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longg(at)pjm.com
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 Posted: Tue Feb 17, 2009 2:21 pm Post subject: DC Power Switch on Z-13/8 |
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I am using Z13/8 along with Z-25 for a IR Alternator.
Behavior: When I pull the 5 amp alt breaker with my DC switch on Alt, it
completely dumps my main power bus.
Question: Is this by design? Is there a way to trip the Alt without
providing a blackout? I would prefer to shut down the main gracefully if
the alternator trips.
(this may be me...) On Z-24 the DC Switch terminal (5) leads to the
master battery contactor. As shown this did not work for me. I switched
2 & 5 as shown on Z-13 and this appeared to fix the problem. I am not
sure if this is a diagram error or I have a wire crossed?
Thanks,
Glenn
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nuckolls.bob(at)aeroelect
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| Posted: Wed Feb 18, 2009 7:41 am Post subject: DC Power Switch on Z-13/8 |
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At 04:19 PM 2/17/2009, you wrote:
| Quote: |
I am using Z13/8 along with Z-25 for a IR Alternator.
Behavior: When I pull the 5 amp alt breaker with my DC switch on Alt, it
completely dumps my main power bus.
Question: Is this by design? Is there a way to trip the Alt without
providing a blackout? I would prefer to shut down the main gracefully if
the alternator trips.
(this may be me...) On Z-24 the DC Switch terminal (5) leads to the
master battery contactor. As shown this did not work for me. I switched
2 & 5 as shown on Z-13 and this appeared to fix the problem. I am not
sure if this is a diagram error or I have a wire crossed?
|
You probably have it wired improperly. With a progressive
transfer switch, full down should be OFF . . . no connections
closed through either side of the switch. Mid position should
close the battery contactor and bring the bus up. Pulling the
ALT breaker should have no effect on BAT only operations.
Full up position should add the alternator if the breaker
is closed . . . otherwise, nothing happens. Of course, the
engine has to be running for the bus voltage to come up and
turn off the LV Warning lights . . . but even with the enigine
not running, you should hear the b-lead contactor close when
you go from mid to full up positions. Pulling the alt breaker
should open the b-lead contactor only leaving the battery
contactor closed and the bus still hot.
See Note 15 of
http://www.aeroelectric.com/Rev12A/AppZ_Rev12A.pdf
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
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