A distribution board rated at 63 amps 3 phase means that the maximum current you can draw from each of the three phases is 63 amps, but you do not multiply this by 3 for the total load. Instead, each phase can carry up to 63 amps independently.
Calculating the kW Load
To calculate the power (in kW) you can run on each phase, you can use the formula:
Power (kW)=Voltage (V)×Current (I)1000
For a three-phase system, the voltage can vary based on your location. In many regions, the standard line-to-line voltage is either 400V or 415V. Assuming a line-to-line voltage of 400V, the calculations per phase would be as follows:
- Per Phase Power Calculation:
– Current (I) = 63 A
– Voltage (V) = 400 V
Power (kW)=400V × 63A / 1000=25.2kW
This means you can run approximately 25.2 kW on each phase.
- Total Power for All Phases:
– Since there are three phases, the total power available would be:
Total Power (kW)=3×25.2kW=75.6kW
Summary
- Max current per phase: 63 A
- Power per phase: ~25.2 kW (at 400V)
- Total power for three phases: ~75.6 kW
https://www.quora.com/My-distribution-board-shows-63-amp-3-phase-Does-it-mean-I-will-get-63-3-amp-How-much-kW-load-can-I-run-on-each-phase-selector