A.6 Drive Derating Data
The drive can be operated at above rated temperature, altitude and default carrier frequency
by derating the drive capacity. For example,
a 10 amp continuous rated drive may be operated
at higher temperatures if it is only used to supply 8 amps continuous.
u
Temperature Derating
As the ambient temperature for the drive is increased above the drive specification the drive
should be derated. Additionally parameter L8-35 Installation Method Selection on page 195
should be set according to enclosure type and mounting method as illustrated in Figure A.1
on page 195.
n
Output Current Derating Due to Ambient Temperature
If the ambient temperature is above the drive specification or if drives are side-by-side
mounted in a cabinet, the parameters L8-12 and L8-35 must be set according to the installation
conditions. The output current is derated as shown in Figure A.1.
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.
40 to 60 40 °C
L8-35
Installation
Method
Selection
0: Disabled (standard installation)
1: Side-by-Side installation
2: IP20/NEMA Type 1
3: Finless/Fin Outside installation
0 to 2 0
40
50
0
30 35
50%
70%
80%
85%
100%
Drive
Rating
Ambient temp C
Parameter L8-12
o
Parameter L8-35 = 0 (IP20)
Parameter L8-35 = 2
(IP20/NEMA Type 1)
Parameter L8-35 = 1
(Side-by-side installation)
Parameter L8-35 = 3
(Finless/ Fin outside installation)
Figure A.1 Ambient Temperature and Installation Method Derating
A.6 Drive Derating Data
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
195
A
Specifications
2/6/2008-14:44
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