Omron VARISPEED E7 User Manual page 160

Inverters in Protection Class IP00 and IP20 / NEMA 1 and Normal Duty 2
In the Normal Duty 2 mode the maximum carrier frequency is decreased compared to the Normal Duty 1
mode but the short term overload capability is increased. No further increase of the carrier frequency is possi-
ble. Refer to Fig 6.2 for the overload capability of both modes and to
with the Inverter Capacity (o2-04)
100
10
1
0.1
100 110
Fig 6.2
Inverters in Protection Class IP54
The default carrier frequency setting is 5kHz for all Inverters in protection class IP54. If the carrier frequency
is set to a higher value than the factory setting, the overload capability is reduced as shown in
IP54 Inverters the setting Heavy Duty 2 is not available.
120%
96%
72%
Fig 6.3 Overload Capability depending on Carrier Frequency (IP54)
for the carrier frequency default settings in Normal Duty 2
120 130 140 150
Overload Level [%]
Normal Duty 1
Normal Duty 1 and 2 Inverter Overload Detection Curve
400V class 22 to 55kW (IP54)
10 kHz
5 kHz
Carrier Frequency Selection
page 5-47, Factory Settings that Change
160 170 180
Normal Duty 2
400V class 7.5kW to 18.5kW (IP54)
15 kHz
Carrier Frequency
190 200
Fig 6.3. For
6-3