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Klixon Circuit Breaker

 
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billhuntersemail(at)gmail
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PostPosted: Sat Mar 25, 2017 4:34 pm    Post subject: Klixon Circuit Breaker Reply with quote
Hi all, 

I have a slight spacial conflict problem with the instrument panel design and I need a smaller circuit breaker. 
I designed my instrument panel with a row of circuit breakers and I have already had the instrument panel holes drilled and the silk screening done for the circuit breaker labels. My landing gear hydraulic motor requires a 30 amp circuit breaker and I placed it's 30 amp Potter and Brumfield W23-x1a1g-30 circuit breaker on the end of the row however I discovered that I have a slight space conflict to the point where the Potter and Brumfield circuit breaker will not fit in its hole. 
The Klickon 7277 circuit breaker will fit however it seems that they only go up to 25 amps and my landing gear hydraulic power pack motor calls out 30 amps. I am running a 14 VDC system. 
Does anybody know of a smaller circuit breaker that I could use in lieu of this large Potter and Brumfield unit?
I considered running a remote circuit breaker however then I will have this hole in my instrument panel labeled gear hydraulic and that would be just sad to have to roll with that.
I am trying to salvage this little issue so I don't have to mark up a brand new instrument panel and move the circuit breaker to another row so any help would be greatly appreciated!

Bill Hunter

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nuckolls.bob(at)aeroelect
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PostPosted: Sun Mar 26, 2017 7:34 am    Post subject: Klixon Circuit Breaker Reply with quote
At 07:31 PM 3/25/2017, you wrote:
Quote:
Hi all,Â

I have a slight spacial conflict problem with the instrument panel design and I need a smaller circuit breaker.Â

I designed my instrument panel with a row of circuit breakers and I have already had the instrument panel holes drilled and the silk screening done for the circuit breaker labels. My landing gear hydraulic motor requires a 30 amp circuit breaker and I placed it's 30 amp Potter and Brumfield W23-x1a1g-30 circuit breaker on the end of the row however I discovered that I have a slight space conflict to the point where the Potter and Brumfield circuit breaker will not fit in its hole.Â

I wouldn't bring this kind of
high current feeder up to the panel.
I'd use a current limiter at the battery
contactor thus keeping all the fat-wires
of the panel. If there's already a
spot for a breaker marked 'landing gear',
put a 5a breaker there to power the control
system.



Bob . . .

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billhuntersemail(at)gmail
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PostPosted: Mon Mar 27, 2017 8:16 am    Post subject: Klixon Circuit Breaker Reply with quote
Hi Bob, thanks (as always) for your advice! 
I already have two circuit breaker holes  (one labeled "gear control" and the other one labeled "gear hydraulic" and therefore I was trying to figure out some way to salvage this mess and make it look like it it's supposed to be that way. 
So it looks like what I should do is simply remove this 30 amp circuit breaker and cover up its laser etched label with some sort of black paint or happy face sticker or something to make it look like it wasn't there. 
I know you stated "current limiter"  in your reply however is an automotive automatically reseting inline circuit breaker sufficient for airplane use or should it be a real slow blow one shot for real current limiter?

Bill Hunter
On Mar 26, 2017 08:46, "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
Quote:
At 07:31 PM 3/25/2017, you wrote:
Quote:
Hi all,Â

I have a slight spacial conflict problem with the instrument panel design and I need a smaller circuit breaker.Â

I designed my instrument panel with a row of circuit breakers and I have already had the instrument panel holes drilled and the silk screening done for the circuit breaker labels. My landing gear hydraulic motor requires a 30 amp circuit breaker and I placed it's 30 amp Potter and Brumfield W23-x1a1g-30 circuit breaker on the end of the row however I discovered that I have a slight space conflict to the point where the Potter and Brumfield circuit breaker will not fit in its hole.Â

   I wouldn't bring this kind of
   high current feeder up to the panel.
   I'd use a current limiter at the battery
   contactor thus keeping all the fat-wires
   of the panel. If there's already a
   spot for a breaker marked 'landing gear',
   put a 5a breaker there to power the control
   system.



  Bob . . .


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nuckolls.bob(at)aeroelect
Guest
PostPosted: Mon Mar 27, 2017 1:04 pm    Post subject: Klixon Circuit Breaker Reply with quote
At 11:13 AM 3/27/2017, you wrote:
Quote:
Hi Bob, thanks (as always) for your advice!Â

I already have two circuit breaker holes  (one labeled "gear control" and the other one labeled "gear hydraulic" and therefore I was trying to figure out some way to salvage this mess and make it look like it it's supposed to be that way.Â

So it looks like what I should do is simply remove this 30 amp circuit breaker and cover up its laser etched label with some sort of black paint or happy face sticker or something to make it look like it wasn't there.Â

You could put a 5A breaker in there and use it
to POWER the coil on the hydraulic pump contactor . . .


Quote:
I know you stated "current limiter" Â in your reply however is an automotive automatically reseting inline circuit breaker sufficient for airplane use or should it be a real slow blow one shot for real current limiter?

Bill Hunter

I recommend the mini-ANL devices now available
all over the 'net . . . and showing up in some
auto parts stores.

Here one example:

http://tinyurl.com/k4x4bua

Off the shelf holders for these fuses come
in TWO varieties (1) uses 'set screws' to mash
down on the fat-wires, ostensibly capturing
them in the end of the fuse holder . . . AVOID
THESE. (2) uses two threaded posts over which
the fuse is dropped along with the terminals
that bring fat-wires up to the fuse holder. Here's
one example . .

[img]cid:.0[/img]

Obviously, you could make something like this yourself.
Get a piece of phenolic, delrin, lexan, etc, and cut
out a base. Drill 10-32 fuse mounting holes (counter bore
back side for electrical clearance to ground). A couple
more 6-32 attach holes. The cover is more cosmetic than
utilitarian.




Bob . . .

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nuckolls.bob(at)aeroelect
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PostPosted: Mon Mar 27, 2017 2:34 pm    Post subject: Klixon Circuit Breaker Reply with quote
Quote:

Obviously, you could make something like this yourself.
Get a piece of phenolic, delrin, lexan, etc, and cut
out a base. Drill 10-32 fuse mounting holes (counter bore
back side for electrical clearance to ground). A couple
more 6-32 attach holes. The cover is more cosmetic than
utilitarian . . .


P.S. Dug around and found some pix I'd taken
of an exemplar DIY Mini-ANL holder some years
ago . . .

http://tinyurl.com/mv2dq98

http://tinyurl.com/lvununh

http://tinyurl.com/m2tj9ux

http://tinyurl.com/mbmjoev



Bob . . .

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