Altitude Derating - YASKAWA A1000 Technical Manual

A.6 Drive Derating Data
3: External Heatsink Installation, Finless Drive
Drive operation between -10C and 40C allows 100% continuous current without derating. Operation between 40C
and 50C requires output current derating.
Figure A.7
 Altitude Derating
The drive standard ratings are valid for an installation altitude up to 1000 m. If the altitude exceeds 1000 m both the drive
rated voltage and the rated output current must be derated for 1% per 100 m. The maximum altitude is 3000 m.
448
Drive Rating
(%)
100
85
70
55
L8-35=1: Side-by-Side Mounting
0
-10 30
Figure A.7 Ambient Temperature and Installation Method Derating
L8-35=0: IP00 Enclosure
L8-35=2: IP20/NEMA 1, UL Type 1 Enclosure
L8-35=3: External Heatsink lnstallation
L8-12
(Ambient temp: °C)
40 50
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual