Siemens SIPROTEC 7UM62, Manual

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Functions
250
7UM62 Manual
C53000-G1176-C149-3
Address
8108 SUM.thres. U
determines the voltage threshold above which the
summation voltage monitoring picks (see Figure 2-117) (absolute component,
referred only to U
N
). The relative component for pickup of the summation voltage
monitoring (Figure 2-117) is set at address
8109 SUM.Fact. U
.
Measuring Voltage
Failure Detection The measuring voltage failure monitoring is only effective and accessible if it has been
set during configuration of the protection functions at address
0180 FUSE FAIL
MON.
=
Enabled
. Set
Disabled
if the function is not required. Address
8001 FUSE
FAIL MON.
is used to switch the function
ON
or
OFF
.
The thresholds U
2
/U
1
≥
40 % and I
2
/I
1
≤
20 % for detecting 1-pole and 2-pole voltage
failures are fixed. The thresholds for detecting a 3-pole voltage failure (undervoltage
threshold = 10 V, below which the failure detection feature responds unless the
current changes significantly, and the differential current monitoring = 0.5 I
N
) are
likewise fixed and need not be set.
2.38.2.1 Settings
The following list indicates the setting ranges and the default settings of a I
N
= 1 A
secondary nominal current. For a secondary nominal current of I
N
= 5 A, these values
must be multiplied by 5. Consider the current transformer ratios when setting the
device with primary values.
Note:
In the power system data 1, the voltage earth path and its matching factor
Uph /
Udelta
have been specified. The measured value monitoring will only function
properly if the settings there are correct.
Addr. Setting Title Setting Options Default Setting Comments
8001 FUSE FAIL MON. OFF
ON OFF Fuse Failure Monitor
Addr. Setting Title Setting Options Default Setting Comments
8101 MEASURE.
SUPERV OFF
ON OFF Measurement Supervision
8102 BALANCE U-LIMIT 10..100 V 50 V Voltage Threshold for Balance
Monitoring
8103 BAL. FACTOR U 0.58..0.90 0.75 Balance Factor for Voltage
Monitor
8104 BAL. I LIMIT S1 0.10..1.00 A 0.50 A Current Balance Monitor Side 1
8105 BAL. FACT. I S1 0.10..0.90 0.50 Balance Factor for Current Moni-
tor S1
8106 BAL. I LIMIT S2 0.10..1.00 A 0.50 A Current Balance Monitor Side 2
8107 BAL. FACT. I S2 0.10..0.90 0.50 Balance Factor for Current Moni-
tor S2
8108 SUM.thres. U 10..200 V 10 V Summation Thres. for Volt.
Monitoring