Fuji Electric frenic mini series - Page 275

A-14
Table B.2 "Input Rated Capacities" of General-purpose Inverters Determined by the Applicable Motor Ratings
Applicable
motor rating
(HP)
1/2 1 2 3 5 7.5
230V 0.57 0.97 1.95 2.81 4.61 6.77
Pi
(kVA)
460V 0.57 0.97 1.95 2.81 4.61 6.77
(2) Values of "Ki (conversion factor)"
Depending on whether an optional ACR (AC reactor) or DCR (DC reactor) is used, apply the
appropriate conversion factor specified in the appendix to the guideline. The values of the conversion
factor are listed in Table B.3.
Table B.3 "Conversion Factors Ki" for General-purpose Inverters Determined by Reactors
Circuit
category
Circuit type
Conversion
factor Ki
Main applications
w/o reactor K31=3.4
x General-purpose
inverters
w/- reactor (ACR) K32=1.8
x Elevators
w/- reactor (DCR) K33=1.8
x Refrigerators, air
conditioning
systems
3
3-phase bridge
(capacitor
smoothing)
w/- reactors (ACR and DCR) K34=1.4
x Other general
appliances
Some models are equipped with a reactor as a built-in standard accessory.
(3) Exception to this guideline
Inverters whose inputs are 115V or 230V lines and capacities are 5 HP or less are an exception to this
guideline.
Those excluded inverters are already regulated by the "Japanese guideline for suppressing harmonics in
home electric and general-purpose appliances" so that all of them are not regulated by this guideline
regardless of the quantity of the units used by a single customer.
[ 2 ] Calculation of Harmonic Current
(1) Value of "input fundamental current"
- When you calculate the amount of harmonics according to Table 2 in Appendix of the Guideline, you have
to previously know the input fundamental current.
- Apply the appropriate value shown in Table B.4 based on the kW rating of the motor, irrespective of
the inverter type or whether a reactor is used.
If the input voltage is different, calculate the input fundamental current in inverse proportion
to the voltage.
Table B.4 "Input Fundamental Currents" of General-purpose Inverters Determined
by the Applicable Motor Ratings
Applicable motor rating
(HP)
1/2 1 2 3 5 7.5
230V 1.62 2.74 5.50 7.92 13.0 19.1 Input
fundamental
current (A)
460V 0.81 1.37 2.75 3.96 6.50 9.55
6.6 kV converted value
(mA)
49 83 167 240 394 579
㩷