Fuji Electric FVR-E11S-7EN User Manual

8-4
8-3 Measurement of Electrical Amounts in Main Circuit
Because the voltage and current of the power supply (input) of the main circuit of the inverter and the
output (motor) include harmonic components, the indicated value varies according to the type of the
meter. Use meters indicated in Table 8-3-1 when measuring with meters for commercial frequencies.
Marketed power factor meters measuring phase difference between the voltage and current cannot
measure the power factor. To obtain the power factor, measure the power, voltage and current on each
of the input and output sides and calculate in the following formula.
In case of Three-phase In case of Single-phase
Power factor
Electric power[W]
3 Voltage[V] Current[A]
100[% =
× ×
× ]
Power factor
Electric power[W]
Voltage[V] Current[A]
100[% =
×
× ]
Table 8-3-1 Meters for measurement of main circuit
Input (power supply) side Output (motor) side Link voltage
(P(+)-N(-))
Item
Voltage Current Voltage Current
Name of
meter
Ammeter
A
R
,
S
,
T
Voltmeter
V
R
,
S
,
T
Wattmeter
W
R
,
S
,
T
Ammeter
A
U
,
V
,
W
Voltmeter
V
U
,
V
,
W
Wattmeter
W
U
,
V
,
W
DC voltmeter
V
Type of
meter
Moving iron
type
Rectifier or
moving iron
type
Digital
power
meter
Moving iron
type
Rectifier
type
Digital
power meter
Moving coil
type
Symbol of
meter
Note) When the output voltage is measured by a rectifier type, an error may be included. To increase the
accuracy, use a digital AC power meter.
Fig. 8-3-1
Connection of meters
(L1/L)
(L2/N)

Fuji Electric FVR-E11S-7EN Specifications

General

Brand	Fuji Electric
Model	FVR-E11S-7EN
Category	Inverter
Language	English