90
Chapter 6. Function Description (FUN)
Load Current (%)
Trip Time
1 minute
FUN_55
FUN_56
[ETH 1min]
[ETH cont]
[Motor i
2
t Characteristic Curve]
l
The motor protection is possible by calculating and accumulating I
2
t even in load variation and
frequent run/stop.
6.4.7 Inverter
switching frequency select
1) FUN_57 (Inverter switching frequency select)
This parameter affects the audible sound of the motor, noise emission from the inverter, inverter
termperature, and leakage current. If the ambient temperature where the inverter is installed is high or
other equipment may be affected by potential inverter noise, set this value lower. (setting range:
2.5 ~ 10.0
kHz).
Code
LCD display
Description
Setting range
Unit
Factory
setting
FUN_57
PWM Freq
Switching frequency select
2.5~10.0
kHz
8.0
l
Continuous Operation Derating Information
The above graph is only applied when the inverter is operated in the allowable temperature.
Pay attention to the air cooling when the inverter is installed in a panel box, and the inside temperature
should be within an allowable temperature range. This derating curve is based on inverter current rating
when rated motor is connected.
1kH
10kHz
100%
85%
8kHz
Switching Frequency
Output Current