Functions 

• Differential protection

– High impedance differential protection (PDIF,87X)

• Current protection

– Instantaneous phase overcurrent protection(PIOC,50)

– Four step phase overcurrent protection(POCM,51/67)

– Instantaneous residual overcurrent protection(PIOC,50N)

– Four step residual overcurrent protection(PEFM,51N/67N)

– Thermal overload protection, one time constant (PTTR,26)

– Thermal overload protection, two time constants (PTTR,49)

– Breaker failure protection (RBRF,50BF)

– Stub protection (PTOC, 50STB)

– Pole discordance protection (RPLD,52PD)

• Voltage protection

– Two step undervoltage protection (PUVM,27)

– Two step overvoltage protection (POVM,59)

– Two step residual overvoltage protection(POVM,59N)

• Frequency protection

– Underfrequency protection (PTUF,81)

– Overfrequency protection (PTOF,81)

– Rate-of-change frequency protection(PFRC,81)

• Multipurpose protection

– General current and voltage protection(GAPC)

• Secondary system supervision

– Current circuit supervision (RDIF)

– Fuse failure supervision (RFUF)

• Control

– Synchrocheck and energizing check(RSYN,25)

– Autorecloser (RREC,79)

– Apparatus control for single bay, max 8 app.(1CB) incl. Interlocking (APC8)

– Apparatus control for single bay, max 15 app.(2CBs) incl. Interlocking (APC15)

– Apparatus control for up to 6 bays, max 30app. (6CBs) incl. Interlocking (APC30)

• Logic

– Tripping logic (PTRC, 94)

– Trip matrix logic

– Configurable logic blocks

– Fixed signal function block

• Monitoring

– Measurements (MMXU)

– Supervision of mA input signals (MVGGIO)

– Event counter (GGIO)

– Event function

– Disturbance report (RBDR)

– Fault locator (RFLO)