'(& )( )'& &) ( &!& ")& &$(( $# Ć %&( $# #)" &&#$
6 - 30
Siemens AG ⋅ May 1998
The following table shows a list of events (F-No.)
which cause the collective alarm "Failure with/wiĆ
thout protection block".
Table 6.6 Collective alarms "Failure with/without protection block"
Event name Collective alarms "Failure with/without protection block"
Isolator failure (device failure, run-time failure)
Isolator failure auxiliary voltage missing
Reaction depends on setting of the parameter
DA 6302/ZE
Diff current supervision busbar
Diff current supervision check-zone
Reaction depends on setting of the parameter
DA 6307/ZE
Reaction depends on setting of the parameter
DA 6308/ZE
Measured value supervision
15-V-supervision FE
0-V-supervision FE
15-V-supervision CU
24-V-supervision CU
"Failure with protection block"
Failure during protection test Reaction depends on setting of the parameter
DA 6312/ZE
6.2.8 Measured values for commissioning -
blocks 74, 75, 76, 78
During commissioning the correct polarity of the curĆ
rent transformers must be checked. For this meaĆ
surement, the bus-section specific differential and
stabilizing currents are required.
Blocks 7400/ZE, 7500/ZE and 7600/ZE allow display
of the currents. The differential currents are displayed
as rms values and the stabilizing currents as average
values (rms value = 1.11 x average value for sinusoiĆ
dal measured currents).
Y
B
7 4 0 0 A N N U N C :
D I / S T c u r r C Z ?
Measured values of the check zone (ZPS-BSZ1)
"
A
7 4 0 1 I d C k z L 1
= 0 % I / I n o
Differential current in relation to the normalized nomiĆ
nal
no
for phase L1
The differential currents of the other phases are avaiĆ
lable under separate addresses DA 7403 (L2) and DA
7405 (L3)
"
A
7 4 0 2 I s C k z L 1
= 0 % I / I n o
Stabilizing current for phase L1
DA 7404 (L2)
DA 7406 (L3)
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