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EXTERNAL PWR operations (follow up to follow up)

 
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nuckolls.bob(at)aeroelect
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PostPosted: Sun May 17, 2020 7:11 pm    Post subject: EXTERNAL PWR operations (follow up to follow up) Reply with quote

A 'real' charger is will replenish a deeply
discharged battery in a practical period of time,
say overnight at most. This class of charger is
in the 5A plus class.

However, any charger with an auto shut down
feature will be thwarted by the parasitic drain
of the ground power contactor coil.

A smart charger expects the recharge current
to approach zero as full charge is achieved.
If it's powering a contactor too . . . the
current never drops low enough to terminate
the charge.

Hence, 'smart' chargers should be connected
to the battery via dedicated connections -OR-
the charger should be clipped to battery
terminals AFTER the ground power contactor
-OR- the battery should be removed from
the airplane for a deep replenishment charge.


Bob . . .


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supik



Joined: 22 Aug 2018
Posts: 50

PostPosted: Fri May 22, 2020 5:12 am    Post subject: Re: EXTERNAL PWR operations (follow up to follow up) Reply with quote

Great and valuable points!!!

Thank you for all your exhaustive answers!


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