GE L30, Инструкция по эксплуатации

Страница: 494 / 702

5-280 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 5: SETTINGS
5
The recloser is latched in the Lockout state until a "reset from lockout" signal is asserted, either from a manual close of the
breaker or from a manual reset command (local or remote). The reset from lockout can be accomplished by operator
command, by manually closing the breaker, or whenever the breaker has been closed and stays closed for a preset time.
After the dead time elapses, the scheme issues the close signal. The close signal is latched until the breaker closes or the
scheme goes to Lockout.
A reset timer output resets the recloser following a successful reclosure sequence. The reset time is based on the breaker
"reclaim time," which is the minimum time required between successive reclose sequences.
5.8.8.1 Settings
AR1 INITIATE
— Selects the FlexLogic operand that initiates the scheme, typically the trip signal from protection.
AR1 BLOCK
— Selects the FlexLogic operand that blocks the autoreclosure initiate (it can be from the breaker failure, bus
differential protection, and so on).
AR1 MAX NUMBER OF SHOTS
— Specifies the number of reclosures that can be attempted before reclosure goes to “Lockout”
because the fault is permanent.
AR1 REDUCE MAX TO 1(3)
— Selects the FlexLogic operand that changes the maximum number of shots from the initial
setting to 1, 2, or 3, respectively.
AR1 MANUAL CLOSE
— Selects the logic input set when the breaker is manually closed.
AR1 MNL RST FRM LO
— Selects the FlexLogic operand that resets the autoreclosure from Lockout condition. Typically this is
a manual reset from lockout, local or remote.
AR1 RESET LOCKOUT IF BREAKER CLOSED
— This setting allows the autoreclose scheme to reset from Lockout if the breaker
has been manually closed and stays closed for a preset time. In order for this setting to be effective, disable the next
setting (
AR1 RESET LOCKOUT ON MANUAL CLOSE
).
AR1 RESET LOCKOUT ON MANUAL CLOSE
— This setting allows the autoreclose scheme to reset from Lockout when the
breaker is manually closed regardless if the breaker remains closed or not. This setting overrides the previous setting (
AR1
RESET LOCKOUT IF BREAKER CLOSED
).
AR1 BLK TIME UPON MNL CLS
— The autoreclose scheme can be disabled for a programmable time delay after the
associated circuit breaker is manually closed. This prevents reclosing onto a fault after a manual close. This delay must be
longer than the slowest expected trip from any protection not blocked after manual closing. If no overcurrent trips occur
after a manual close and this time expires, the autoreclose scheme is enabled.
AR1 DEAD TIME 1
to
AR1 DEAD TIME 4
— These are the intentional delays before first, second, third, and fourth breaker
automatic reclosures (1st, 2nd, and 3rd shots), respectively. Set them longer than the estimated deionizing time following a
three pole trip.
AR1 ADD DELAY 1
— This setting selects the FlexLogic operand that introduces an additional delay (Delay 1) to the initial set
Dead Time (1 to 4). When this setting is “Off,” Delay 1 is by-passed.
AR1 DELAY 1
— This setting establishes the extent of the additional dead time Delay 1.
AR1 ADD DELAY 2
— This setting selects the FlexLogic operand that introduces an additional delay (Delay 2) to the initial set
Dead Time (1 to 4). When this setting is “Off”, Delay 2 is by-passed.
AR1 DELAY 2
— This setting establishes the extent of the additional dead time Delay 2.
AR1 RESET LOCKOUT DELAY
— This setting establishes how long the breaker stays closed after a manual close command, in
order for the autorecloser to reset from Lockout.
AR1 RESET TIME
— A reset timer output resets the recloser following a successful reclosure sequence. The setting is based
on the breaker "reclaim time," which is the minimum time required between successive reclose sequences.
AR1 INCOMPLETE SEQ TIME
— This timer defines the maximum time interval allowed for a single reclose shot. It is started
whenever a reclosure is initiated and is active when the scheme is in the "reclose-in-progress" state. If all conditions
allowing a breaker closure are not satisfied when this time expires, the scheme goes to Lockout.
This timer must be set to a delay less than the reset timer.