TPC Single Phase Motors Practice Test

The term 'service factor' in motors is a critical parameter that indicates the motor's load-carrying capacity relative to its rated power. It provides a measure of the motor's ability to operate under varying conditions, particularly when subjected to higher loads than its nominal rating. A service factor greater than 1 implies that the motor can handle loads exceeding its rated capacity for short durations without risking damage or reduced lifespan. For instance, a motor with a service factor of 1.25 can operate at 125% of its rated load safely.

Understanding service factor is essential for applications where the load may fluctuate or exceed the normal operating conditions. This helps in selecting a motor that can withstand temporary overloads while still maintaining longevity and performance.