Fuji Electric FRENIC-AQUA series, User Manual

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4.4 Options
4-35
Chap. 4
SEL
ECT
ING PE
RIPH
ER
AL
EQUI
PME
N
T
4.4.1.3 DC reactors (DCRs) (Built-in or bundled as standard)
Inverters of 90 kW or below have a DCR built-in as standard. Those of 110 kW or above have a DCR
bundled as standard, so be sure to connect it to the inverter in accordance with the reference wiring
diagram.
A DCR has the following effects.
„ For power supply matching
- Use a DCR when the capacity of a power supply transformer exceeds 500 kVA and is 10 times or
more the rated inverter capacity. In this case, the percent reactance of the power supply decreases,
and harmonic components and their peak value increase. These factors may break rectifiers or
capacitors in the converter section of inverter, or decrease the capacitance of the capacitor (which
can shorten the inverter's service life).
- Also use a DCR when there are thyristor-driven loads or when phase-advancing capacitors are
being turned ON/OFF.
- Use a DCR when the interphase voltage unbalance ratio of the inverter power supply exceeds 2%.
67 ×
V) ( voltage average phase - Three
V) ( voltage Min. V) ( voltage Max.
= %) ( unbalance voltage Interphase
„ For input power factor correction (for suppressing harmonics)
Generally a capacitor is used to improve the power factor of the load, however, it cannot be used in a
system that includes an inverter. Using a DCR increases the reactance of inverter's power supply so as
to decrease harmonic components on the power supply lines and improve the power factor of inverter.
Using a DCR improves the input power factor to approximately 86% to 95%.
Table 4.7 DC Reactors (DCRs)
Power
supply
voltage
Nominal
applied
motor
(kW)
Inverter type DC reactor type
Rated current
(A)
Inductance
(mH)
Generated loss
(W)
110 FRN110AQ1S-4 † DCR4-110C 261 0.166 122
132 FRN132AQ1S-4
†
DCR4-132C 313 0.148 159
160 FRN160AQ1S-4 † DCR4-160C 380 0.122 185
200 FRN200AQ1S-4 † DCR4-200C 475 0.098 218
220 FRN220AQ1S-4 † DCR4-220C 524 0.087 231
280 FRN280AQ1S-4 † DCR4-280C 649 0.069 270
315 FRN315AQ1S-4 † DCR4-315C 739 0.061 285
355 FRN355AQ1S-4 † DCR4-355C 833 0.054 308
400 FRN400AQ1S-4 † DCR4-400C 938 0.048 323
500 FRN500AQ1S-4
†
DCR4-500C 1173 0.039 384
630 FRN630AQ1S-4 † DCR-630C 1477 0.031 620
Three-
phase
400 V
710 FRN710AQ1S-4 † DCR-710C 1666 0.028 600
Note 1: A box (
†
) replaces an alphabetic letter depending on the shipping destination.
E (EU), A (Asia), or C (China)
Note 2: Generated losses listed in the above table are approximate values that are calculated according to the
following conditions:
- The power supply is three-phase 400 V 50 Hz with 0% interphase voltage unbalance ratio.
- The power supply capacity uses the larger of either 500 kVA or 10 times the rated capacity of the inverter.
- The motor is a 4-pole standard model at full load (100%).
- An AC reactor (ACR) is not connected.