Monitoring And Protective Functions - Siemens SINAMICS S120 Installation And Start-Up Manual

Basic Information about the Drive System

Monitoring and protective functions

7.9 Monitoring and protective functions
7.9.1 Protecting power components: general
Description
SINAMICS power sections offer comprehensive functions for protecting power
components.
Table 7-13 General protection for power sections
Protection against
1)
Overcurrent
1)
Overvoltage
1)
Undervoltage
1)
Short-circuit
Ground fault
Line phase-failure
1)
detection
1)
The monitoring thresholds are defined permanently in the converter and cannot be changed.
7-262
Protective measures
Monitoring with two thresholds:
S
First threshold exceeded
S
Second threshold exceeded
Comparison of DC link voltage with
hardware shutdown threshold
Comparison of DC link voltage with
hardware shutdown threshold
S
Second monitoring threshold
checked for overcurrent
S
Uce monitoring for IGBT module
(chassis only)
Monitoring the sum of all phase
currents
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Responses
A30031, A30032, A30033
Current limitation of phase
activated.
Pulsing in the phase in question is
inhibited for one pulse period.
F30017 –> OFF2 is triggered if the
threshold is exceeded too often.
F30001 "Overcurrent" –> OFF2
F30002 "Overvoltage" –> OFF2
F30003 "Undervoltage" –> OFF2
F30001 "Overcurrent" –> OFF2
F30022 "Monitoring Uce" –> OFF2
(chassis only)
After threshold in p0287 is
exceeded:
F30021 "Power section: 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
E Siemens AG, 2004. All rights reserved