GE D90 Plus Instruction Manual page 298

CONTROL ELEMENTS
Autoreclose programs
Basic reclosing operation
290
The autorecloser provides four programs that can cause from one to four reclose attempts
(shots). After the first shot, all subsequent reclosings will always be 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 will go 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 will go 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 will 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
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION
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-