Dc Reactors (Dcrs) (Built-In Or Bundled As Standard) - Fuji Electric FRENIC-HVAC User Manual

4.4.1.3

DC reactors (DCRs) (Built-in or bundled as standard)

The 230V class series inverters of 60 HP or below and 460V ones of 125 HP or below have a DCR
built-in as standard. The 230V class series inverter of 75 HP or above and 460V ones of 150 HP 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%.
Interphase voltage
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%.
Nominal
Power
applied
supply
motor
voltage
(HP)
75
Three-
phase 100
230 V
125
150
200
250
300
350
Three-
phase 450
460 V
500
600
800
900
1000
Note 1: Generated losses listed in the above table are approximate values that are calculated according to the
following conditions:
- The power supply is three-phase 200V/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.
Max.
unbalance ( %) =
Three
Table 4.7 DC Reactors (DCRs)
Inverter type DC reactor type
FRN075AR1S-2U DCR2-55C
FRN100AR1S-2U DCR2-75C
FRN125AR1S-2U DCR2-90C
FRN150AR1S-4U DCR4-110C
FRN200AR1S-4U DCR4-132C
FRN250AR1S-4U DCR4-160C
FRN300AR1S-4U DCR4-200C
FRN350AR1S-4U DCR4-220C
FRN450AR1S-4U DCR4-280C
FRN500AR1S-4U DCR4-355C
FRN600AR1S-4U DCR4-400C
FRN800AR1S-4U DCR4-500C
FRN900AR1S-4U DCR-630C
FRN1000AR1S-4U DCR-710C
4-41
voltage ( V) Min. voltage
- phase average voltage (
Rated current Inductance
(A) (mH)
256 0.080
358 0.050
431 0.042
261 0.166
313 0.148
380 0.122
475 0.098
524 0.087
649 0.069
833 0.054
938 0.048
1173 0.039
1477 0.031
1666 0.028
4.4 Options
( V)
× 67
V)
Generated loss
(W)
75
96
100
122
159
185
218
231
270
308
323
384
620
600