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Define the following ratings of a motor: (i) Horsepower rating (ii) Short-time rating

1 Answer

(i) **Horsepower rating**:  
The horsepower rating of a motor refers to the maximum power output that the motor can deliver continuously without overheating under standard operating conditions. It is a measure of the motor's capacity to perform work and is commonly expressed in horsepower (HP) or kilowatts (kW). This rating is used to indicate the motor's capability to drive loads efficiently over a long period.

(ii) **Short-time rating**:  
The short-time rating of a motor specifies the maximum power output the motor can deliver for a short, specified duration without overheating or being damaged. It is typically expressed in minutes, such as "15-minute rating" or "30-minute rating." This rating is used when the motor is expected to operate for brief periods and then allowed to cool down.
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