ABB REL300 Instruction Manual page 132

5.2.28 The polarizing approach for the directional ground overcurrent unit is controlled by the setting of
DIRU. It has 3 selections:
ZSEQ
DUAL
NSEQ
5.2.29 Set GDIR to YES if directional control is required for the GB function.
5.2.30 Based on the requirements, set Close-Into-Fault (CIF) and stub-bus protection functions, by selecting
the value field (OUT/CT/CFT/STUB/SCF/SCFT) of CIF, where:
OUT
CF
CFT
STUB
SCF
SCFT
Refer to Section 3.4.7 for the application of CIF with Timer (200/0).
5.2.31 Set LLT (Load-Loss Trip) to YES, FDOG or NO required by the system, where:
YES
FDOG
NO
Refer to Section 3.4.9 for the LLT application.
5.2.32 Set LOPB to "DIST", if loss-of-potential block trip function on Z1, Z2, Z3 and Pilot is required, but the
overcurrent units (ITP, ITG & GB) are still operative. Set LOPB to "ALL: if loss-of-potential block
all type of trip is required.
5.2.33 Set LOIB to YES, if loss-of-current block trip function is required.
5.2.34 Set AL2S to YES, if trip alarm seal-in is required. The Reset pushbutton can be used to reset the sealed
AL2.
5.2.35 Set the SETR to YES if remote setting is required.
5.2.36 Procedure to set the real-time clock:
With REL300 in the "setting" mode, scroll the function field to TIME, and set the value to YES.
Depress function pushbutton RAISE to display YEAR, MNTH (month, DAY, WDAY (week day),
HOUR, and MIN (minute), and set the corresponding number via the value field. The REL300
clock will start at the time when the minute value is entered.
– zero sequence voltage polarization only.
– Both zero sequence voltage and zero sequence current polarization.
– Negative sequence voltage and current polarization.
– No CIFT or SBP selected
– Standard CIFT, without timer; No SBP
– Modified CIFT, with timer; No SBP
– SBP logic; No CIFT
– SBP plus standard CIFT
– SBP plus modified CIFT
– LLT trip with Z2 supervision.
– LLT trip with both Z2 and FDOG supervision.
– LT trip function is not used.
I.L. 40-385.7
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