YASKAWA A1000

A.4 Drive Derating Data
YASKAWA ELECTRIC TOEP C710616 50B YASKAWA AC Drive - A1000 6-Phase/12-Pulse Input Installation Guide 57
A.4 Drive Derating Data
 Temperature Derating
To ensure the maximum performance life, the drive output current must be derated as shown in Figure A.1 when the drive
is installed in areas with high ambient temperature or if drives are mounted side-by-side in a cabinet. In order to ensure
reliable drive overload protection, set parameters L8-12 and L8-35 according to the installation conditions.
 Parameter Settings
IP00/Open-Chassis Enclosure
Drive operation between -10°C and 50°C allows 100% continuous current without derating.
Side-by-Side Mounting
Drive operation between -10°C and 30°C allows 100% continuous current without derating. Operation between 30°C and
50°C requires output current derating.
IP20/NEMA Type 1 Enclosure
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.
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.1
Figure A.1 Ambient Temperature and Installation Method Derating
 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.
No. Name Description Range Def.
L8-12
Ambient Temperature
Setting
Adjust the drive overload (oL2) protection level when the drive is
installed in an environment that exceeds its ambient temperature
rating.
-10 to 50 40°C
L8-35
Installation Method
Selection
0: IP00/Open-Chassis Enclosure
1: Side-by-Side Mounting
2: IP20/NEMA Type 1 Enclosure
3: Finless Drive or External Heatsink Installation
0 to 3 3
100
85
70
55
0
L8-35 = 2: IP20/NEMA Type 1 Enclosure
L8-35 = 3: External Heatsink lnstallation or
Finless Drive with C3 filter
L8-35 = 0: IP00/Open-Chassis Enclosure
30
-10
40
50
Drive Rating
(%)
L8-12
(Ambient temp: °C)
L8-35=1: Side-by-Side Mounting