Which products are involved?
Frequency inverter 8200vector
What is the reaction?
DC braking takes place by injection either of a DC voltage or a DC current. When braking with DC current and exceeding a current threshold the chopper frequency is reduced to 2 kHz in order to provide the inverter with thermal protection.
a) In software version V1.3 this threshold is 12 % of rated current.
b) In SW V1.4 the following thresholds are evaluated depending on the chopper frequency set under C0018:
Chopper frequency:..............................4 kHz.....8 kHz....16 kHz
Rated current threshold
at which there is a reduction to 2 kHz:...100.%......70 %.....12 %
When does the problem occur?
When braking a motor without brake chopper and without magnetic noise in the motor.
Possible diagnoses?
None
Quick remedy/recommendations?
None
