How do you calculate 3 phase motor current?
How do you calculate 3 phase motor current?
If P is in kW, use this equation: amperage = 1000 × P / (1.73205 × V × cosΦ × η). If P is in hp, using this equation: amperage = 746 × P / (1.73205 × V × cosΦ × η). Substitute the corresponding values of your motor’s specifications to find the full load current in amperes.
How much current does a 3 phase motor draw?
Full Load Current: Three Phase AC Motors
| Motor Horsepower | Heater Ampere | |
|---|---|---|
| 1 | 230V 460 V | 4.830 2.415 |
| 1-1/2 | 230V 460V | 6.900 3.450 |
| 2 | 230V 460V | 7.820 3.910 |
| 3 | 230V 460V | 11.040 5.520 |
How many amps does a 7.5 kW 3 phase motor draw?
Three Phase Motors
| MOTOR RATING | HP | |
|---|---|---|
| 4.0 kW | 5.5 | 6 |
| 5.5 kW | 7.5 | 8 |
| 7.5 kW | 10 | 11 |
| 9.3 kW | 12.5 | 14 |
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 |
What is full load current of 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. Here power factor will be unity for resistive loads. Full load current I, I =P.
How do you calculate motor current?
Formula used in Motor full load current calculator
- 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 do you calculate full load amps on a 3 phase motor?
How do you calculate current load?
Calculating an Electrical Load in a Simple Circuit Let Power = Voltage * Current (P=VI). Let Current = Voltage/Resistance (I=V/R). Apply Kirchoff’s Second Law, that the sum of the voltages around a circuit is zero. Conclude that the load voltage around the simple circuit must be 9 volts.
How is electric current calculated?
Ohms Law and Power
- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)