Siemens Siprotec 7UM612 User Manual

2 Functions
174
7UM61 Manual
C53000-G1176-C127-3
2.28.2 Setting Notes
Measured Value
Monitoring
Measured value monitoring can be activated at address 8101 MEASURE. SUPERV ON
or OFF. In addition the sensitivity of measured value monitorings can be modified.
Default values are set at the factory, which are sufficient in most cases. If especially
high operating asymmetries in currents and/or voltages is to be expected for the ap-
plication, or if it becomes apparent during operation that certain monitoring functions
activate sporadically, then the setting should be made less sensitive.
Address 8102 BALANCE U-LIMIT determines the limit voltage (line–line), above
which voltage symmetry monitoring becomes effective (see also Voltage Symmetry
Monitoring figure)..
Address 8103 BAL. FACTOR U is the associated symmetry factor; i.e. the slope of
the symmetry characteristic curve (see also Voltage Symmetry Monitoring figure).
Address 8104 BALANCE I LIMIT determines the limit current, above which the
current symmetry monitor is effective (see also Current Symmetry Monitoring figure).
Address 8105 BAL. FACTOR I is the associated symmetry factor; i.e. the slope of
the symmetry characteristic curve (see also Current Symmetry Monitoring figure).
Address 8106 ΣI THRESHOLD determines the limit current above which the current
sum monitor (see also Current Sum Monitoring figure) is activated (absolute portion,
only relative to IN). The relative portion (relative to the maximum conductor current)
for activating the current sum monitor is set at address 8107 ΣI FACTOR.
Address 8108 SUM.thres. U determines the limit voltage above which current sum
monitoring becomes active (see also Current Sum Monitoring figure) (absolute com-
ponent, referred only to U
N
). The relative component for triggering the sum current
monitoring is set under address 8109 SUM.Fact. U.
Note
In power system data 1, the voltage earth path and its matching factor Uph / Udelta
were specified. Measured value monitorings will only function properly if the setting
there is correct.
Fuse Failure Moni-
toring
Measuring voltages failure detection will only be effective and available if address 180
FUSE FAIL MON. is configured to Enabled. If the function is not required Disabled
is set. The function can be turned 8001 or FUSE FAIL MON. under address ON 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.
www . ElectricalPartManuals . com

Siemens Siprotec 7UM612 Specifications

General

Brand	Siemens
Model	Siprotec 7UM612
Category	Relays
Language	English