**Contents**show

## What size breaker do I need for a 30 hp motor?

Full-Load Current and Circuit Protection Data for Three-Phase AC Motors

Motor Horsepower | Breaker Size | |
---|---|---|

20 | 230 V 460 V | 100 50 |

25 | 230 V 460 V | 100 50 |

30 | 230 V 460 V | 125 70 |

40 | 230 V 460 V | 175 100 |

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

For three-phase, full load current for the resistive load is equal to the three-phase power divided by 1.732 times of voltage.

## How many amps does a 20 HP 3 phase motor draw?

AMP DRAW BASED ON HORSEPOWER

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

115 volt | 208 volt | |

10 | 100 | 30.8 |

15 | — | 46.2 |

20 | — | 59.4 |

## How much electricity does a 30 hp motor use?

30 HP rating is equivalent to 22.5 KW. Power consumption for 1 hour duration shall be 22.5 KWH.

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

Theoretically a 3hp single phase motor running at full load draws about 10 amps on 230 volt AC, and about double that on 110 volts AC. It uses this current regardless of how long it runs for.

## How many amps does a 30 hp motor draw at 480 volts?

AC Motor Full Load Amperes

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

30 | 92 | 40 |

40 | 120 | 52 |

50 | 150 | 65 |

60 | 177 | 77 |

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

Three Phase Motors

MOTOR RATING | HP | |
---|---|---|

4.0 kW | 5.5 | 8 |

5.5 kW | 7.5 | 11 |

7.5 kW | 10 | 15 |

9.3 kW | 12.5 | 18 |

## How do you calculate 3 phase load current?

For 3-phase systems, we use the following equation: kW = (V × I × PF × 1.732) ÷ 1,000. Again, assuming unity PF and solving this equation for “I,” you get: I = 1,000kW ÷ 1.732V.

## How do you calculate 3 phase current?

Three Phase Current – Calculation

- kW = kVA x pf.
- kVA = kW/pf.
- kVA = kW / power factor = 23/0.86 = 26.7 kVA (26700VA)
- Current = VA / voltage = 26700 / 230 = 116 A.
- V
_{LL}=√3 x V_{LN} - V
_{LN}= V_{LL}/ √3. - kVA = kW / power factor = 12 / 0.86 = 13.9 kVA (13900 VA)
- Current = VA / voltage = 13900 / 230 = 60 A.

## How many amps does a 50 HP 3 phase motor draw?

Full-Load Amps: Three-Phase Alternating-Current Motors

Induction-Type Squirrel Cage and Wound Rotor (Amperes) | ||
---|---|---|

HP | 115 Volts | 230 Volts |

40 | — | 104 |

50 | — | 130 |

60 | — | 154 |

## What size breaker do I need for a 3 phase motor?

For AC, 3 phase supply (400 /440 Volts) the rating of Breaker will be 6 Amps, 3 Pole or 4 Pole.

## What size breaker do I need for a 3 HP motor?

A 3 HP will be about 18amps. the circuit breaker for the 13 amps should be 20 amps. For the 3 HP the breaker should be 30 amps .

## How much electricity does a 25hp motor use?

25 HP = 18 65 KW. The motor, when running at full rated load, will consume 18.65 KW in one hour.

## How many units of electricity will be consumed if we run a 3 HP 3 phase motors for 24 hours?

3HP is equivalent to 2.24kW. If you run the motor in full load for 24 hours then total kWh will be 2.24*24= 53.76 kWh. So if full load condition the motor will consume 53.76 unit of electricity.

## How do you calculate the power consumption of a 3 phase motor?

Calculate the power the motor consumes while in operation. The equation is W = AV(sqrt 3) where A is amperes, V is volts, and sqrt 3 is the square root of 33 (about 1.73). W is the power consumption in watts. For example, if the electric motor uses 50 amps at 240 volts, the wattage is 50 x 240 x 1.73, or 20,760 watts.