Electrical formulas, Er e – Generac Power Systems 91355 User Manual
Page 29
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
ELECTRICAL FORMULAS
TO FIND
KNOWN VALUES
1-PHASE
3-PHASE
KILOWATTS (kW)
Volts, Current, Power Factor
ExI
1000
E x l x 1 . 7 3 x P F
1000
KVA
Volts, Current
ExI
■ ■ 1000
ExI 1.73
1000
AMPERES
kW, Volts, Power Factor
k W x I O O O ■
E
k W x 1000
E
X
1.73
X
PF
WATTS
Volts, Amps, Power Factor
Volts
X
Amps
E
X
1
X
1.73
X
PF
NO. OF ROTOR
POLES
Frequency, RPM
. 2
X
60
X
Frequency
, RPM
2
X
60
X
Frequency
RPM
FREQUENCY
RPM, No. of Rotor Poles
RPMX-Roles
. 2
X
60
RPM
X
Poles
2 x 6 0
R P M
Frequency, No. of Rotor Poles
2
X
60
X
Frequency
Rotor Poles
2
X
60
X
Frequency
Rotor Poles
kW (required for
Motor)
Motor Horsepower, Efficiency
HP
X
0.746
Efficiency
HP
X
0.746
Efficiency
RESISTANCE
Volts, Amperes
E
1
E
1
VOLTS
Ohm, Amperes
IxR
IxR
AMPERES
Ohms, Volts
E
R
E
R
E = VOLTS
I = AMPERES
R = RESISTANCE (OHMS)
PF = POWER FACTOR
—
27
—