Fuses serving motor circuits should be:a) Quick blow typeb) Oversized by 2.5%c) Undersized 3.5%d) Time delay type
D
The correct answer is d) Time delay type.
Motor circuits have large startup currents, and using a quick blow type fuse or an oversized fuse can result in the fuse blowing unnecessarily during startup. This can cause frequent replacements and downtime of the motor.
On the other hand, an undersized fuse will not be able to handle the current demands of the motor and can result in overheating and damage to the motor’s windings.
A time delay fuse is designed to handle the high startup currents of motors while still providing adequate protection against overcurrents. It allows for a temporary surge in current during startup but will blow if a sustained overcurrent occurs, protecting the motor and circuit from damage.
Therefore, it is recommended to use time delay fuses for motor circuits.
More Answers:
Choosing the Right Wire for Damp Locations: Benefits and Drawbacks of NMW, NMD, LVT, and BX WiresMaximizing Accuracy: Utilizing Inline Ammeters to Measure Current Flow
Detect and Fix Short Circuits: The Role of Ohmmeter in Electric Motor Maintenance