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nuckolls.bob(at)aeroelect
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 Posted: Tue Oct 11, 2016 5:14 pm Post subject: battery contactor vs starter contactor wiring |
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At 01:15 PM 10/11/2016, you wrote:
| Quote: | I haven't seen any responses to this. Did I ask a dumb question?
<snip>
Reviewing 13/8 I notice that the battery contactor jumps power from the big terminal and then switches the coil ground, but the starter contactor switches coil positive. Why do it differently on one than the other? |
so you don't have to protect the control wire.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Tue Oct 11, 2016 5:14 pm Post subject: battery contactor vs starter contactor wiring |
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At 03:30 PM 10/11/2016, you wrote:
| Quote: | --> AeroElectric-List message posted by: Kent or Jackie Ashton <kjashton(at)vnet.net>
The difference is the fuse. In both of them, grounding the coil circuits actuates the solenoids but there is no fuse on the battery contactor circuit. If you visualize the starter contactor wired the same way as the battery contactor, you would have to bring the output side of the actuating coil back to the cockpit to the starter switch and thence through a single dedicated fuse. Wiring it the way it is allows you to use a fuse or CB in the fuse panel.
Just a guess. |
Actually . . . a fact
Bob . . .
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