Fuji Electric FRENIC-Ace series - Output Circuit Filters (Ofls)

11.13 Output Circuit Filters (OFLs)
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11.13 Output Circuit Filters (OFLs)
Insert an OFL in the inverter power output circuit to:
• Suppress the surge voltage at motor terminals
This protects the motor from insulation damage caused by the application of high voltage surge currents from
the 400 V class series of inverters.
• Suppress leakage current from the output lines
This reduces the leakage current from long power feed lines. (The maximum wiring length must be 400 m.)
• Minimize radiation and induction noise from the output lines
An OFL effectively suppresses noise from long lines such as wiring at plants.
Output circuit filter (OFL)
Inverter
M
Motor
W
V
U
W
V
U
Z
Y
X
Figure 11.13-1 External View of Output Circuit Filter (OFL) and Connection Example
Table 11.13-1 Output Circuit Filter (OFL)
OFL--4A
Power supply
voltage
Nominal applied motor
(kW)
Filter type Rated current (A) Generated loss (kW)
Three-phase 400V
0.4
OFL-0.4-4A
1.5
80
0.75
OFL-1.5-4A 3.7 105
1.5
2.2
OFL-3.7-4A 9 210
3.7
5.5
OFL-7.5-4A 18 190
7.5
11
OFL-15-4A 30 320
15
18.5
OFL-22-4A 45 350
22
30 OFL-30-4A 60 570
37 OFL-37-4A 75 610
45 OFL-45-4A 91 810
55 OFL-55-4A 112 910
75 OFL-75-4A 150 1200
90 OFL-90-4A 176 1360
110 OFL-110-4A 210 1410
132
OFL-132-4A
253
1800
160
OFL-160-4A
304
2210
200 OFL-200-4A 377 2520
220 OFL-220-4A 415 2590
250
OFL-280-4A 520 3570
280
315 OFL-315-4A 585 3290
355 OFL-355-4A 650 3320