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 318 for the differences between HD and ND. Specifications for
capacity ratings are listed on the following pages.
Table A.1 Selecting the Appropriate Load Rating
Setting
Parameter C6-01
Rated Output Current Overload Tolerance Default Carrier Frequency
0: Heavy Duty
HD Rating
varies by model
<1>
150% rated output current for 60 s
8/10 kHz
varies by model
1: Normal Duty
(default)
ND Rating
varies by model
<1>
120% rated output current for 60 s
varies by model
2 kHz, Swing PWM
<1> The following pages list information on rating changes based on drive model.
• 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.
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 ND (C6-01 = 1).
A.1 Heavy Duty and Normal Duty Ratings
318
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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