What is the kilowatt-amperes range for a motor with a code letter of D, when locked rotor?

The kilowatt-amperes range for a motor with a code letter of D, when in a locked rotor condition, is indeed represented in the specified range of 4.00 to 4.49 kVA. This range is established based on the National Electrical Manufacturers Association (NEMA) standards, which categorize motors by their locked rotor current and corresponding code letters.

The code letters serve as an important reference for understanding the starting characteristics of induction motors, particularly in terms of their power requirements under a locked rotor condition. The letter D specifically corresponds to a moderate power requirement, and motors falling into this classification typically exhibit a locked rotor current that aligns with the kilowatt-amperes range mentioned.

Knowing this range is crucial for applications involving motor installation, selection, and protection, as it helps in sizing equipment like circuit breakers or fuses and ensures that the motor operates efficiently within the expected parameters.