Protection functions

• Overcurrent protection (definite-time/inverse-time/user-def.)
• Sensitive earth-fault detection
• Intermittent earth-fault protection
• High-impedance restricted earth fault
• Inrush-current detection
• Motor protection
  • Undercurrent monitoring
  • Starting time supervision
  • Restart inhibit
  • Locked rotor
  • Load jam protection
• Overload protection
• Temperature monitoring
• Breaker failure protection
• Negative-sequence protection
• Auto-reclosure
• Lockout

Control functions/programmable logic

• Commands for control of a circuit-breaker and of isolators
• Position of switching elements is shown on the graphic display
• Control via keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC (e.g. interlocking)

Monitoring functions

• Operational measured values
• Circuit-breaker wear monitoring
• Slave pointer
• Time metering of operating hours
• Trip circuit supervision
• 8 oscillographic fault records
• Motor statistics

Communication interfaces

• System interface
  • IEC 60870-5-103, IEC 61850
  • PROFIBUS-DP
  • DNP 3.0/MODBUS RTU
• Service interface for DIGSI 4 (modem)
• Front interface for DIGSI 4
• Time synchronization via IRIG B/DCF77

Hardware

• 4 current transformers
• 3/8/11 binary inputs
• 4/8/6 output relays