REFLECTOR: Circuit Breakers/Switches

[Scott Derrick]

All this worry about solid state circuit breakers is kinduv funny 
considering the all glass panel airplanes their are now!!!

If you want to know what heats up I'd suggest you open up your PC  touch 
edge of your CPU!  Have a burn kit handy!! ;-)  Because you are going to 
get a major ouch!

Silicon gets hot when you run enough current through it.  One of the 
major limitations of CPU's now is heat dissipation.  Large server farms, 
think Google, are mostly water cooled. Thats right water lines running 
through the computers!

Creating a resistor in silicon is just as easy as creating a power 
transistor and diode, and those three items could make a handy basic 
relay.

I worked for a short time on the Dreamliner at Raytheon, on the Air Data 
system, and I can assure you everything was solid state that had 
electricity running through it.

Scott

-------- Original Message --------
Subject: Re: REFLECTOR: Circuit Breakers/Switches
From: Mark Magee <edjonesbrady at gmail.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 02/09/2012 04:18 PM

> Having worked with all the mechanical methodologies over the years I can't imagine how these SS breakers work. Particularly for that price. What heats up? What releases the circuit from power?? Relays? If so not good.
> Very interesting nonetheless and maybe the next step. I'd want to know more before putting in my bird however.
> I despise even the thought of an in flight fire...:(
>
> Mark B. Magee
> Sent from IPhone 4
>
> On Feb 9, 2012, at 4:36 PM, Tom Falls<tomfalls6 at gmail.com>  wrote:
>
>> Well that's not encouraging. Anybody out there have good or bad experience with solid state circuit breakers?
>>
>> Tom
>>
>> On Feb 9, 2012, at 3:19 PM, John Dibble<aminetech at bluefrog.com>  wrote:
>>
>>> It was my pitch trim relay.  The first time the output voltage got so low that the motor quit running.  Had to land with the trim in the full down
>>> position.  The second time (new relay, same model) it began trimming up uncommanded.  I eliminated the relay and wired direct to the stick.  Works fine.
>>>
>>> John
>>>
>>> Brian Michalk wrote:
>>>
>>>> What happened?
>>>>
>>>> On 2/9/2012 12:59 PM, John Dibble wrote:
>>>>> Not familiar with these.  I've had bad luck with solid state relays and won't use them again.
>>>>>
>>>>> John
>>>>>
>>>>> Tom Falls wrote:
>>>>>
>>>>>> http://www.ztronlabs.com/products.php
>>>>>>
>>>>>> Anybody have experience or thoughts on these solid state circuit breaker/switches? They seem simple, clean, light. The 8 channel unit sells for $189.
>>>>>>
>>>>>> Tom
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because of his art.
Mary Baker Eddy