Delta C2000 Series User Manual page 513

Chapter 12 Description of Parameter SettingsC2000
Refer to Section 9-7 "Derating Curve of Ambient Temperature" for the level of carrier
frequency. Take VFD007C43A Normal Duty 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. When the output current is higher than this value, it
automatically decreases the carrier wave according to the ambient temperature, output current
and overload time. At this time, the overload capacity of the drive is still 120% of the rated
current.
 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 9-7 "Derating Curve of Ambient Temperature" for the derating level of the
rated current. Take VFD007C43A Normal Duty for example, when the carrier frequency
maintains at 15kHz, the rated current decreases to 72%. The oL protection executes when the
current is 120%*72%=86% 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 ×180% (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 9-7 "Ambient Temperature
Derating Curve". Take VFD007C43A Normal Duty for example, ambient temperature 50ºC, UL
Open Type, and independent installation. When the carrier frequency is set to 15kHz, it
corresponds to 72% of the rated output current. The ambient temperature 60ºC corresponds to
72% * 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
0.000–10.000 V
0.000–10.000V
0.00–599.00 Hz
12.1-06-21
Default: 5.000
Default: 7.000
Default: 0.00