Efficient Networks Siemens Sinamics S120 - Manual (Page 291)

Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
291
Monitoring and protective functions
8
8.1 Power unit protection, general
Description
SINAMICS power units offer comprehensive functions for protecting power components.
Table 8-1 General protection for power units
Protection against: Precautions Responses
Monitoring with two thresholds:
•
First threshold exceeded
A30031, A30032, A30033
Current limiting of a phase has responded.
The pulsing in the phase involved is inhibited.
If it is too frequently exceeded
F30017 –> OFF2
Overcurrent 1)
• Second threshold exceeded F30001 "Overcurrent" –> OFF2
Overvoltage 1) Comparison of DC link voltage with
hardware shutdown threshold
F30002 "Overvoltage" –> OFF2
Undervoltage 1) Comparison of DC link voltage with
hardware shutdown threshold
F30003 "Undervoltage" –> OFF2
• Second monitoring threshold checked
for overcurrent
F30001 "Overcurrent" –> OFF2 Short-circuit 1)
• Uce monitoring of IGBT modules
(chassis only)
F30022 "Uce monitoring" –> OFF2 (chassis only)
Ground fault Monitoring the sum of all phase currents After threshold in p0287 is exceeded:
F30021 "Power unit: ground fault"
--> OFF2
Note:
The sum of all phase currents is displayed in
r0069[6]. For operation, the value in p0287[1]
must be greater than the sum of the phase
currents when the insulation is intact.
Line phase failure
detection 1)
F30011 "Line phase-failure in main circuit" –>
OFF2
1) The monitoring thresholds are permanently defined in the converter and cannot be changed.