Protection functions

• overcurrent protection (50, 50N, 51, 51N, 51V)
• Directional time-overcurrent protection (67, 67N)
• Sensitive dir. ground-fault detection (59N/64, 67Ns/67N)
• High-impedance restricted ground fault (87N)
• Undercurrent monitoring (37)
• Thermal Overload protection (49)
• Under-/overvoltage protection (27/59)
• frequency protection (81O/U)
• Breaker failure protection (50BF)
• negative-sequence system overcurrent protection (46)
• Synch-check (25)
• Auto-reclosure (79)
• Fault locator (21FL)
• Lockout (86)

Control functions/programmable logic

• Commands for the ctrl. of CB, disconnect switches (isolators/isolating switches)
• Control through keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined PLC logic with CFC (e.g. interlocking)

Monitoring functions

• Operational measured values V, I, f
• Energy metering valuesWp,Wq
• Circuit-breaker wear monitorin
• Minimum and maximum values
• Trip circuit supervision (74TC)
• Fuse failure monitor
• 8 oscillographic fault records

Communication interfaces

• System/service interface

• IEC 61850 Edition 1 and 2
• IEC 60870-5-103 and IEC 60870-5-104
• PROFIBUS-DP - DNP 3.0
• MODBUS RTU- DNP3 TCP
• PROFINET

• Ethernet redundancy protocols RSTP, PRP and HSR
• Ethernet interface for DIGSI 4 and extension up to two SICAM I/O-Units 7XV5673
• USB front interface for DIGSI 4

Hardware

• 4 current transformers•0/3 voltage transformers
• 3/7/11 binary inputs (thresholds configurable using software)
• 5/8 binary outputs (2 changeover/Form C contacts)
• 1 life contact
• Pluggable current and voltage terminals