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Status of the circuit breaker
3.4 Status of the ETU
3WA Air Circuit Breaker Communication
18
System Manual, 11/2021, 92310000004-02
Number of tripping operations
Separate registers exist to indicate the number of individual tripping types.
Number of all tripping operations
0x0093
Number of GF tripping operations
0x0095
Number of INST tripping operations
0x0097
Number of LT tripping operations
0x0099
Number of residual current tripping operations
0x009B
Number of reverse power protection tripping operations 0x009D
Number of S / dST tripping operations
0x009F
3.4
Status of the ETU
The status of the ETU600 electronic trip unit can be indicated and evaluated in the "ETU
status" register.
Name
Register (0x0000 HEX)
ETU status
0x61DA
Description
Bit
Comment
ETU defective
0
Determine the cause of the error using
register 0x61DE "ETU error messages".
Overload alarm 1
1
Indicated by orange "AL" LED on ETU600.
Overload alarm AL1 can be set between
40 and 100% I
r
in register 0x61EB "Alarm
threshold AL1".
Overload alarm 2
2
Indicated by red "AL" LED on ETU600.
Momentary current ≧
100% I
r
.
Can result in LT overload tripping.
GF alarm
3
GF current can be read out in the associ-
ated I
GF
current.
Pre-alarm
5
Generates an alarm before a protection
tripping operation occurs.
A pre-alarm is available for the LT and N
characteristic curves.
Check ETU settings
6
ETU error detected, please contact Ser-
vice.
ETU in error-free operating mode
8
Equivalent of ETU sign-of-life contact.
Test mode
9
Not currently used.
DAS+ active
11
For more information, see section DAS+
status (Page 22). Parameter set B func-
tions according to the same principle as
DAS+.
Parameter set B active
13
ETU not calibrated
15
ETU error detected, please contact Ser-
vice.
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