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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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