Motor horsepower | Full load amps 230VAC | Full load amps 460VAC |
---|---|---|

2 | 6 | 3.0 |

3 | 9 | 4.5 |

5 | 15 | 7.5 |

7.5 | 22 | 11 |

## How many amps does a 3 HP 3 phase motor draw?

AMP DRAW BASED ON HORSEPOWER

HP | 1 Phase Amps | 3 Phase Amps |
---|---|---|

115 volt | 575 volt | |

3 | 34 |
3.9 |

5 | 56 | 6.1 |

7-1/2 | 80 | 9 |

## How do you calculate full load amps on a 3 phase 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)

## How many amps can 3 phase handle?

For example, a three phase circuit using 25,000 watts of power and a line voltage of 250 will have a current flow of 25,000/(250 x 1.73), which is equal to **57.80 amperes**.

## How many amps does a 7.5 kW 3 phase motor draw?

Three Phase Motors

MOTOR RATING | HP | APPROX. F.L.C. AT LINE VOLTAGE |
---|---|---|

5.5 kW | 7.5 | 20 |

7.5 kW | 10 |
27 |

9.3 kW | 12.5 | 34 |

10 kW | 13.5 | 37 |

## How many amps does a 5 hp 3 phase motor draw?

These are only intended to be guidelines and in all cases the full load amps of the motor nameplate should be used for final calculations.

…

Here are the Full Load Amp (FLA) values for typical 230VAC and 480VAC 3 phase motors.

Motor horsepower | Full load amps 230VAC | Full load amps 460VAC |
---|---|---|

3 | 9 | 4.5 |

5 | 15 |
7.5 |

7.5 |
22 |
11 |

10 | 27 | 14 |

## 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 do you calculate the starting current of a 3 phase motor?

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 many amps are in a horsepower?

Make a fraction of these numbers and find the final horsepower to amps value, 746 / 165.6 = **4.505 A** . We round the outcome to four significant figures. In this case, a 1 hp motor to amps gives 4.505 A .

## Does a 200 amp 3 phase service equal a total of 600 amps?

Originally Answered: Does a 200 amp 3 phase service equal a total of 600 amps? **No**, because each one of the three phase wires is supplying amperage for only one third of the time. The power rotates very fast between those three wires, 60 times per second, so that enables the wires to be much smaller than normal.

## Is 3-phase amps per phase?

On a 3 phase 4 wire system at 220/380 volts, a load of 60KW total or 20kw per phase, MUST be about **100 amps per phase**. Therefore a measured phase current of 350 amps implies that the actual load must be a lot higher than 60kw.

## How do you size a 3-phase breaker?

For 3-phase loads, **you divide the VA by the nominal voltage and by the square root of three (approximately 1.732)**. If your total 3-phase load in a 480V system is 50,000VA, what size breaker do you need? 50,000VA ÷ (480V × 1.732) = 60.2A.

## Is a 3 pole breaker 3-phase?

Three pole circuit breakers

Factories, workshops and commercial facilities, often have a **3-phase electrical supply**. Three pole circuit breakers deliver 480VAC through three hot wires.