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Technical data
3
3 - 7
Siemens AG ⋅ May 1998
3.7 Ancillary functions
Table 3.8 Ancillary functions
Self-diagnosis functions Current monitoring per feeder
Auxiliary voltage monitoring
cyclic test
Check of the data transmission between master unit
and bay units
Memory tests
Operational measured values
Bay unit Feeder currents
range
tolerance
Differential and stabilizing currents of the check zone
range
Frequency
range
tolerance
L1
;
L2
;
L3
;
E
in A primary and in %
N
0 to 1ā000 %
N
typical2%ofmeasured value
dL1
;
dL2
;
dL3
sL1
;
sL2
;
sL3
0 to 1ā000 %
N
in Hz
N
" 5Hz
0,1 Hz
Master unit Feeder currents
range
tolerance
Differential and stabilizing currents of all bus sections
(separate for ZPS-BSZ1; ZPS-BSZ and ZPS-BSZ3)
range
L1
;
L2
;
L3
in %
N
0 to 1ā000 %
N
typical2%ofmeasured value
dL1
;
dL2
;
dL3
sL1
;
sL2
;
sL3
in %
N
0 to 1ā000 %
N
Event recording Storage of the last 99 operational events and 40 fault
events
Fault recording Storage time (from busbar TRIP or external initiation) -200 to +100 ms
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