## Table of the electric currents of a 3-phase motor

An electric motor has specifications: voltage is 380 V, 3 phase, frequency is 50 Hz, 1500 rpm, cos phi is 0.8 and real power on the name plate is 22 kW. Convert to HP (Horse Power) and calculate, how many current of electricity will flow into the motor?

:catat: Answer:

--> 22 kW ≈ 30 HP

:catat:

V = 380 V 3 fase

f = 50 Hz

Cos φ = 0.8

P = 22 kW = 22000 W

I = ...?

The formula of real power electricity in 3-phase:

--> I = 22000 / (√3 x 380 x 0.8)

--> I = 41.78 A

:catat:

For reference, here is a

Connection of 3-Phase Motor |

:catat: Answer:

`1HP = 0.75 kW`

--> 22 kW / 0.75 kW x 1 HP = 29.33 HP--> 22 kW ≈ 30 HP

:catat:

__The power of the motor is 30 HP__

V = 380 V 3 fase

f = 50 Hz

Cos φ = 0.8

P = 22 kW = 22000 W

I = ...?

The formula of real power electricity in 3-phase:

`P = √3 x V x I x Cos φ`

--> I = P / (√3 x V x Cos φ)--> I = 22000 / (√3 x 380 x 0.8)

--> I = 41.78 A

:catat:

__The current of electricity will flow into the motor is 41,78 A__

For reference, here is a

**table of the electric currents of a 3-phase motor, 380 V, cos phi 0.8**

kW | HP | A |
---|---|---|

0.4 | 0.5 | 0.8 |

0.75 | 1 | 1.4 |

1.1 | 1.5 | 2.1 |

1.5 | 2 | 2.8 |

2.2 | 3 | 4.2 |

3 | 4 | 5.7 |

3.7 | 5 | 7 |

4.5 | 6 | 8.5 |

5.5 | 7.5 | 10.4 |

7.5 | 10 | 14.2 |

9 | 12 | 17.1 |

11 | 15 | 20.9 |

15 | 20 | 28.5 |

18.5 | 25 | 35.1 |

22 | 30 | 41.8 |

30 | 40 | 57 |

37 | 50 | 70.3 |

45 | 60 | 85.5 |

55 | 75 | 104.5 |

75 | 100 | 142.4 |