GE C70 Instruction Manual page 429

CHAPTER 5: SETTINGS
5.8.10.4 Breaker restrike
SETTINGS  CONTROL ELEMENTS  MONITORING ELEMENTS  BREAKER RESTRIKE 1(3)
 BREAKER RESTRIKE 1

One breaker restrike element is provided for each CT bank in the C70.
According to IEEE standard C37.100 entitled IEEE Standard Definitions for Power Switchgear, restrike is defined as "a
resumption of current between the contacts of a switching device during an opening operation after an interval of zero
current of ¼ cycle at normal frequency or longer."
The breaker restrike algorithm responds to a successful interruption of the phase current following a declaration of
capacitor bank offline as per the breaker pole indication. If a high-frequency or system frequency current with a
magnitude greater than the threshold is resumed at least ¼ of a cycle later than the phase current interruption, then a
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
BREAKER RESTRIKE 1

FUNCTION: Disabled
BKR RESTRIKE 1

BLOCK: Off
BREAKER RESTRIKE 1

SOURCE: SRC 1
BREAKER RESTRIKE 1

PICKUP: 0.50 pu
BREAKER RESTRIKE 1

RST DELAY: 0.100 s
BREAKER RESTRIKE 1

HF DETECT: Enabled
BKR RSTR 1 BKR OPEN:

Off
BKR RSTR 1 OPEN CMD:

Off
BKR RSTR 1 CLS CMD:

Off
BREAKER RESTRIKE 1

TARGET: Self-reset
BREAKER RESTRIKE 1

EVENTS: Disabled
Figure 5-143: Typical restrike waveform and detection flag
Range: Disabled, Enabled
Range: FlexLogic operand
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.10 to 2.00 pu in steps of 0.01
Range: 0.000 to 65.535 s in steps of 0.001
Range: Disabled, Enabled
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
CONTROL ELEMENTS
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