In a motor, power is delivered to the load by converting electrical energy per the following laws of science. … A watt (W) is a unit of power defined as one Joule per second. For a DC source the calculation is simply the voltage times the current: W = V x A.

## How is motor horsepower calculated?

The quickest method to closely estimate motor horsepower is to use a digital clamp meter to measure current and voltage to the motor, and then perform a simple calculation. Use this formula to estimate motor horsepower. Horsepower**(hp)= Voltage x Amperage x % EFF x power factor x 1.73/746**.

## How do you calculate the power consumption of a single phase motor?

Single-Phase Calculations

Basic electrical theory tells us that for a single-phase system, **kW = (V × I × PF) ÷ 1,000**. kW = (V × I) ÷ 1,000.

## How do I know how many watts my amp is putting out?

Anyway, the standardized test is to measure the **voltage across a 8 Ohm power resistor at 1% distortion and then calculate the power from P=V^2/R**. This is what the wattage rating of an amp means.

## How many amps is 3 horsepower?

Common Horsepower to Amps Conversions

Horsepower | Amps | Efficiency |
---|---|---|

3 HP | 20.7 A |
90% |

3.5 HP | 24.2 A | 90% |

4 HP | 27.6 A | 90% |

4.5 HP | 31.1 A | 90% |

## How many horsepower is a 10 amp motor?

Common Amps to Horsepower Conversions

Amps | Horsepower | Efficiency |
---|---|---|

10 A | 1.45 HP |
90% |

15 A | 2.17 HP | 90% |

20 A | 2.9 HP | 90% |

25 A | 3.62 HP | 90% |

## How many kW is 1kva?

kVA to kW Conversion Chart

kVA | kW |
---|---|

1,000 kVA | 800 kW |

1,125 kVA | 900 kW |

1,250 kVA | 1,000 kW |

1,563 kVA | 1,250 kW |

## How many watts does a 25 hp motor use?

Re: Cost to operate a 25 HP Motor…

25 hp = **18,642.5 Watts** according to my calculator. 18.6 KW * $. 08 = $1.488 per hour. At 18.6KW / 220V the motor draws 84.5 amps.