ABB RELION REB500 Technical Manual page 42

Section 5
Bay protection functions
Table 46: Trip schemes
Text
ComMode
TripMode
SOTFMode
SOFT10sec
Weak
Unblock
Echo
TransBl
t1Block
t1TransBl
t2TransBl
t1EvolFaults
36
Explanation
Type of transfer tripping scheme:
• off
• PUTT NONDIR
• PUTT FWD
• PUTT OR2
• POTT
• BLOCK OR
Type of tripping (single or three-phase):
• 1PhTrip: single-phase tripping (for single-phase autoreclosure)
• 3PhTrip: three-phase tripping in all cases
• 3PhTripDel3: single-phase tripping (for single-phase autoreclosure) up to the
end of Delay (3), then three-phase tripping
Operating mode of the switch-onto-fault function:
• off
• Non-dir: non-directional underimpedance starting (recommended setting)
• Forward OR2: directional with overreaching (Zone 2, if over- reaching
disabled) or non-directional after decay of any memory voltage
Enables the 10 s delay for the switch-onto-fault function:
• off (t = 200 ms)
• on (t = 10 s)
Enables the Weak infeed logic for the PUTT or POTT transfer tripping modes
(Uweak must also be set):
• off
• on
Enables the deblocking logic:
• off
• on (only suitable for PLC)
Enables the Echo logic for the POTT transfer tripping mode:
• off
• on
Enables the Transient blocking logic (stabilization for reversal of power direction
on double-circuit lines) for the POTT and BLOCK OR (overreaching blocking
scheme) transfer tripping modes:
• off
• on
Waiting time for signal receive for the BLOCK OR (overreaching blocking scheme).
Time 1 for the TRANSBL (transient blocking) mode. Delay for faults after a fault was
detected in the reverse direction.
Time 2 for the TRANSBL (transient blocking) mode. The logic remains enabled for
the time t2 after a fault was detected in the reverse direction.
Time for discriminating evolving faults (three-phase trip for evolving faults during
this time setting)
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Bay protection functions REB500
Technical manual