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Jerry is correct that the Control Vision EXP2 Bus is a power distribution
system that replaces the circuit breakers with faster acting Polyswitches (a
kind of solid-state resettable circuit breaker -- I'll let the EE's describe
it).  The system is limited to 40 amps total.  You can use the switches it
comes with, or substitute your own.

There is a feature that senses bus voltage and shuts off the alternator field
current if the bus voltage goes too high.  There is a feature that shuts off
avionics power while you're cranking the engine.  There is a "soft start"
feature for the landing light circuit that allegedly prolongs bulb life.  
There is a backup battery feature for those of you with electronic ignitions.

It comes with an optional indicator module that shows which polyswitches have
"blown".  This indicator module contains a dimmer circuit for the panel
lighting.

The drawback to this system is that you cannot "pull a circuit breaker", you
can only turn off the switch for each circuit.  There's no need for the
breakers, since wiring protection is provided by the polyswitches.

Much more data is available at www.controlvision.com

- Rob Wolf
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