Electrical formulas, Er e – Generac Power Systems 91355 User Manual
Page 29
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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
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