Temperature Derating - YASKAWA L1000A Technical Manual

Figure A.11

◆ Temperature Derating

To ensure the maximum performance life, the drive output current must be derated as shown in
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
No. Name
L8-12 Ambient Temperature Setting
L8-35
Installation Method Selection
IP00 Enclosure
Drive operation between -10°C and 50°C allows 100% continuous current without derating.
IP00 Enclosure with Top Protective Cover
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.12
◆ Altitude Derating
The drive standard ratings are valid for an installation altitude up to 3000 m (9842 ft.). If the altitude exceeds 1000 m
(3280 ft.). both the drive rated voltage and the rated output current must be derated for 1% per 100 m (328 ft.). The
maximum altitude is 3000 m (9842 ft.).
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Drive Rated
87% of Drive Rated
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Figure A.11 Carrier Frequency Derating (CIMR-LU50200)
Adjust the drive overload (oL2) protection level when the drive is installed in an environment
that exceeds its ambient temperature rating.
0: IP00 Enclosure
2: IP00 Enclosure with Top Protective Cover
Drive Rating
(%)
100
85
0
-10
Figure A.12 Ambient Temperature and Installation Method Derating
5 0200
0 3 kHz 5 kHz
Description
L8-35=0 : IP00 Enclosure
L8-35=2 : IP20/NEMA 1, UL Type 1 Enclosure
L8-12
(Ambient temp : °C)
40 50
A.6 Drive Derating Data
Figure A.12 when the
Range Def.
-10 to 50 40°C
Determined by
0 or 2
o2-04
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389
A