• Directional overcurrent protection with four steps for each winding

– Each step can be inverse or definite time delayed

– Each step can be directional or non-directional

• Instantaneous high speed earth fault function with low transient overreach

• Directional earth fault protection with four stages for each winding

– Each step can be inverse or definite time delayed

– Each step can be directional or non-directional

– Each step can be blocked on second harmonic component

• Synchrocheck function for single- or multi-breaker arrangements:

– Selectable energizing direction

– Two functions with built-in voltage selection

• Selectable additional software functions such as

breaker failure protection for each breaker, voltage protection, overexcitation protection, control and monitoring

• Tripping from Buchholtz, temperature devices etc. through binary inputs stabilized against capacitive discharges

• Built-in data communication modules for station bus IEC 61850-8-1

• Data communication modules for station bus IEC 60870-5-103. LON and SPA

• Integrated disturbance and event recorder for up to 40 analog and 96 binary signals

• Time synchronization over IEC 61850-8-1. LON, SPA, binary input or with optional GPS module

• Analog measurements accuracy up to below 0.5% for power and 0.25% for current and voltage and with site calibration to optimize total accuracy

• Versatile local human-machine interface

• Extensive self-supervision with internal event recorder

• Six independent groups of complete setting parameters with password protection

• Powerful software PC tool for setting, disturbance evaluation and configuration

• Remote end data communication modules for C37.94 and G.703