A.4 Derating Data
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
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A.4 Derating Data
The regenerative unit can be operated above the rated temperature, altitude, and default carrier frequency by derating the
unit capacity.
◆
Temperature Derating
To ensure the maximum performance life, the regenerative unit output current must be derated as shown in
when the regenerative unit is installed in areas with high ambient temperature or if regenerative units are mounted
side-by-side in a cabinet. In order to ensure reliable overload protection, set parameters L8-35 according to the
installation conditions.
■
Parameter Settings
If the ambient temperature is higher than the rating or if regenerative units are installed side by side in the control panel,
you must set the L8-12 and L8-35 parameters according to the installation conditions. Derate the output current
according to
Setting 0: IP00 Open Type Enclosure
Regenerative unit operation between -10
°
C and +50
°
C allows 100% continuous current without derating.
Setting 1: Side-by-Side Mounting
Regenerative unit operation between -10
°
C and +30
°
C allows 100% continuous current without derating. Operation
b30
°
C and +50
°
C requires output current derating.
Setting 2: IP20/NEMA Type 1 Enclosure
Regenerative unit operation between -10
°
C and +40
°
C allows 100% continuous current without derating. Operation
b40
°
C and +50
°
C requires output current derating.
Setting 3: External Heatsink Installation
Regenerative unit operation between -10
°
C and +40
°
C allows 100% continuous current without derating. Operation
b40
°
C and +50
°
C requires output current derating.
Figure A.1
Figure A.1 Ambient Temperature and Installation Method Derating
◆
Altitude Derating
Standard ratings are valid for installation altitudes up to 1000 m. For installations from 1000 m to 3000 m, the
regenerative unit rated voltage and the rated output current must be derated by 1% per 100 m.
No.
Name
Description
Setting Value
Default Setting
L8-12
Ambient Temperature
Setting
Adjust the Overload (oL2) protection level when the
regenerative unit is installed in an environment that
exceeds its ambient temperature rating.
-10 to +50
+40
°
C
L8-35
Installation Method
Selection
0: IP00 Open Type Enclosure
1: Side-by-Side Mounting
2: IP20/NEMA Type 1 Enclosure
3: External Heatsink Installation
0 to 3
Default setting is
determined by o2-04
(Unit Model
Selection).
100
85
70
55
0
L8-35=2: IP20/NEMA Type 1 Enclosure
L8-35=3: External Heatsink Installation
L8-35=0: IP00 Open Type Enclosure
30
-10
40
50
L8-12
(Ambient temp: °C)
L8-35=1: Side-by-Side Mounting
Rated Current
(%)
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