7.5 HP motor amps calculations with solved examples and useful HP to Amps conversion formula.
List of Contents
7.5 HP motor Amps Calculations In the case of 120 Volts
Assumed Values:
- Voltage = 120
- %Efficiency = 0.85
- Power Factor (PF) = 0.8
| 7.5 HP | Formula | Solution | Amps |
|---|---|---|---|
| 7.5 HP DC Motor | Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(120 x 0.85) | 54.85294 |
| 7.5 HP Single Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(120 x 0.85 x 0.8) | 68.56618 |
| 7.5 HP Two Phase Four Circuit AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 2) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(120 x 0.85 x 0.8 x 2) | 34.28309 |
| 7.5 HP Three Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 1.73) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(120 x 0.85 x 0.8 x 1.73) | 39.63363 |
7.5 HP motor Amps Calculations In the case of 230 Volts
Assumed Values:
- Voltage = 230
- %Efficiency = 0.85
- Power Factor (PF) = 0.8
| 7.5 HP@230 V | Formula | Solution | Amps |
|---|---|---|---|
| 7.5 HP DC Motor | Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(230 x 0.85) | 28.61893 |
| 7.5 HP Single Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(230 x 0.85 x 0.8) | 35.77366 |
| 7.5 HP Two Phase Four Circuit AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 2) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(230 x 0.85 x 0.8 x 2) | 17.88683 |
| 7.5 HP Three Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 1.73) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(230 x 0.85 x 0.8 x 1.73) | 20.67841 |
7.5 HP motor Amps calculations in case of 480 volts
Assumed Values:
- Voltage = 480
- %Efficiency = 0.9
- Power Factor (PF) = 0.91
| 7.5 HP @ 480 volts | Formula | Solution | Amps |
|---|---|---|---|
| 7.5 HP DC Motor | Amps = (𝐇𝐏 𝐱 𝟕𝟒𝟔)/(𝐄 𝐱 %𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(480 x 0.9) | 12.95139 |
| 7.5 HP Single Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(480 x 0.9 x 0.91) | 14.2323 |
| 7.5 HP Two Phase Four Circuit AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 2) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(480 x 0.9 x 0.91 x 2) | 7.116148 |
| 7.5 HP Three Phase AC Motor | Amps=(HP x 746)/(E x %Efficiency x PF x 1.73) | Amps = (7.5 𝐱 𝟕𝟒𝟔)/(480 x 0.9 x 0.91 x 1.73) | 8.22676 |
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