This tool calculates power from current or current from power in three-phase (3-phase) and single-phase systems. It is useful for selecting cables and switches for fan, pump and burner motors in the boiler room.
Formulas
Three-phase: P = √3 · U · I · cos φ S = √3 · U · I Q = S · sin φ
Single-phase: P = U · I · cos φ
Single-phase: P = U · I · cos φ
On motors, the power on the nameplate is the shaft power; enter the motor efficiency from the advanced settings to find the power drawn from the mains.
Example
A load drawing 100 A in a 400 V three-phase network, with cos φ = 0.85, has an active power of 58.9 kW and an apparent power of 69.3 kVA. A 75 kW load (cos φ 0.86) draws a current of approximately 126 A at 400 V.
Use compensation calculation to improve the power factor. You can consult Çiftel Kazan engineers for your boiler room and installation project.