1. What is Motor Starts Per Hour?

The Motor Starts Per Hour calculation determines how many times a motor can be safely started within one hour, considering both the on and off times of the motor cycle.

2. How Does the Calculator Work?

The calculator uses the motor starts formula:

Where:

• \( t_{\text{off}} \) — Motor off time in minutes
• \( t_{\text{on}} \) — Motor on time in minutes
• 60 — Number of minutes in one hour

Explanation: The equation calculates how many complete on-off cycles can fit into one hour (60 minutes).

3. Importance of Motor Starts Calculation

Details: Proper calculation of motor starts per hour is crucial for preventing motor overheating, ensuring optimal performance, and extending motor lifespan.

4. Using the Calculator

Tips: Enter both off time and on time in minutes. All values must be valid (greater than 0). The calculator will determine how many starts per hour are possible with these cycle times.

5. Frequently Asked Questions (FAQ)

Q1: Why is motor starts per hour important?
A: Excessive starts per hour can cause motor overheating and premature failure. Manufacturers specify maximum starts per hour for their motors.

Q2: What are typical motor starts per hour limits?
A: This varies by motor type and size, but common limits range from 4-12 starts per hour for standard motors.

Q3: How does distance factor into motor starts?
A: Distance affects the on time (t_on) - longer distances typically require longer run times between starts.

Q4: What if my calculated starts exceed the motor's rating?
A: You should adjust your operation to reduce starts per hour or consult with the motor manufacturer about possible solutions.

Q5: Does this calculation apply to all motor types?
A: This is a general calculation. Special motors (like high-efficiency or inverter-duty) may have different start limitations.