ABB RELION REB500 Technical Manual page 78

Section 5
Bay protection functions
ZE_FOR_DIST
AR_ZE
START_ L1L2L3
IEC19000424 V1 EN-US
Figure 23: ZE segment
Table 55: Signals ZE (see above diagram)
Signal
ZE_FR_DIST
AR_ZE
START_L1L2L3
BIT_TRIP_ZE
Communication channel failure (UNBLOCK)
This logic is only used in conjunction with a permissive underreaching transfer tripping
scheme (PUTT OR2) or a permissive overreaching transfer tripping scheme (POTT).
The logic causes the communication channel failure signal from the communication
equipment (optocoupler input Com Fail) to be interpreted as a receive signal for 100 ms. This
enables tripping [BIT_UNBL] to take place in PUTT OR2 or POTT schemes in cases where the
PLC receive signal is attenuated by the primary system fault on the line.
P UNBLOCK
HFREC
HFFAIL
IEC19000425 V1 EN-US
Figure 24: UNBLOCK segment
Table 56: Signals UNBLOCK (see above diagram)
Signal
P_UNBLOCK
HFREC
HFFAIL
BIT_UNBL
72
OR
AND
In Out
X
X
X
X
AND
20
20
180000023-IEC19000425-1-en.vsdx
In Out
X
X
X
X
© Copyright 2019 ABB. All rights reserved
RSFF
S
R Q
18000022-IEC19000424-1-en.vsdx
Source
Binary input: ZExtension
Binary input: ZExtensionAR
Binary signal: Start L1+L2+L3
BIT_UNBL
AND
Source
Setting: Unblock
On = 1; Off = 0
Binary input: Com Rec
Binary signal: Com Fail
Bay protection functions REB500
1MRK 505 406-UEN B
BIT_TRIP_ZE
Drain
Internal signal to trip logic
(TRIP3)
GUID-EB4943D5-5BA6-473A-BCB0-FB8B294A3B96 v1
Drain
Internal signal to the POTT
or PUTT logic.
Technical manual