on one of the output leads. I don't see this included in the Z13-8 diagrams. Is there a reason that it is not shown?
Thanks,
Tom Barter
Kesley, IA
Avid Magnum
[quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Tue Jan 26, 2010 6:25 am Post subject: Z13-8 questions |
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At 10:17 AM 1/25/2010, you wrote:
| Quote: | Hi Bob,
As I prepare to begin wiring per Z13-8, I have two questions.
1) Using the B&C LR-3 regulator, can the bus voltage sense lead be placed on the E-bus rather than on the main bus? In the very unlikely event of two failures on one tank of fuel, would this also offer low voltage warning in the if something in the SD-8 system would fail? |
That's double failure in single tank of gas . . . exceedingly
unlikely. Recommend your ov protection be on main bus and
voltmeter (or instrument containing voltage display function)
run from e-bus.
| Quote: | | I seem to recall this question being raised some time ago, but could not locate it in the archives. |
No, that lead is also the regulator's v-sense lead.
| Quote: |
2) The installation instructions for the SD-8 call for an inline fuse on one of the output leads. I don't see this included in the Z13-8 diagrams. Is there a reason that it is not shown? |
There's a fusible link in the Z-figures
Bob . . . [quote][b]
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user9253
Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan
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| Posted: Tue Jan 26, 2010 8:17 am Post subject: Re: Z13-8 questions |
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Tom,
| Quote: | | can the bus voltage sense lead be placed on the E-bus |
The E-bus is fed through a diode which drops the voltage by about 1 volt. If the regulator senses the E-bus voltage, then the regulator will try to keep the E-Bus at 14 volts. The main bus will be 1 volt higher at over 15 volts. Operating at over 15 volts will shorten the life of the battery and the devices connected to the main bus.
| Quote: | | I don't see this included in the Z13-8 diagrams. |
The fusible link is located above the battery contactor.
Joe
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