Protection functions

• Overcurrent protection
• Directional overcurrent protection
• Sensitive directional ground-fault detection
• Displacement voltage
• Intermittent ground-fault protection
• Directional intermittent ground fault protect
• High-impedance restricted ground fault
• Inrush restraint
• Motor protection
• Overload protection
• Temperature monitoring
• Under-/overvoltage protection
• Under-/overfrequency protection
• Rate-of-frequency-change protection
• Power protection (e.g. reverse, factor)
• Undervoltage controlled reactive power protection
• Breaker failure protection
• Negative-sequence protection
• Phase-sequence monitoring
• Synchro-check
• Fault locator
• Lockout
• Auto-reclosure

Control functions/programmable logic

• Commands for control of CB and of isolators
• Graphical visualization of switch positions
• Control via keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC (e.g. interlocking)

Monitoring functions

• Operational measured values V, I, f
• Energy metering values Wp,Wq
• Circuit-breaker wear monitoring
• Slave pointer
• Trip circuit supervision
• Fuse failure monitor
• 8 oscillographic fault records
• Motor statistics

Communication interfaces

• System interface IEC 60870-5-103, IEC 61850, Modbus RTU
• Service interface for DIGSI 4 or RTD-Box
• Front USB interface for DIGSI 4
• Time synchronization via IRIG B, DCF77

Hardware

• Spring-type terminals
• 4 current transformers
• 4 voltage transformers
• 16/22/36 binary inputs
• 7/10/23 output relays
• Graphical or 8 line text display