How do you calculate three phase motor?

How many kW is 3phase?

The SQRT(3) is used as line voltage for 208V output is derived from using two hot conductors. For example, a 30A 3 phase unit outputting 208V would be 208 x 24 x SQRT(3)=8.6kW.

What is full load current of a 3 phase motor?

3 phase 415V, at 0.8 pf, 1 Hp motor full load current = 1.3 Amps. 1 Phase 230V, at 0.8 pf, 1 Hp motor full load current = 4 Amps.

What is the formula for 3 phase power?

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 many kW is 1kva?

kVA to kW Conversion Chart

kVA kW
875 kVA 700 kW
1,000 kVA 800 kW
1,125 kVA 900 kW
1,250 kVA 1,000 kW

Is kVA equal to kW?

The kW to kVA Formula:

Apparent power (kVA) x power factor (pf) = actual power (kW) e.g. 100 kVA x 0.8 = 80 kW. The formula for converting kW into kVA is: Actual power (kW) / power factor (pf) = apparent power (kVA)

How do you measure a breaker for a 3 phase motor?

Breaker size must be rated for a minimum of 125% of the full-load current of the motor it is protecting, rounded up to the next standard breaker size. For example, the full-load current of a 5 HP motor at 460V is 7.6 Amps. The breaker must be sized for 7.6 * 1.25 = 10 Amps .

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What is load current formula?

Calculating an Electrical Load in a Simple Circuit

Let Power = Voltage * Current (P=VI). Let Current = Voltage/Resistance (I=V/R).

How many amps does a 5 HP 3 phase motor draw?

AC Motor Full Load Amperes

HP 200 Volts 380-415 Volts
3 11 6.1
5 17.5 9.7
7.5 25.3 14
10 32.2 18