A.1 Heavy Duty and Normal Duty RatingsThe capacity of the drive is based on two types of load characteristics: Heavy Duty (HD) and Normal Duty (ND).Refer to the following table for the differences between HD and ND.Table A.1 Selecting the Appropriate Load RatingSetting ParameterC6-01 Rated Output Current Overload Tolerance Default Carrier Frequency0: Heavy Duty HD Rating varies by model <1> 150% rated output current for 60 s 2 kHz1: Normal Duty(default) ND Rating varies by model <1> 120% rated output current for 60 s varies by model 2 kHz, Swing PWM<1> Refer to Power Ratings on page 163 for information on rating changes based on drive model.TERMSTERMS • HD and ND: HD refers to applications requiring constant torque output, while ND refers to applications withvariable 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 lessobtrusive white noise.Note: Differences between HD ratings and ND ratings for the drive include rated input and output current, overload capacity, carrier frequency, andcurrent limit. The default setting is for ND (C6-01 = 1).A.1 Heavy Duty and Normal Duty Ratings162 YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
