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
Carrier Frequency Derating
As the carrier frequency of the drive is increased above the factory setting the drive capacity should be derated according to
Figure A.1 .
ND
200 V Class:
80% of HD
10 (8)
15
0
Drive
Rating
Carrier (C6-02)
400 V Class:
60% of HD
HD
2
Carrier Frequency Derating
Figure A.1 Carrier Frequency Derating
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 Side-by-
Side Selection on page 290 should be set according to enclosure type and mounting method as illustrated in Figure A.2 on page 290.
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.2 .
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 Side-by-Side 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
Drive
Rating
Ambient temp C
Parameter L8-12
30
o
o
o
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)
35
o
50%
70%
80%
85%
100%
Figure A.2 Ambient Temperature and Installation Method Derating
u
Altitude Derating
Yaskawa recommends referencing two standards when considering altitude derating. These standards are:
• ANSI/IEEE C 37.40: Service Conditions and Definitions for High Voltage Fuses, Distributor Enclosed Single Pole Air Switches and Accessories
• IEC 282-1.2: High Voltage Fuse
A.6 Drive Derating Data
290
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)