388 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
A.1 Heavy Duty and Normal Duty Ratings
A.1 Heavy Duty and Normal Duty Ratings
The capacity of the drive is based on two types of load characteristics: Heavy Duty (HD) and Normal Duty (ND).
Refer to Selecting the Appropriate Load Rating on page 388 for the differences between HD and ND.
Table A.1 Selecting the Appropriate Load Rating
Note: Differences between HD ratings and ND ratings for the drive include rated input and output current, overload capacity, carrier
frequency, and current limit. The default setting is for HD (C6-01 = 0).
Setting Parameter C6-01
<1> Refer to Three-Phase 200 V Class Drives on page 389 and Three-Phase 400 V Class Drives on page 390 for information on rating changes
based on drive model.
Rated Output Current Overload Tolerance Default Carrier Frequency
0: Heavy Duty (default) HD Rating varies by model
<1> 150% rated output current for 60 s 2 kHz
1: Normal Duty ND Rating varies by model
<1> 120% rated output current for 60 s varies by model 2 kHz, Swing PWM
TERMS
TERMS
HD and ND: HD refers to applications requiring constant torque output, while ND refers to applications with variable torque
needs. The drive allows the user to select HD or ND torque depending on the application. Fans, pumps, and blowers should use
ND (C6-01 = 1), and other applications generally use HD (C6-01 = 0).
Swing PWM: Swing PWM equivalent to a 2 kHz audible noise. This function turns the motor noise into a less obtrusive white
noise.
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