Stall overvoltage prevention
This function is used to prevent the frequency converter from overvoltage during
deceleration when the load is excessively heavy or the deceleration time is ex-
cessively short.
Code Name Setting range Default Min. Attri.
C0.25 Overvoltage prevention mode
1: Stall overvoltage protection en-
abled, resistor braking disabled
3: Stall overvoltage protection en-
abled, resistor braking enabled
3 – Stop
C0.26
Stall overvoltage prevention
level
1P 200 VAC: 300...390 V
3P 400 VAC: 600...785 V
385
770
0 Stop
With stall overvoltage prevention, the frequency converter detects the DC-bus
voltage and compares it with [C0.26] 'Stall overvoltage prevention level' during
deceleration:
● [DC-bus voltage] > [C0.26]: The output frequency stops deceasing
● [DC-bus voltage] < [C0.26]: The output frequency resumes decreasing
The typical behavior of stall overvoltage prevention is shown as the figure below:
Fig. 12-50: Stall overvoltage prevention during deceleration
If [C0.26] is too low, the deceleration process may fail.
Bosch Rexroth AG
Functions and Parameters
EFC x610 Series
200/389
DOK-RCON03-EFC-X610***-IT05-EN-P
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