What does a single-phase motor indicate?

What does a single-phase motor indicate?

• A. Under voltage condition
• B. Loss of one power phase
• C. High efficiency operation
• D. Three-phase supply

Answer: (B)

A single-phase motor indicates a loss of one power phase in a system designed to operate with multiple phases, typically three. In general, these motors are used in applications where three-phase power is not available, providing a simpler, more accessible option for various small-scale or residential applications. The core concept behind a single-phase motor is that it utilizes a single alternating current supply, unlike three-phase motors, which operate on three separate electrical phases. If one of those phases is lost or interrupted, it can lead to the operation of a single-phase motor, resulting in inadequate power supply necessary for the loads that typically require three-phase operation. This scenario emphasizes the importance of understanding phase conditions when diagnosing motor performance and electrical issues.

A single-phase motor indicates a loss of one power phase in a system designed to operate with multiple phases, typically three. In general, these motors are used in applications where three-phase power is not available, providing a simpler, more accessible option for various small-scale or residential applications.

The core concept behind a single-phase motor is that it utilizes a single alternating current supply, unlike three-phase motors, which operate on three separate electrical phases. If one of those phases is lost or interrupted, it can lead to the operation of a single-phase motor, resulting in inadequate power supply necessary for the loads that typically require three-phase operation. This scenario emphasizes the importance of understanding phase conditions when diagnosing motor performance and electrical issues.