Delta VFD300C43S-HS User Manual page 386

Chapter 12 Description of Parameter SettingsC2000-HS
 Setting 1:
When the operating point exceeds derating curve 1, the carrier frequency is fixed to the set value.
Select this mode if the change of carrier wave and motor noise caused by ambient temperature
and frequent overload are not acceptable. Refer to Pr.00-17.
Refer to Section 9-4 "Derating Curve of Ambient Temperature" for the derating level of the rated
current. Take VFD750C43A-HS for example, when the carrier frequency maintains at 15kHz, the
rated current decreases to 75%. The oL protection executes when the current is
120%*75%=90% for one minute; therefore, it must operate by the curve to keep the carrier
frequency.
 Setting 2:
The protection method and action are the same as setting it to 0, but this disables the current
limit when output current is the derating ratio ×160% (default value). The advantage is that this
can provide a higher starting output current when the carrier frequency setting is higher than the
default. The disadvantage is that the carrier wave derates easily when it overloads.
Example: when Pr. 06-55 = 0 or 1, over-current stall prevention level = ratio * Pr. 06-03. When Pr.
06-55 = 2, the over-current stall prevention level = Pr. 06-03.
 Use with the settings for Pr. 00-16 and Pr. 00-17.
 The ambient temperature also affects the derating; refer to Section 9-4 "Ambient Temperature
Derating Curve". Take VFD750C43A-HS for example, ambient temperature 50ºC, UL Open Type,
and independent installation. When the carrier frequency is set to 15kHz, it corresponds to 75%
of the rated output current. The ambient temperature 60ºC corresponds to 75% * 80% of the
rated output current.
PT100 Voltage Level 1

Settings
PT100 Voltage Level 2

Settings
 Condition settings: Pr. 06-57 > Pr. 06-56.
PT100 Level 1 Frequency Protection

Settings
PT100 Activation Level 1 Protection Frequency Delay Time

Settings
 PT100 operation instructions
(1) Use voltage type analog input (AVI, AUI, and ACI voltage 0–10 V) and select PT100 mode.
(2) Select one of the voltage type analog inputs below: (a) AVI (Pr. 03-00=11), (b) AUI (Pr.
03-02=11), or (c) ACI (Pr. 03-01=11 and Pr. 03-29=1).
(3) When selecting Pr. 03-01 = 11 and Pr. 03-29 = 1, you must switch SW4 to 0–10V for the
external I/O board.
(4) The AFM2 outputs constant voltage or current, then Pr. 03-23 = 23. You must switch AFM2
0.000–10.000 V
0.000–10.000V
0.0–1500.0 Hz
0–6000 sec.
12.1-06-20
Default: 5.000
Default: 7.000
Default: 0.0
Default: 60