Table of Contents
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Introduction
1.3 Characteristics
Command Processing
•
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)
•
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
•
Indication of the local and remote measured values according to magnitude and phase angle
•
Indication of the calculated differential and restraint currents
•
Indication of the measured values of the communication connection, as runtime and availability
Additional Functions
•
Battery-buffered clock which can be synchronized via a synchronization signal (DCF77, IRIGB via satellite
receiver), binary input or system interface
•
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)
•
Fault event memory (trip log) for the last eight network faults (faults in the power system), with real time
stamps
•
Fault recording and data transfer for fault recording for a maximum time range of 15 seconds.
•
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
•
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
•
Commissioning aids such as connection check, direction check and circuit-breaker check
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SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
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