Fuji Electric FRENIC-Ace series, Руководство пользователя

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Appendix B Japanese Guideline for Suppressing Harmonics by Customers Receiving High
Voltage or Special High Voltage (General-purpose inverter)
Appendix-14
(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
3
Three-phase bridge
(Capacitor smoothing)
w/o a reactor K31=3.4

General-purpose inverter
w/- a reactor (ACR) K32=1.8

Elevator
w/- a reactor (DCR) K33=1.8

Cold air refrigerating machine
w/- reactors (ACR and DCR) K34=1.4

Other equipment in general
Some models are equipped with a reactor as a standard accessory.
[ 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 (kW) 0.4 0.75 1.5 2.2 3.7 5.5 7.5 11 15 18.5
Input fundamental
current (A)
200V 1.62 2.74 5.50 7.92 13.0 19.1 25.6 36.9 49.8 61.4
400V 0.81 1.37 2.75 3.96 6.50 9.55 12.8 18.5 24.9 30.7
6.6 kV converted value (mA) 49 83 167 240 394 579 776 1121 1509 1860
Applicable motor rating (kW) 22 30 37 45 55 75 90 110 132 160
Input fundamental
current (A)
200V 73.1 98.0 121 147 180 245 293 357
400V 36.6 49.0 60.4 73.5 89.9 123 147 179 216 258
6.6 kV converted value (mA) 2220 2970 73.5 4450 5450 7450 8910 10850 13090 15640
Applicable motor rating (kW) 200 220 250 280 315 355 400 450 500 630
Input fundamental
current (A)
200V
400V 323 355 403 450 506 571 643 723 804 1013
6.6 kV converted value (mA) 19580 21500 24400 27300 30700 34600 39000 43800 48700 61400
(2) Calculation of harmonic current
Usually, calculate the harmonic current according to the Sub-table 3 “Three-phase bridge rectifier with the
smoothing capacitor” in Table 2 of the Guideline’s Appendix. Table B-5 lists the contents of the Sub-table 3.
Table B-5 Generated Harmonic Current (%), 3-phase Bridge Rectifier (Capacitor Smoothing)
Degree 5th 7th 11th 13th 17th 19th 23rd 25th
w/o a reactor 65 41 8.5 7.7 4.3 3.1 2.6 1.8
w/- a reactor (ACR) 38 14.5 7.4 3.4 3.2 1.9 1.7 1.3
w/- a reactor (DCR) 30 13 8.4 5.0 4.7 3.2 3.0 2.2
w/- reactors (ACR and DCR) 28 9.1 7.2 4.1 3.2 2.4 1.6 1.4

ACR: 3%

DCR: Accumulated energy equal to 0.08 to 0.15 ms (100% load conversion)

Smoothing capacitor: Accumulated energy equal to 15 to 30 ms (100% load conversion)

Load: 100%
100
(%) current harmonic nth Generated
(A) current l Fundamenta (A) current harmonic nth × =