GE b30 Instruction Manual page 396

CONTROL ELEMENTS
BRK RSTR 1 BRK OPEN
the breaker is open. It is important to assign either 52 contact with this setting or breaker close command with
setting to give clear indication to the relay about breaker status.
CLS CMD
BRK RSTR 1 OPEN CMD
breaker is opened, either manually or from protection logic.
BRK RSTR 1 CLS CMD
breaker is closed.
5
5.8.7.5 CT trouble zone (ANSI 50/74)
SETTINGS  CONTROL ELEMENTS  MONITORING ELEMENTS  CT TROUBLE ZONE 1(2)
 CT TROUBLE ZONE 1

This element uses the differential current calculated in accordance with the bus configuration programmed under Bus
Zone 1. Operation of this element is therefore completely dependent on the dynamic bus replica, which must be defined
first. The bus differential zones are defined using the path
detects CT problems in any of the circuits actually connected to the differential zone defined as Bus Zone 1.
The
CT TROUBLE ZONE 1 PICKUP
differential current in a given phase remains above this level for the time interval defined by the
setting, CT Trouble is declared for the given phase by setting the appropriate FlexLogic output operand.
5-230
— Assigns a FlexLogic operand indicating the open position of the breaker. It must be logic "1" when
— Assigns a FlexLogic operand indicating a breaker open command. It must be logic "1" when the
— Assigns a FlexLogic operand indicating a breaker close command. It must be logic "1" when the
Figure 5-122: Breaker restrike logic
CT TROUBLE ZONE 1

FUNCTION: Disabled
CT TROUBLE ZONE 1

PICKUP: 0.100 pu
CT TROUBLE ZONE 1

DELAY: 10.0 s
CT TROUBLE ZONE 1

TARGET: Self-reset
CT TROUBLE ZONE 1

EVENTS: Disabled
setting specifies the differential current level that defines an abnormal bus state. If the
Range: Disabled, Enabled
Range: 0.020 to 2.000 pu in steps of 0.001
Range: 1.0 to 60.0 s in steps of 0.1
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SETTINGS  SYSTEM SETUP  BUS
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
BRK RSTR 1
. The CT Trouble element 1
CT TROUBLE ZONE 1 DELAY