Fuses serving motor circuits should be what type?

Fuses serving motor circuits should be what type?

• A. Quick blow type
• B. Time delay type
• C. Oversized by 2.5%
• D. Oversized by 3.5%

Answer: (B)

The time delay type of fuses is the appropriate choice for serving motor circuits due to their ability to accommodate the inrush currents that motors typically experience during startup. When an electric motor is powered on, it can draw a significantly higher current than its regular running current, which is known as inrush current. A quick blow fuse would likely blow during this initial surge, as it cannot withstand the temporary overload. Time delay fuses are specifically designed to handle these short-duration overloads without blowing, thus protecting the circuit and allowing the motor to start without interruption. This feature is essential for ensuring the reliability and functionality of motor circuits in various applications. Therefore, the selection of time delay fuses helps maintain system stability and avoids unnecessary replacements or interruptions.

The time delay type of fuses is the appropriate choice for serving motor circuits due to their ability to accommodate the inrush currents that motors typically experience during startup. When an electric motor is powered on, it can draw a significantly higher current than its regular running current, which is known as inrush current. A quick blow fuse would likely blow during this initial surge, as it cannot withstand the temporary overload.

Time delay fuses are specifically designed to handle these short-duration overloads without blowing, thus protecting the circuit and allowing the motor to start without interruption. This feature is essential for ensuring the reliability and functionality of motor circuits in various applications. Therefore, the selection of time delay fuses helps maintain system stability and avoids unnecessary replacements or interruptions.