Delta C2000 Series User Manual page 374

Setting 1:
It is used for the fixed carrier frequency and prevents the carrier wave changes and motor
noise caused by the surrounding temperature and frequent overload.
Refer to the following for the derating level of rated current. Take VFD007C43A in normal
duty as example, when the carrier frequency keeps in 15kHz and the rated current is decreased to
72%, it will have OL protection when the current is 120%*72%=86% for a minute. Therefore, it
needs to operate by the curve to keep the carrier frequency.
Setting 2:
It sets the protection method and action to 0 and disables the current limit for the Ratio*160%
of output current in the normal duty and Ratio*180% of output current in the heavy duty. The
advantage is that it can provide higher output current when the setting is higher than the factory
setting of carrier frequency. The disadvantage is that it decreases carrier wave easily when
overload.
It should be used with Pr. 00-16 and Pr.00-17 for setting.
Ambient temperature will also affect the derating, please refer to ambient temperature derating
curve.
General Control Derating Curve (Pr00-10=1 and Pr0011=0~3)
In Normal Duty mode (Pr.00-16=0)
Pr.06-55=1
Pr.06-55=0 or 2
(50 : UL open-type)
(40 :UL type1 or open type side by side)
460V
110
100
90
80
70
60
4 5 6 7 8
Fc (kHz)
Chapter 12 Description of Parameter Settings C2000 Series
VFD007~150C43A/E
VFD185~550C43A/E
VFD370~450C43S/U
VFD750~4500C43A/E
9 10 11 12 13 14 15
12-06-21
Pr.06-55=1
Pr.06-55=0 or 2
(50 : UL open-type)
(40 :UL type1 or open type side by side)
230V
110
100
90
80
70
60
4 5 6 7 8 9 10 11 12 13 14 15
Fc (kHz)
VFD007~110C23A
VFD150~370C23A;
VFD300~370C23E
VFD450~900C23A/E