GE L60 Instruction Manual Download Page 285

Page: 285 / 498

GE Multilin

L60 Line Phase Comparison Relay

5-193

5 SETTINGS

5.6 CONTROL ELEMENTS

AR PROGRAMS:

The autorecloser provides four programs that can cause from one to four reclose attempts (shots). After the first shot, all
subsequent recloses 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.

The four autoreclose modes are described below:

“1 & 3 Pole”: In this mode, the autorecloser starts the

AR 1-P DEAD TIME

timer for the first shot if the autoreclose is sin-

gle-phase initiated, the

AR 3-P DEAD TIME 1

timer if the autoreclose is three-pole initiated, and the

AR 3-P DEAD TIME 2

timer if the autoreclose is three-phase time delay initiated. If two or more shots are enabled, the second, third, and
fourth shots are always three-pole and start the

AR 3-P DEAD TIME 2(4)

timers.

“1 Pole”: In this mode, the autorecloser starts the

AR 1-P DEAD TIME

for the first shot if the fault 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

AR 3-P DEAD TIME 2(4)

timers.

“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

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 or more shots are enabled, the second, third, and fourth shots are
always three-phase and start the

AR 3-P DEAD TIME 2(4)

timers.

“3 Pole-B”: In this mode, the autorecloser is initiated for any type of fault and starts the

AR 3-P DEAD TIME 1

for the first

shot. If the initiating signal is

AR 3P TD INIT

the scheme starts

AR 3-P DEAD TIME 2

for the first shot. If two or more shots

are enabled, the second, third, and fourth shots are always three-phase and start the

AR 3-P DEAD TIME 2(4)

timers.

BASIC RECLOSING OPERATION:

Reclosing operation is determined primarily by the

AR MODE

and

AR BKR SEQUENCE

settings. The reclosing sequences are

started by the initiate inputs. A reclose initiate signal will send the scheme into the reclose-in-progress (RIP) state, asserting
the

AR RIP

FlexLogic™ operand. The scheme is latched into the RIP state and resets only when an

AR CLS BKR 1

(autore-

close 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

AR 1-P DEAD TIME

AR 3-P DEAD TIME 1

, or

3-P DEAD TIME 2

setting, depending on the fault type and the mode selected. After the dead time interval the scheme will

assert the

AR CLOSE BKR 1

AR CLOSE BKR 2

operands, as determined by the sequence selected. These operands 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 (

GE L60, Instruction Manual, Page: 285 / 498

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