Siemens SENTRON 3WA - 3.3 Indication of tripping cause

Status of the circuit breaker
3.3 Indication of tripping cause
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
17
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
Register (0x0000 HEX)
Last tripping cause
0x4EBB
Description
Bit
Comment
No tripping 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.
Test function
1
INST
2
ST
3
dST
4
LT
5
GF
6
RC
7
RP
8
Overvoltage
9
Undervoltage
10
Overfrequency
11
Underfrequency
12
Voltage unbalance
13
Current unbalance
14
Phase rotation
15
THD current
16
THD voltage
17
Power forward
18
Power reverse
19
ETU error
20
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.