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 288
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
(default)
HD Rating
varies by model
<1>
150% rated output current for 60 s
8/10 kHz
varies by model
1: Normal Duty
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.
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.
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).
A.1 Heavy Duty and Normal Duty Ratings
288
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23
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