Motor Derating; Altitude Derating For Yaskawa Drive - YASKAWA V1000 Series Installation & Start-Up Manual

A.6 Drive Derating Data
positive pressure in an enclosed cabinet with forced air cooling or an air-conditioning system. In
such a case, derating is required.
Figure A.3

Motor Derating

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Consult the motor manufacturer for the applicable altitude de-rating factor before applying
the motor. As a general guideline, consult the NEMA standard MG 1-14.04 (Operation of
AC and DC Fractional- and Integral-HP Motors and Generators at Altitudes Above 3,300
feet (1000 meters). However, the motor manufacturer's specific de-rating data is always
preferable.
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Figure A.3 Altitude Derating for Yaskawa Drives
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual