The Isolator can be controlled by any number of switches although the usual configuration is one internal on-off switch and one external kill button. The unit will instantly trigger into isolation mode when any of the kill buttons are struck or on detection of any fault or break in switch wiring circuits. These microprocessors also monitor the kill switches/buttons for instant activation without false triggering. The two electronic isolation circuits are controlled by microprocessors and incorporate various safety systems including over-temperature and over-current monitoring. This Solid State Isolator is also filled with a hard setting resin which prevents any ingress of dust, dirt or water therefore further increasing its strength and reliability. Both of these types of systems contain mechanical electrical contacts which, due to the combination of high electrical current and the shocks and vibration of the race car environment, sparking between the contacts occurs which results in contact erosion and eventual unreliability. Early types of electrical isolation were by large mechanical master-switches while more modern systems have utilised electro-mechanical solenoids. Solid State means no moving parts, all power switching is fully electronic. The first breaks the connection between the negative side of the vehicle’s battery from chassis/earth, thereby isolating the battery power from all electrical circuits, while the second cuts power to the engine electrics and thereby stops the engine from running. The Solid State Isolator contains two isolation circuits. The circuit breaker, when operated, must isolate all electrical circuits with the exception of those that operate fire extinguishers. The general circuit breaker must cut all electrical circuits, battery, alternator or dynamo, lights, hooters, ignition, electrical controls, etc.
The Cartek Battery Isolator meets these requirements. However, most FIA race and rally championships require cars to be fitted with a spark-proof master switch to isolate the battery from all electrical systems and stop the engine. Unlike race seats, harnesses and fire extinguishers the FIA does not have an approval procedure for Master Switches.
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