SIRIUS Motor starter protectors can be used as type-E self-protected manual combination starters per UL508 or as components in group installation per NEC 430-53(C) to turn motors on and off. Each device has built-in heater elements that provide overload protection and magnetic trip elements to protect the motor. When the 3RV2 is used as a component in group installation, multiple MSP's can be installed below one circuit breaker to protect its own motor. A contactor can be mounted to the MSP to provide a remotely operated starter. Class-10.