Chapter 12 Description of Parameter SettingsCP2000
12.1-06-21
temperature, overload output current and time. If overloads are not frequent, and the concern is
only about the carrier frequency operating with the rated current for a long time, and changes to
the carrier wave due to short overload are acceptable, set to 0.
Refer to the Section 9-7 “Derating Curve of Ambient Temperature” for the level of carrier
frequency. Take VFD007CP43A in normal duty for example, ambient temperature 50°C, UL
open-type, and independent installation. When the carrier frequency is set to 15 kHz, it
corresponds to 72% of the rated output current. When the output current is higher than the 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 VFD007CP43A in normal duty for example, when the carrier frequency maintains
at 15 kHz, 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 x 160% of output current in normal load, and
derating ratio x 130% of output current in light load. 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.
Use with settings for Pr.00-16 and Pr.00-17.
PT100 Voltage Level 1
Default: 5.000
Settings 0.000–10.000 V
PT100 Voltage Level 2
Default: 7.000
Settings 0.000–10.000 V
Condition settings: Pr. 06-57 > Pr.06-56.
PT100 Level 1 Frequency Protection
Default: 0.00
Settings 0.00–599.00 Hz
PT100 Activation Level 1 Protection Frequency Delay Time
Default: 60
Settings 0–6000 sec.
PT100 operation instructions:
(1) Use voltage type analog input (AVI1, AVI2 and ACI voltage 0–10V) and select PT100 mode.
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