GE T60 Instruction Manual page 573

CHAPTER 5: SETTINGS
BREAKER RESTRIKE 1 HF DETECT
High-frequency pattern is typical for capacitor bank, cables, and long transmission lines applications.
— Assigns a FlexLogic operand indicating the open position of the breaker. It must be logic "1" when
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
— Assigns a FlexLogic operand indicating a breaker open command. It must be logic "1" when the
BRK RSTR 1 OPEN CMD
breaker is opened, either manually or from protection logic.
— Assigns a FlexLogic operand indicating a breaker close command. It must be logic "1" when the
BRK RSTR 1 CLS CMD
breaker is closed.
5.8.11.5 CT failure detector
SETTINGS  CONTROL ELEMENTS  MONITORING ELEMENTS  CT FAILURE DETECTOR 1(6)
 CT FAILURE
 DETECTOR 1
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
— Enables/disables high-frequency (HF) pattern detection when breaker restrike occurs.
Figure 5-210: Breaker restrike logic
CT FAIL 1 FUNCTION:

Disabled
CT FAIL 1 BLOCK:

Off
CT FAIL 1 3I0 INP 1:

SRC 1
CT FAIL 1 3I0 INP 1

PKP: 0.2 pu
CT FAIL 1 3I0 INP 2:

SRC 2
CT FAIL 1 3I0 INP 2

PKP: 0.2 pu
CT FAIL 1 3V0 INPUT:

SRC 1
CT FAIL 1 3V0 INPUT

PKP: 0.20 pu
CT FAIL 1 PICKUP

DELAY: 1.000 s
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.1 to 2.0 pu in steps of 0.1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.1 to 2.0 pu in steps of 0.1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.04 to 2.00 pu in steps of 0.01
Range: 0.000 to 65.535 s in steps of 0.001
CONTROL ELEMENTS
BRK RSTR 1
5
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