Status Of Alarms - Siemens SENTRON 3WA System Manual

3.9

Status of alarms

Alarms inform the user that LT or GF protection tripping may occur in the circuit breaker. In
these fault current ranges, promptly reducing the fault currents can prevent a protection
tripping operation.
Active alarms can be indicated and evaluated in the "Circuit breaker alarm status" register.
Name
Circuit breaker alarm status
Description
Overload alarm 1 in L1
Overload alarm 1 in L2
Overload alarm 1 in L3
Overload alarm 1 in N
Overload alarm 2 in L1
Overload alarm 2 in L2
Overload alarm 2 in L3
Overload alarm 2 in N
Ground fault GF alarm REF
Ground fault GF alarm UREF
Ground fault GF alarm UREF
Ground fault GF alarm UREF
Ground fault GF alarm REF
Ground fault GF alarm REF
Pre-alarm PAL in L1
Pre-alarm PAL in L2
Pre-alarm PAL in L3
Pre-alarm PAL in N
The following parameters are available for the pre-alarm, separately for parameter sets A
and B:
LT pre-alarm current setting I
LT pre-alarm delay time t
LT N pre-alarm current setting I
LT overload pre-alarm PAL ON/OFF PS-A
LT pre-alarm current setting I
LT pre-alarm delay time t
LT N pre-alarm current setting I
LT overload pre-alarm PAL ON/OFF PS-B
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
19
20
21
22
PAL PS-A
r
PAL PS-A
r
PAL PS-A
N
PAL PS-B
r
PAL PS-B
r
PAL PS-B
N
Status of the circuit breaker
3.9 Status of alarms
Register (0x0000 HEX)
0x4EC1
Overload alarm 1 (AL1) active.
Overload alarm 1 (0x61EB) can be set in
the range 40 ... 100% I
r
Overload alarm 2 (AL2) active.
Current in a phase or neutral conductor
≥ 100% I of the overload protection.
r
Ground-fault current greater than the
threshold set for the respective ground-
fault current.
Pre-alarm (PAL) active
0x177D
0x177F
0x1781
0x1783
0x1798
0x179A
0x179C
0x179E
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