Monitoring And Protective Functions; Power Unit Protection, General - Siemens SINAMICS S120 Function Manual

Monitoring and protective functions

8.1

Power unit protection, general

SINAMICS power units offer comprehensive functions for protecting power components.
Table 8- 1 General protection for power units
Protection against:
Overcurrent
1)
Overvoltage
1)
Undervoltage
1)
Short-circuit
1)
Ground fault
Line phase-failure
detection
1)
The monitoring thresholds are permanently defined in the converter and cannot be changed.
1)
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Precautions
Monitoring with two thresholds:
First threshold exceeded
•
Second threshold exceeded
•
Comparison of DC-link voltage with
hardware shutdown threshold
Comparison of DC-link voltage with
hardware shutdown threshold
Second monitoring threshold checked
•
for overcurrent
Uce monitoring of IGBT modules
•
(chassis only)
Monitoring the sum of all phase currents
Responses
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
F30001 "Overcurrent" → OFF2
F30002 "Overvoltage" → OFF2
F30003 "Undervoltage" → OFF2
F30001 "Overcurrent" → OFF2
F30022 "Uce monitoring" → OFF2 (chassis only)
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.
F30011 "Line phase-failure in main circuit" →
OFF2
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