Setting Notes - Siemens SIPROTEC 7SK80 Manual
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Figure 2-51
Logic diagram of broken wire monitoring
2.10.1.7 Setting Notes
Measured Value Monitoring
The sensitivity of measured value monitor can be modified. Default values which are sufficient in most cases
are preset. If especially high operating asymmetries in the currents and/or voltages are to be expected during
operation, or if it becomes apparent during operation that certain monitoring functions activate sporadically,
then the setting should be less sensitive.
Address 8102 BALANCE V-LIMIT determines the limit voltage (phase-to-phase) above which the voltage
symmetry monitor is effective. Address 8103 BAL. FACTOR V is the associated symmetry factor; that is, the
slope of the symmetry characteristic curve.
Address 8104 BALANCE I LIMIT determines the limit current above which the current symmetry monitor is
effective. Address 8105 BAL. FACTOR I is the associated symmetry factor; that is, the slope of the symmetry
characteristic curve.
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
Functions
2.10 Monitoring Functions
167
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