Kamis, 21 Juli 2011

RUMUS  DASAR  LISTRIK

● V = I x R  ( Volt ).
● P ( 1 phasa ) = V x I x cos φ = I² x R x cos φ ( Watt ).
● P ( 3 phasa )  =√3 x VL x IL x cos φ ( Watt ).

Keterangan :
● V = Tegangan ( Volt ) Æ misal : 220 volt.
● I  = Arus ( Ampere ).
●R = Resistance ( Ohm ).
● P = Daya ( Watt ).
● VL = Tegangan antar phasa ( volt ) Æ misal : 380 volt.
● IL  = Arus Line ( Ampere ).


Rumus Listrik

I = A (Ampere)
E = V (Voltase); 220 @ 1 Phase, or 380 @ 3 Phase
F = Fasa
PF or PE = Power Factor (0.8 atau 1)

kVA = A x V x SQRT(F) x 0.001

A = (kVA x 1000) / (SQRT(F) x V)


Watt = Volt . Ampere
1 kW = 1.25 kVA
1kVA = 0.8 kW

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