Hitachi NES1-004SB Quick Reference Manual page 286

13.2.2 Improvement of the derating
・Derating properties are improved by attaching optional FFM to an applicable model. Neither applicable
model needs the derating of the carrier frequency and the current derating at ambient temperature 50℃.
The detail refers to figure 5 ,6 and figure 7
Ambient Temp 40℃
8.0
(If I use FFM,
use is possible at ambient temp 50℃)
6.0
4.0
0 2 4
Carrier frequency(kHz)
Figure5．Derating of NES1-015SB
.
10 0
9.0
Ambient Temp40℃
8.0
7.0
6.0
5.0
4.0
0 2 4
Carrier frequency(kHz)
Figure7．Derating of NES1-040HB
13.2.3 Capacitor life improvement
・Bus capacitor life doubles approximately when I attach optional FFM to an applicable model.
The detail refers to figure 8
Ambient Temp(℃)
50
40
30
20
10
0 1
Ambient Temp 50℃
6 8 10 12 14
Ambient Temp50℃
6 8 10 12 14
2 3 4 5 6
Bus Capacitor Life (Year)
Figure 8.Carve of Bus Capacitor Life
.
10 0
9.0
Ambient Temp40℃
8.0
7.0
6.0
5.0
4.0
16
0 2
Figure6．Derating of NES1-022SB
(If I use FFM, use is possible
at ambient temp 50℃)
16
When I attach FFM and use it, be usable if it
is terms and conditions of 12 hours electricity
/ day , 80% of load factors even if ambient
temperature is high 10℃.
Be characteristic curves in case of 12 hours
electricity / day , 80% of load.
When I attach FFM and use it, a resistance
electrify time becomes the condition of 24
hours electricity / day.
10
7 8 9
13 - 57
Chapter 13 Option
Ambient Temp30℃
(If I use FFM,
use is possible at ambient temp 50℃)
Ambient Temp50℃
4 6 8 10 12
Carrier frequency(kHz)
14 16