f-Protection Module – Frequency [81O/U, 78, 81R]
Frequency Protection Module Input States
Name
Description
Assignment via
ExBlo1-I
Module input state: External blocking1
[Protection Para
/Global Prot Para
/f-Prot
/f[1]]
ExBlo2-I
Module input state: External blocking2
[Protection Para
/Global Prot Para
/f-Prot
/f[1]]
ExBlo TripCmd-I
Module input state: External Blocking of the
Trip Command
[Protection Para
/Global Prot Para
/f-Prot
/f[1]]
Frequency Protection Module Signals (Output States)
Name
Description
active
Signal: active
ExBlo
Signal: External Blocking
Blo by V<
Signal: Module is blocked by undervoltage.
Blo TripCmd
Signal: Trip Command blocked
ExBlo TripCmd
Signal: External Blocking of the Trip Command
Alarm f
Signal: Alarm Frequency Protection
Alarm df/dt | DF/DT
Alarm instantaneous or average value of the rate-of-frequency-
change
Alarm delta phi
Signal: Alarm Vector Surge
Alarm
Signal: Alarm Frequency Protection (collective signal)
Trip f
Signal: Frequency has exceeded the limit.
Trip df/dt | DF/DT
Signal: Trip df/dt or DF/DT
Trip delta phi
Signal: Trip delta phi
Trip
Signal: Trip Frequency Protection (collective signal)
TripCmd
Signal: Trip Command
Page 264
EN MRU4 10/09