Siemens SIPROTEC 4 7SD80, Manual

Page: 28 / 416

Command Processing
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Switching devices can be opened and closed manually using control keys, programmable function keys,
via port B (e.g. of SICAM or SCADA), or via the user interface (using a personal computer and the DIGSI
operating software)
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Feedback of the circuit-breaker states via the breaker auxiliary contacts (for commands with feedback)
•
Plausibility monitoring of the circuit-breaker positions and interlocking conditions.
Commissioning; Operation; Maintenance
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Indication of the local and remote measured values according to magnitude and phase angle
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Indication of the calculated differential and restraint currents
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Indication of the measured values of the communication connection, as runtime and availability
Additional Functions
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Battery-buffered clock which can be synchronized via a synchronization signal (DCF77, IRIGB via satellite
receiver), binary input or system interface
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Continuous calculation and indication of operational measured values on the front display, indication of
measured values of the far end or all ends (for devices with active interfaces)
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Fault event memory (trip log) for the last eight network faults (faults in the power system), with real time
stamps
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Fault recording and data transfer for fault recording for a maximum time range of 15 seconds.
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Switching statistics: Counting of the trip and close commands initiated by the device as well as recording
of the short-circuit data and accumulation of the disconnected fault currents
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Communication with central control and memory components via serial interfaces possible (depending
on the ordered variant), optionally via RS232, RS485 connection, modem or fiber optic cable
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Commissioning aids such as connection check, direction check and circuit-breaker check
Introduction
1.3 Characteristics
28 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018