A.1 Heavy Duty and Normal Duty RatingsThe capacity of the drive is based on two types of load characteristics: Heavy Duty (HD) andNormal Duty (ND).Refer to Selecting the Appropriate Load Rating on page 188 for the differences betweenHD and ND. Specifications for capacity ratings are listed on the following pages.Table A.1 Selecting the Appropriate Load RatingSettingParameterC6-01 Rated Output Current Overload Tolerance Default CarrierFrequency0: Heavy Duty HD Ratingvaries by model <1> 150% rated output current for 60 s 8/10 kHzvaries by model1: Normal Duty(default)ND Ratingvaries by model <1> 120% rated output current for 60 svaries by model 2 kHz, Swing PWM<1> The following pages list 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 with variable torque needs. The drive allowsthe user to select HD or ND torque depending on the application. Fans,pumps, and blowers should use ND (C6-01 = “1”), and other applicationsgenerally use HD (C6-01 = “0”).• Swing PWM: Swing PWM equivalent to a 2 kHz audible noise. Thisfunction 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, overloadcapacity, carrier frequency, and current limit. The default setting is for ND (C6-01 = 1).A.1 Heavy Duty and Normal Duty Ratings188 YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
