Hitachi SH1 Series Basic Manual page 124

Chapter 7
7.4 Current derating(continue)
For using with carrier frequency over 2.1kHz, or when changing load ratings to LD/VLD, refer to current derating table as below.
Please use the inverter within the current range in
accordance with the derating tables of respective
models. If you use the inverter exceeding the derating
CAUTION range, note that the inverter may be damaged or its
lifespan may be shortened.
■SH1-05500-H(SH1-2500H)
600
550
500
450
400
ND:370A
350
300
250
200
0
■SH1-06600-H(SH1-3150H)
700
600
500
400
300
200
0
LD：550A
LD：395A
ND：500A
2 4
Carrier Frequency (kHz)
LD：660A
LD：395A
ND：600A
ND:370A
2 4
Carrier Frequency (kHz)
218A
6 8 10
6 8 10
7-11
Specifications
50℃：ND rating (normal duty rating)
45℃：LD rating (low duty rating)
230A
12
290A
218A
12