# How do you calculate three phase motor?

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## 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).