Can someone tell me why you would lose your #2 Avionics when your right current limiter is blown and both generators are on.
Replace the current limiter and #2 Avionics work again.
King Air B200 Current Limiter Question
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stopsquawk
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co-joe
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My understanding is that:
a) if something is designed to handle 325 Amps you should never try to replace it without maintenance first finding out why it blew?
and more importantly
b) I don't think you can actually replace it in flight. 50A could kill you instantly. 325 would turn you into a piece of charcoal.
From the schematic in my 200 manual the avionics number 2 bus is not dual fed. Remember diodes between the right gen bus and the 4 dual fed buses prevent reverse current, so no CL, no #2 avionics.
Make sense?
a) if something is designed to handle 325 Amps you should never try to replace it without maintenance first finding out why it blew?
and more importantly
b) I don't think you can actually replace it in flight. 50A could kill you instantly. 325 would turn you into a piece of charcoal.
From the schematic in my 200 manual the avionics number 2 bus is not dual fed. Remember diodes between the right gen bus and the 4 dual fed buses prevent reverse current, so no CL, no #2 avionics.
Make sense?
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Scuba_Steve
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harveymushman
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co-joe
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Yeah my bad. All the current limiter problems arise when one gen is off line. As long as both are on and charging then a blown CL won't cause a problem.Scuba_Steve wrote:umm if both gen's are online I don't see how you would lose it. I don't have my schematics handy, but if you were to loose the right gen with the limiter being blown then you'd loose a few things.
Ya...I knew someone who did that in the air....quite the lightshow when the ratchet grounded out....got the pilot a company suspension and then a TC one. Absolutly the dumbest thing I have ever heard someone doing in an airplane.co-joe wrote:My understanding is that:
a) if something is designed to handle 325 Amps you should never try to replace it without maintenance first finding out why it blew?
and more importantly
b) I don't think you can actually replace it in flight. 50A could kill you instantly. 325 would turn you into a piece of charcoal.
From the schematic in my 200 manual the avionics number 2 bus is not dual fed. Remember diodes between the right gen bus and the 4 dual fed buses prevent reverse current, so no CL, no #2 avionics.
Make sense?
BTW...if there was enough voltage to push 325 amps thru your body you would be charcoal but at 28v its unlikely you could push more that a few milliamps...across the heart it would kill you but other than that you're OK.
ETTW
1. The company pays me to make money for it.
2. If the company doesn't make money neither do I
3. I still hate simulators
2. If the company doesn't make money neither do I
3. I still hate simulators
Just looking at the Simuflite manual. Couple of things. Are you talking about the 325 amp isolation limiter (also called a current limiter) or the 40Amp current limiter on the #2 Avionics Bus? If it is the 325 Amp isolation limiter I have no Idea why the #2 Avionics Bus wouldn't receive power. Simuflite states "The right Generator Bus feeds the DC Avionics bus No. 2 through a 40A current limiter and a 30A CB." So, if the 40A current limiter fails then #2 Avionics wouldn't receive power the way I read it.
Cheers
Apache
Cheers
Apache
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KISS_MY_TCAS
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I would pay good money to see someone attempt that. Now THAT is dedication....ettw wrote:
Ya...I knew someone who did that in the air....quite the lightshow when the ratchet grounded out....got the pilot a company suspension and then a TC one. Absolutly the dumbest thing I have ever heard someone doing in an airplane.
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Scuba_Steve
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I don't have the diagram in front of me but if what you are saying is correct then the #2 avionics bus would not function in the event of a right gen failure and a right Current limiter failure. That is if its on the right bus and not a duel fed bus. I'll try to remember to look it up tommrow when I'm flying to swift current sask (wee!)Apache64_ wrote:Just looking at the Simuflite manual. Couple of things. Are you talking about the 325 amp isolation limiter (also called a current limiter) or the 40Amp current limiter on the #2 Avionics Bus? If it is the 325 Amp isolation limiter I have no Idea why the #2 Avionics Bus wouldn't receive power. Simuflite states "The right Generator Bus feeds the DC Avionics bus No. 2 through a 40A current limiter and a 30A CB." So, if the 40A current limiter fails then #2 Avionics wouldn't receive power the way I read it.
Cheers
Apache
