Fuji Electric FRN355VG1S-4J [1035/1046] 1 equivalent capacity

Fuji Electric FRN630VG1S-4J [1035/1046] 1 equivalent capacity
App. B
Japanese Guideline for Suppressing Harmonics for Customers Receiving High Voltage or Special High Voltage
A-17
App.
(4) Degree of harmonics to be calculated
The higher the degree of harmonics, the lower the current flows. This is the property of harmonics
generated by inverters so that the inverters are covered by "The case not causing a special hazard" of
the term (3) in the above Appendix for the 9th or higher degrees of the harmonics.
Therefore, "It is sufficient that the 5th and 7th harmonic currents should be calculated."
[ 3 ] Examples of calculation
(1) Equivalent capacity
Example of loads
Input capacity and
No. of inverters
Conversion factor Equivalent capacity
[Example 1] 400 V, 3.7 kW, 10 units
w/- AC reactor and DC reactor
4.61 kVA × 10 units K32 = 1.4
4.61 × 10 × 1.4
= 64.54 kVA
[Example 2] 400 V, 1.5 kW, 15 units
w/- AC reactor
2.93 kVA × 15 units K34 = 1.8
2.93 × 15 × 1.8
= 79.11 kVA
Refer to Table
B.2.
Refer to Table
B.3.
(2) Harmonic current every degrees
[Example 1] 400 V, 3.7 kW 10 units, w/- AC reactor, and maximum availability: 0.55
Fundamental current
onto 6.6 kV lines (mA)
Harmonic current onto 6.6 kV lines (mA)
5th
(38%)
7th
(14.5%)
11th
(7.4%)
13th
(3.4%)
17th
(3.2%)
19th
(1.9%)
23rd
(1.7%)
25th
(1.3%)
394 × 10 = 3940
3940 × 0.55 = 2167
823.5 314.2
Refer to Tables B.4 and
B.6.
Refer to Table B.5.
[Example 2] 400 V3.7 kW15 units, w/- AC reactor and DC reactor, and maximum availability: 0.55
Fundamental current
onto 6.6 kV lines (mA)
Harmonic current onto 6.6 kV lines (mA)
5th
(28%)
7th
(9.1%)
11th
(7.2%)
13th
(4.1%)
17th
(3.2%)
19th
(2.4%)
23rd
(1.6%)
25th
(1.4%)
394 × 15 = 5910
5910 × 0.55 = 3250.5
910.1 295.8
Refer to Tables B.4 and
B.6.
Refer to Table B.5.

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