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 162 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 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). 162 SIEP C710606 33A OYMC AC Drive – J1000 User Manual Setting Parameter C6-01 Rated Output Current Overload Tolerance Default Carrier Frequency 0:
Heavy Duty (default) HD Rating varies by model 150% rated output current for 60 s 8/10 kHz varies by model 1: Normal Duty ND Rating varies by model 120% rated output current for 60 s varies by model 2 kHz, Swing PWM