Cummins Generator Technologies offers Alternator Protection Module. Cummins Generator Technologies manufactures ac generators and accessories that are used for industrial, marine / off shore, commercial and other continuous power applications. Alternator Protection Module detects overload conditions by measuring voltage discrepancies in the generator phase voltages. The unit switches in these Modules are changeover switches. It can be incorporated to trip a circuit breaker, stop the engine, or de-excite the generator.