An induction motor, starting “across the line”, will typically have an instantaneous draw 6x the kw it is rated to run at. e.g. a 10 hp motor is rated at 7.46 kw, so on starting it may draw 75 kw. On 480 volts 3 phase, the amperage will be I = W / (E x 1.73) = 75,000 / (480 x 1.73) = 90.4 amps.

## How do you find the nominal current of a motor?

**The motor FLA calculator uses the following formulas:**

- Single Phase AC
**Motor**FLA (Amperes) = (P [kW] × 1000) / (V × cos ϕ) - Single Phase AC
**Motor**FLA (Amperes) = (P [HP] × 746) / (V × cos ϕ × η) - Three Phase AC
**Motor**FLA (Amperes) = (P [kW] × 1000) / (V × 1.732 × cos ϕ)

## What is the starting current of 1 hp motor?

For a 1 HP 3phase induction motor draws a current =W /V, so 1 HP is equal to 746 watts, or rounded off to 750 watts, so it will be 750 /415 volts =**1.7 amperes**, approximately and at a powerfactor at unity means 1.

## How many amps is 3 horsepower?

AC Motor Full Load Amperes

HP | 200 Volts | 440-480 Volts |
---|---|---|

1 | 4.8 | 2.1 |

1.5 | 6.9 | 3.0 |

2 | 7.8 | 3.4 |

3 | 11 |
4.8 |

## How do you calculate the maximum current of a motor?

I= **P/(1.732*V*Cos pi)**

Here three-phase full load current is equal to the power divided by 1.732 times of line to line voltage and power factor.

## How many kW is a 5hp motor?

Hp to kW Conversion Table

Horsepower | Kilowatts | Rounded Kilowatts |
---|---|---|

1 hp | 0.745699872 kW | 1 kW |

5 hp | 3.72849936 kW |
4 kW |

10 hp | 7.45699872 kW | 7 kW |

15 hp | 11.18549808 kW | 11 kW |

## How much current is needed for a 5hp motor?

Common Horsepower to Amps Conversions

Horsepower | Amps | Voltage |
---|---|---|

4 HP | 27.6 A | 120 V |

4.5 HP | 31.1 A | 120 V |

5 HP | 34.5 A |
120 V |

10 HP | 69.1 A | 120 V |

## How much current does a 1 hp motor consume?

When the 1 HP motor is running continuously for 24 hours, **17.904 units** of Power will be consumed.