1. What are Standard Pump Motor Sizes?

Definition: Standardized power ratings for electric motors used in pump applications, measured in kilowatts (kW).

Purpose: Helps in selecting appropriately sized motors for different pumping applications.

2. Common Standard Sizes

Standard motor sizes typically follow a preferred number series (R10 or R20) and include:

• Small residential pumps: 0.75 kW, 1.1 kW, 1.5 kW
• Medium commercial pumps: 3 kW, 4 kW, 5.5 kW, 7.5 kW
• Large industrial pumps: 11 kW, 15 kW, 18.5 kW, 22 kW, 30 kW, 37 kW

3. Importance of Standard Sizes

Details: Using standard sizes ensures availability, interchangeability, and cost-effectiveness of motors.

4. Using This Reference Tool

Tips: Select your application type to see commonly used motor sizes for that category.

5. Frequently Asked Questions (FAQ)

Q1: Why are motor sizes standardized?
A: Standardization allows for mass production, reduces costs, and ensures compatibility.

Q2: Can I use non-standard motor sizes?
A: While possible, non-standard sizes are more expensive and may have longer lead times.

Q3: How do I choose between similar sizes?
A: Consider your pump's power requirements, efficiency, and future expansion needs.

Q4: Are these sizes global standards?
A: These are common IEC standards; some regions may have slightly different preferred sizes.

Q5: What's the relationship between kW and HP?
A: 1 HP ≈ 0.746 kW. Standard sizes often correspond to round HP values (e.g., 5 HP ≈ 3.7 kW).