Siemens SENTRON 3WA User Manual

Status of the circuit breaker
3.9 Status of alarms
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
25
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
Register (0x0000 HEX)
Circuit breaker alarm status
0x4EC1
Description
Bit
Overload alarm 1 in L1
0
Overload alarm 1 (AL1) active.
Overload alarm 1 (0x61EB) can be set in
the range 40 … 100% I
r
Overload alarm 1 in L2
1
Overload alarm 1 in L3
2
Overload alarm 1 in N
3
Overload alarm 2 in L1
4
Overload alarm 2 (AL2) active.
Current in a phase or neutral conductor
≥ 100% I
r of the overload protection.
Overload alarm 2 in L2
5
Overload alarm 2 in L3
6
Overload alarm 2 in N
7
Ground fault GF alarm REF
8
Ground-fault current greater than the
threshold set for the respective ground-
fault current.
Ground fault GF alarm UREF
9
Ground fault GF alarm UREF
10
Ground fault GF alarm UREF
11
Ground fault GF alarm REF
12
Ground fault GF alarm REF
13
Pre-alarm PAL in L1
19
Pre-alarm (PAL) active
Pre-alarm PAL in L2
20
Pre-alarm PAL in L3
21
Pre-alarm PAL in N
22
The following parameters are available for the pre-alarm, separately for parameter sets A
and B:
LT pre-alarm current setting Ir PAL PS-A
0x177D
LT pre-alarm delay time tr PAL PS-A
0x177F
LT N pre-alarm current setting IN PAL PS-A
0x1781
LT overload pre-alarm PAL ON/OFF PS-A
0x1783
LT pre-alarm current setting Ir PAL PS-B
0x1798
LT pre-alarm delay time tr PAL PS-B
0x179A
LT N pre-alarm current setting I
N
PAL PS-B
0x179C
LT overload pre-alarm PAL ON/OFF PS-B
0x179E

Siemens SENTRON 3WA Specifications

General

Brand	Siemens
Model	SENTRON 3WA
Category	Circuit breakers
Language	English