GE D90 Plus Instruction Manual page 349

CHAPTER 7: PROTECTION
Autoreclose programs
Basic reclosing operation
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
The autorecloser provides four programs that can cause from one to four reclose attempts
(shots). After the first shot, all subsequent reclosings are always three-pole. If the
maximum number of shots selected is 1 (only one reclose attempt) and the fault is
persistent, after the first reclose the scheme goes to lockout upon another initiate signal.
For the three-pole reclose programs (the "3 Pole-A" and "3 Pole-B" mode values), an
FlexLogic operand is set. This operand can be used in connection with the
FORCE 3-P
tripping logic to cause a three-pole trip for single-phase faults.
Table 19: Autoreclose programs
Mode First shot
setting
Single- Multi-
phase phase
fault fault
"1 & 3 1 POLE 3 POLE
Pole"
"1 Pole" 1 POLE LOCKOUT 3 POLE or
"3 Pole-A" 3 POLE LOCKOUT 3 POLE or
"3 Pole-B" 3 POLE 3 POLE
In the "1 & 3 Pole" mode, the autorecloser starts the
the autoreclose is single-phase initiated, the
three-pole initiated, and the
delay initiated. If two or more shots are enabled, the second, third, and fourth shots are
always three-pole and start the
In the "1 Pole" mode, the autorecloser starts the
is single-phase. If the fault is three-phase or a three-pole trip on the breaker occurred
during the single-pole initiation, the scheme goes to lockout without reclosing. If two or
more shots are enabled, the second, third, and fourth shots are always three-pole and start
the through
3-P Dead Time 2
In the "3 Pole-A" mode, the autorecloser is initiated only for single-phase faults, although
the trip is three-pole. The autorecloser uses the
is single-phase. If the fault is multi-phase the scheme goes to lockout without reclosing. If
two or more shots are enabled, the second, third, and fourth shots are always three-phase
and start the
3-P Dead Time 2
In the "3 Pole-B" mode, the autorecloser is initiated for any type of fault and starts the
for the first shot. If the initiating signal is
Dead Time 1
for the first shot. If two or more shots are enabled, the second, third, and
P Dead Time 2
fourth shots are always three-phase and start the
timers.
4
Reclosing is enabled via settings and dynamically disabled from a line pickup operation, a
block signal, or a manual close. Once enabled, a reclose is initiated from the trip output
scheme or through the
1-Pole Initiate
are three initiate programs: single-pole initiate, three-pole initiate, and three-pole time
delay initiate. Any of these reclose initiate signals start the reclose cycle and set the
reclose-in-progress (AR RIP) operand. The reclose-in-progress operand is sealed-in until the
lockout or reset signal appears.
Second shot Third shot
Single- Multi- Single-
phase phase phase
fault fault fault
3 POLE or 3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
LOCKOUT 3 POLE or
LOCKOUT LOCKOUT
3 POLE or 3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
1-P Dead Time
3-P Dead Time 1
timer if the autoreclose is three-phase time
3-P Dead Time 2
3-P Dead Time 2 through
1-P Dead Time
timers.
3-P Dead Time 4
3-P Dead Time 1
through
3-P Dead Time 4
AR 3P TD
3-P Dead Time 2
and
3-Pole Initiate
CONTROL ELEMENTS
Fourth shot
Multi- Single- Multi-
phase phase phase
fault fault fault
3 POLE or 3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
3 POLE or 3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
LOCKOUT 3 POLE or LOCKOUT
LOCKOUT
3 POLE or 3 POLE or 3 POLE or
LOCKOUT LOCKOUT LOCKOUT
timer for the first shot if
timer if the autoreclose is
3-P Dead Time 4 timers.
for the first shot if the fault
for the first shot if the fault
timers.
INIT, the scheme starts the
through
3-P Dead Time
user-programmable inputs. There
AR
3-P
3-
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