YASKAWA Varispeed L7, Инструкция по эксплуатации, Страница: 132 / 243

Current Derating and Limitation related to the Carrier Frequency
5-
3
5
„ Current limit level
Varispeed L7 limits the output current at low frequencies. Current limit level that change with the inverter
capacity. The current limitation in the low frequency is as follows.
Fig 5.2 Low frequency current limitation
IMPORTANT
• If the torque at low frequencies is too low, check wheather the current runs into the limitation
explained above. If so, check the motor data settings (E2-
††
) and the V/f pattern (E1-
††
).
• If the current still runs into the limit it might be necessary to install a one size bigger inverter.
• When selecting an inverter please consider the low frequency current limit as described above and
select an inverter with an appropriate current margin.
• Check the Motor data settings to reduce the starting Current.
• If the starting current is bigger than the current limit, apply the bigger size inverter.
150%
6Hz
0
Output
Frequency
140%
200V Class 15kW
400V Class 30kW
130%
120%
110%
4.5Hz 3Hz 1.5Hz
200V Class11kW
200V Class 5.5kW
400V Class 3.7, 5.5, 7.5, 11, 55kW
200V Class 3.7, 18, 30kW
400V Class 18, 22kW
200V Class 7.5, 22 , 37, 45, 55kW
400V Class 4.0, 15, 37, 45kW
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