314 YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
A.6 Drive Derating Data
A.6 Drive Derating Data
Derating allows the drive to operate in conditions above the rated specifications, such as ambient temperature, altitude,
and default carrier frequency. Derating a drive with a rated output current of 10 A down to 8 A, for example, makes it
possible to run the same drive continuously at hotter temperatures.
◆ 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.
Figure A.1
Figure A.1 Carrier Frequency Derating
◆ 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 314 should be set according to enclosure type and
mounting method as illustrated in Figure A.2 on page 315.
■
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
Installation Method
Selection
0: Heatsink-Cooled Drive
1: Side-by-Side Mounting
2: NEMA Type 1 Drive
3: Finless Drive or External Heatsink Installation
0 to 3 0
Installation Type
<1> To use finless drive or external heatsink installation between –10 to 50°C without current derating,
Set L8-35 to 0
Ensure airflow of 0.5 m/s around the drive
Temperature Derating
Heatsink-Cooled Drive –10 to 50°C = 100%
NEMA Type 1 Drive –10 to 40°C = 100%. Derating from 100% at 40°C to 85% at 50°C.
Side-by-Side Mounting –10 to 30°C = 100%. Derating from 100% at 30°C to 70% at 50°C.
Finless Drive or External Heatsink Installation –10 to 35°C = 100%. Derating from 100% at 35°C to 80% at 50°C.
<1>
ND
10 (8)
15
0
HD
2
ND
10 (8)
15
0
HD
2
200 V Class:
80% of HD
400 V Class:
60% of HD
Carrier Frequency Derating
Drive Rated
Current
Carrier Frequency Selection (C6-02)
To Next Page
Loading...
