Indication Of Tripping Cause - Siemens SENTRON 3WA System Manual

3.3

Indication of tripping cause

The cause of the last tripping operation of the circuit breaker is indicated in the register "Last
tripping cause".
Name
Last tripping cause
Description
No tripping
Test function
INST
ST
dST
LT
GF
RC
RP
Overvoltage
Undervoltage
Overfrequency
Underfrequency
Voltage unbalance
Current unbalance
Phase rotation
THD current
THD voltage
Power forward
Power reverse
ETU error
Information about the last tripping operation, e.g. tripping cause, tripping current, phase,
etc., can be read out of the trip log.
Note
The last tripping operation can be reset using the command "Reset last trip alarm", register
0x639C.
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
Register (0x0000 HEX)
0x4EBB
Bit Comment
0 Cyclic monitoring of this bit provides in-
formation about circuit breaker tripping.
This bit is set until the current tripping
operation has been reset.
If a tripping operation has occurred, the
other bits indicate the current tripping
cause.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Status of the circuit breaker
3.3 Indication of tripping cause
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