Can an excessively long output cable of the inverter cause the DC voltage to rise and the output power to decrease?
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There is a Siemens G150 low-voltage frequency converter on site, paired with a 160kW motor. The output cable is 800 meters long. During operation, an alarm was triggered due to an increase in DC voltage, and the output active power decreased. Please share your analysis, fellow engineers
160kw, 800m? Confirmed?
Wrong, sorry, it’s 300m
I’m not entirely sure either; you can try running the inverter without a load to see if there’s any alarm 300 meters is quite long too; how thick should the cable be?
Take a close look at the instructions; our company uses ABB frequency converters, and there have been warnings about cables being too long.
Has the inverter taken into account a di/dt filter? Is a dedicated shielded cable being used for the power cable connecting the inverter to the motor?