GE C60 Instruction Manual page 133

5 SETTINGS
AR PROGRAMS:
The autorecloser provides four programs that can cause one or two reclose attempts (shots). The second reclose 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 3-pole reclose programs (modes 3 and 4), an "AR FORCE 3-P" FlexLogic™ operand is set. This operand can be
used in connection with the tripping logic to cause a three-pole trip for single-phase faults.
Table 5–15: AR PROGRAMS
MODE AR MODE
NO.
1 1 & 3 POLE
2 1 POLE
3 3 POLE-A
4 3 POLE-B
Note: LO = Lockout
• MODE 1, 1 & 3 POLE: When in this mode the autorecloser starts the
autoreclose is single-phase initiated, the
timer if the autoreclose is three-phase time delay initiated. If two shots are enabled, the second shot is
3-P DEAD TIME 2
always three-phase and the
• MODE 2, 1 POLE: When in this mode the autorecloser starts the
phase. If the fault is three-phase the scheme goes to lockout without reclosing. If two shots are enabled, the second
shot is always three-phase and starts
• MODE 3, 3 POLE-A: When in this mode the autorecloser is initiated only for single phase faults, although the trip is
three pole. The autorecloser uses the "AR 3-P DEAD TIME 1" for the first shot if the fault is single phase. If the fault is
multi phase the scheme will go to Lockout without reclosing. If two shots are enabled, the second shot is always three-
phase and starts "AR 3-P DEAD TIME 2".
• MODE 4, 3 POLE-B: When in this mode the autorecloser is initiated for any type of fault and starts the
for the first shot. If the initiating signal is
TIME 1
two shots are enabled, the second shot is always three-phase and starts
BASIC RECLOSING OPERATION:
Reclosing operation is determined primarily by the
started by the initiate inputs. A reclose initiate signal will send the scheme into the Reclose In Progress (RIP) state, assert-
ing the "AR RIP" operand. The scheme is latched into the RIP state and resets only when an "AR CLS BKR 1" (autoreclose
breaker 1) or "AR CLS BKR 2" (autoreclose breaker 2) operand is generated or the scheme goes to the Lockout state.
The dead time for the initial reclose operation will be determined by either the
setting, depending on the fault type and the mode selected. After the dead time interval the scheme will
3-P DEAD TIME 2
assert the "AR CLOSE BKR 1" or "AR CLOSE BKR 2" operands, as determined by the sequence selected. These oper-
ands are latched until the 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 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.
The three-pole initiate and three-pole time delay initiate signals are latched until the "Close Bkr1 or Bkr2" or Lockout or
Reset signal appears.
AR PAUSE:
The pause input offers the possibility of freezing the autoreclose cycle until the pause signal disappears. This may be done
when a trip occurs and simultaneously or previously, some conditions are detected such as out-of step or loss of guard fre-
quency, or a remote transfer trip signal is received. The pause signal blocks all three dead timers. When the "pause" signal
disappears the autoreclose cycle is resumed by initiating the
GE Multilin
FIRST SHOT
SINGLE-PHASE MULTI-PHASE
FAULT FAULT
1 POLE 3 POLE
1 POLE LO
3 POLE LO
3 POLE 3 POLE
AR 3-P DEAD TIME 1
timer is started.
AR 3-P DEAD TIME 2
AR 3-P DEAD TIME 2
AR 3P TD INIT
AR MODE
C60 Breaker Management Relay
SECOND SHOT
SINGLE-PHASE MULTI-PHASE
FAULT
3 POLE or LO 3 POLE or LO
3 POLE or LO 3 POLE or LO
3 POLE or LO
3 POLE or LO 3 POLE or LO
AR 1-P DEAD TIME
timer if the autoreclose is three-phase initiated, and the
for the first shot if the fault is single
AR 1-P DEAD TIME
.
the scheme starts
AR 3-P DEAD TIME 2
AR 3-P DEAD TIME 2
and settings. The reclosing sequences are
AR BKR SEQUENCE
AR 1-P DEAD TIME
.
AR 3-P DEAD TIME 2
5.6 CONTROL ELEMENTS
FAULT
LO
timer for the first shot if the
AR 3-P DEAD
for the first shot. If
.
, , or
AR 3-P DEAD TIME 1
5-69
AR
5
AR