Altitude Derating - YASKAWA GA800 Series Technical Reference

Make sure that there is 2 mm (0.08 in) minimum of space between drives.
2 : IP20/NEMA Type 1/IP55
Derates the drive rated output current from "-10 °C to 40 °C 100%" to "40 °C 100%" to "50 °C 85%". Use this setting
to install IP55/UL Type 12 Heatsink External Mounting drives.
3 : Finless
Derates the drive rated output current from "-10 °C to 40 °C 100%" to "40 °C 100%" to "50 °C 85%". Use this setting
to install a finless drive.
A - L8-35 = 0
B - L8-35 = 2, L8-35 = 3
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Altitude Derating

Install the drive in a location that has an altitude of 1000 m (3281 ft) or lower.
Derate the output current by 1% for each 100 m (328 ft) to install the drive in altitudes between 1000 to 4000 m (3281
to 13123 ft).
It is not necessary to derate the rated voltage in these conditions:
• Installing the drive at 2000 m (6562 ft) or lower
• Installing the drive between 2000 to 4000 m (6562 to 13123 ft) and grounding the neutral point on the power
supply.
If you do not ground the drive with a neutral network, contact Yaskawa or your nearest sales representative.
YASKAWA SIEPC71061737B GA800 Drive Technical Reference
Figure 10.1 Derating Depending on Drive Installation Method
C - L8-35 = 1
10.7 Drive Derating
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