GE L90 Instruction Manual page 376

SYSTEM SETUP
BREAKER 1 BLK OPEN
This setting can be used for blocking circuit breaker tripping for instance when breaker monitoring detects conditions such
as low SF gas density during which breaker opening can cause damage.
6
— Selects an operand that when activated, and unless blocked, initiates the Breaker 1 close commands.
BREAKER 1 CLOSE
BREAKER 1 BLK CLOSE
for blocking circuit breaker closing, for instance to prevent closing into a closed ground switch.
BREAKER1 ΦA/3P CLSD
mechanism. This input is for a normally-open 52/a status input that creates a logic 1 when the breaker is closed. If the
setting is selected as "3-Pole," this setting selects a single 52/a input as the operand used to track the
BREAKER 1 MODE
breaker open or closed position. If the mode is selected as "1-Pole," the input mentioned is used to track phase A and the
and
BREAKER 1 ΦB
BREAKER1 ΦA/3P OPND
creates a logic 1 when the breaker is open. If a separate 52/b contact input is not available, then the inverted 52/a status
signal or the inverted
BREAKER 1 ΦB CLOSED
pole, this input is used to track the breaker phase B closed position as outlined for phase A.
BREAKER 1 ΦB OPENED
pole, this input is used to track the breaker phase B opened position as outlined for phase A.
BREAKER 1 ΦC CLOSED
pole, this input is used to track the breaker phase C closed position as outlined for phase A.
BREAKER 1 ΦC OPENED
pole, this input is used to track the breaker phase C opened position as outlined for phase A.
5
BREAKER 1 TOPERATE
and 52/b auxiliary contacts during breaker operation. If transient disagreement still exists after this time has expired, the
BREAKER 1 BAD STATUS
BREAKER 1 EXT ALARM
reporting contact. While the selected operand is active, the
BREAKER 1 ALARM DELAY
pole position tracking operands does not declare a pole disagreement. This allows for non-simultaneous operation of the
poles.
If single-pole tripping and reclosing is used, the breaker can trip unsymmetrically for faults. In this case, the minimum
alarm delay setting must exceed the maximum time required for fault clearing and reclosing by a suitable margin.
BREAKER 1 OPEN SEAL-IN
Trip Out element or a manual open command to the circuit breaker.
MANUAL CLOSE RECAL1 TIME
manual close command to the circuit breaker.
BREAKER 1 OUT OF SV
BREAKER 1 RACKED-IN
racked-in or racked-out status is used to indicate dynamically the status of breaker symbol, only applied in the single-line
diagram in the graphical front panel. If this setting is set to Off, the racked status is not considered.
IEC 61850 functionality is permitted when the L90 device is in "Programmed" mode and not in local control mode.
5-152
— Selects an operand that prevents initiation of Breaker 1 open and individual phase trip commands.
— Selects an operand that prevents initiation of Breaker 1 close commands. This setting can be used
— Selects an operand, usually a contact input connected to a breaker auxiliary position tracking
settings select operands to track phases B and C, respectively.
BREAKER 1 ΦC
— Selects an operand, usually a contact input, that is for a normally-closed 52/b status input that
status signal can be used.
BREAKER 1 CLOSED
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
— This setting specifies the required interval to overcome transient disagreement between the 52/a
FlexLogic operand is asserted for alarm or blocking purposes.
— This setting selects an operand, usually an external contact input connected to a breaker alarm
— This setting specifies the delay interval during which a disagreement of status among the three-
— This setting specifies the seal-in time of the three-pole open command initiated by either the
— This setting specifies the seal-in time of the close commands due to an operator-initiated
— Selects an operand indicating that breaker 1 is out-of-service.
— This setting selects a contact input to show whether the breaker is racked-in or racked-out. The
operand is activated.
BREAKER 1 TROUBLE
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS