ABB MDAR Instruction Manual page 71

(8) The setting of TTYP is for selecting the reclos-
ing mode on single pole trip applications (if
applied). It has six selecting positions, OFF,
1PR, 2PR, 3PR, SPR and SR3R. Refer to the
guidances for reclosing mode programming for
the TTYP setting selection.
For example, Set MDAR (REL-300)
TTYP = SR3R.
(9) The settings of Z1RI, Z2RI and Z3RI provide
the selectivity for the Zone-1 RI (reclosing initi-
ation), Zone-2 RI and Zone-3 RI, respectively.
On pilot system applications, the Z1RI should
be set to YES if reclosing initiation is required.
On non-pilot system application, set Z1RI,
Z2RI and/or Z3RI to YES if RI is required when
the particular distance zone operates.
For example, Set MDAR (REL-300)
Z1RI = YES
Z2RI = NO
Z3RI = NO
(10) For pilot systems, set BFRB to YES if "RB on
breaker failure squelch" feature is required.
For example, Set MDAR (REL-300)
BFRB = YES
(11) The setting of PLT (pilot) combines with the
external input signal of Pilot Enable (on back-
plane panel) controls the operation of pilot and
reclosing initiation. The absence of either sig-
nal will:
(a) disable the pilot system,
(b) block the 3RI output, and
(c) allow SRI output on non-pilot system.
The PLT can be set either locally from the front
panel, or remotely via the communication
channel. For example, Set MDAR (REL-300)
PLT = YES
(12) The STYP (system type) selects the desired
relaying system in application. It has two selec-
tions, 3ZNP (3 zone non-pilot) and Z1E (Zone-
1 extension) in non-pilot MDAR (REL-300).
There are five selections, 3ZNP, Z1E, POTT
(permissive overreach transfer trip or Unblock-
ing), PUTT (permissive underreach transfer
trip) and BLK (blocking) in pilot MDAR (REL-
300) version 2.60. It should be selected and set
to the one which is desired.
For example, Set MDAR (REL-300)
STYP = BLK
(13) For pilot MDAR (REL-300) only, the WFEN
(weakfeed enable) setting should be selected
to YES for the weakfeed terminal if applicable.
For example, Set MDAR (REL-300)
WFEN = NO
(14) For non-pilot system, depends on the applica-
tion, the Zone-3 distance units, Z3P and Z3G,
can be selected to reach forward looking or
reverse looking by setting the Z3FR (Zone-3
forward or reverse) to FWD or REV.
For pilot system, the zone-3 distance units
should be set to reverse looking for carrier start
(blocking scheme) or reverse block (POTT
scheme).
For example, Set MDAR (REL-300)
Z3FR = REV
(15) The LV-units are used in CIFT. It should nor-
mally be set to 40 volts unless a higher setting
is required for more sensitive application.
For example, Set MDAR (REL-300) LV = 40
(16) Based on the power system requirement, the
OSB1, OSB2 and/or OSBP can be selected to
either YES or NO.
For example, Set MDAR (REL-300)
OSB1 = YES
OSB2 = YES
OSBP = YES
(17) Based on the requirements, set the CIF (close-
into-fault) to YES or NO.
For example, Set MDAR (REL-300) CIF = YES
(18) Set the LLT (loss-of-load trip) to YES, FDOG or
NO. Where:
YES — LLT trip with Z2 supervision.
FDOG — LLT trip with both Z2 and FDOG
supervision.
NO — LLT trip function is not used.
For example, Set MDAR (REL-300)
LLT = FDOG
(19) Set the LOPB to YES if loss-of-potential block
trip function is required.
For example, Set MDAR (REL-300)
I.L. 40-385.5
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