GE C60 Instruction Manual page 444

CONTROL ELEMENTS
Autoreclose programs
The autorecloser provides four programs that can cause from one to four reclose attempts (shots). After the first shot, all
subsequent recloses 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 (modes 3 and 4), an
connection with the tripping logic to cause a three-pole trip for single-phase faults.
Table 5-38: Autoreclose programs
Mode Autoreclose
mode
1 1 & 3 Pole
2 1 Pole
3 3 Pole-A
4 3 Pole-B
The four autoreclose modes are described as follows:
• 1 & 3 Pole — In this mode, the autorecloser starts the
single-phase initiated, the
timer if the autoreclose is three-phase time delay initiated. If two or more shots are enabled, the second, third, and
5
fourth shots are always three-pole and start the
• 1 Pole — In this mode, the autorecloser starts 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
• 3 Pole-A — In this mode, the autorecloser is initiated only for single phase faults, although the trip is three pole. The
autorecloser uses 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 Pole-B — In this mode, the autorecloser is initiated for any type of fault and starts the
shot. If the initiating signal is
are enabled, the second, third, and fourth shots are always three-phase and start the
Basic reclosing operation
Reclosing operation is determined primarily by the
started by the initiate inputs. A reclose initiate signal sends the scheme into the reclose-in-progress (RIP) state, asserting
the FlexLogic operand. The scheme is latched into the RIP state and resets only when an
AR RIP
breaker 1) or
AR CLS BKR 2
The dead time for the initial reclose operation is determined by the
setting, depending on the fault type and the mode selected. After the dead time interval the scheme asserts the
TIME 2
or
CLOSE BKR 1 AR CLOSE BKR 2
breaker closes or the scheme goes to Reset or Lockout.
There 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
operand is sealed-in until the Lockout or Reset signal appears.
The three-pole initiate and three-pole time delay initiate signals are latched until the
or Reset signal appears.
5-276
First shot
Single- Multi-phase
phase fault fault
1 Pole 3 Pole
1 Pole Lockout
3 Pole Lockout
3 Pole 3 Pole
AR 3-P DEAD TIME 1
timers.
AR 3-P DEAD TIME 2(4)
for the first shot if the fault is single phase. If the fault is multi phase the
AR 3-P DEAD TIME 1
AR 3-P DEAD TIME 2(4)
the scheme starts
AR 3P TD INIT
(autoreclose breaker 2) operand is generated or the scheme goes to the Lockout state.
operands, as determined by the sequence selected. These operands are latched until the
FlexLogic operand is set. This operand can be used in
AR FORCE 3-P
Second shot Third shot
Single- Multi-phase Single-
phase fault fault phase 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
3 Pole or Lockout 3 Pole or
Lockout Lockout
3 Pole or 3 Pole or 3 Pole or
Lockout Lockout Lockout
timer for the first shot if the autoreclose is
AR 1-P DEAD TIME
timer if the autoreclose is three-pole initiated, and the
timers.
AR 3-P DEAD TIME 2(4)
for the first shot if the fault is single phase. If the
AR 1-P DEAD TIME
timers.
AR 3-P DEAD TIME 2
and
AR MODE AR BKR SEQUENCE
AR 1-P DEAD TIME
(AR
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Fourth shot
Multi-phase Single-
fault phase fault
3 Pole or 3 Pole or
Lockout Lockout
3 Pole or 3 Pole or
Lockout Lockout
Lockout 3 Pole or
Lockout
3 Pole or 3 Pole or
Lockout Lockout
AR 3-P DEAD TIME 2
AR 3-P DEAD TIME 1
for the first shot. If two or more shots
AR 3-P DEAD TIME 2(4)
settings. The reclosing sequences are
(autoreclose
AR CLS BKR 1
, , or
AR 3-P DEAD TIME 1 AR 3-P DEAD
RIP) operand. The reclose-in-progress
BKR2, Lockout,
AR CLOSE BKR1, AR CLOSE
Multi-phase
fault
3 Pole or
Lockout
3 Pole or
Lockout
Lockout
3 Pole or
Lockout
for the first
timers.
AR