Rockwell Automation 1336E IMPACT Adjustable Frequency AC Drive User Manual V 1-4.XX - Manual (Page 398)

D-8 Derating Guidelines
Due to drive losses, the output voltage to the motor is affected by the
AC input voltage to the drive. This reduced motor voltage may
require more motor torque, and therefore current, to achieve rated
motor horsepower. Though most applications do not require full rated
motor horsepower at full speed, the following information is provided
to assist with proper motor/drive selection.
1. For 460V motors, operate with a minimum 480V Input AC line voltage.
2. Size the motor with the capability to operate with 8% more current.
3. Purchase a motor designed to operate at 440V.
Figure D.40
All Drive Ratings
Figure D.41
Required Only for the following drives:
1336E-A/B/C-025 - 18.5 kW (25 HP) at 8 kHz
1336E-A/B/C - 22 kW (30 HP) at 6-8 kHz
1336E-A/B/C - 45 kW (60 HP) at 6 kHz
1
Figure D.42
Drive Ratings
% of Drive
Rated Amps
Altitude
2000
(6600)
0
80%
90%
100%
1000
(3300)
3000
(9900)
4000
(13200)
m
(ft)
% of Drive
Rated Amps
Input Voltage
+4% 240, 480, or 600V
Nominal
80%
90%
100%
+2% +6% +8% +10%
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 105% 110% 115% 120% 125% 130% 135% 140% 145% 150%
20%
40%
60%
80%
100%
120%
0%
Line Derating
Speed
%