Introduction
1.3 Characteristics
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
33
User-defined Functions
• Internal and external signals can be logically combined to establish user-defined logic functions.
• All common logic functions (AND, OR, NOT, Exclusive OR, etc.).
• Time delays and limit value interrogations.
• Processing of measured values, including zero suppression, adding a knee characteristic for a transducer
input, and live-zero monitoring.
Breaker Control
• Circuit breakers can be opened and closed manually via programmable function keys, via the system inter-
face (e.g. by SICAM or LSA), or via the operating interface (using a PC with DIGSI).
• Feedback information on circuit breakers states via the breaker auxiliary contacts.
• Plausibility monitoring of the circuit breaker position and monitoring of interlocking conditions for switching
operations.
Measuring Transducer
• If the 3 measuring transducers present in the unit are not needed by the protection functions, they can be
used to connect any type of analog signals (± 10 V, ± 20 mA).
• Threshold processing and logical linking of measurement signals possible.
Measurement Monitoring
• Increased reliability thanks to monitoring of internal measuring circuits, auxiliary power supply, hardware and
software.
• Current transformer and voltage transformer secondary circuits are monitored using symmetry checks.
• Trip circuit monitoring possible via external circuitry.
• Phase sequence check.
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