GE T60 Instruction Manual page 447

5 SETTINGS
d) BREAKER RESTRIKE

PATH: SETTINGS CONTROL ELEMENTS
 BREAKER RESTRIKE 1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
According to IEEE standard C37.100: 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".
10
8
6
4
2
0
–2
–4
–6
–8
OPERATE
–10
Figure 5–151: TYPICAL RESTRIKE WAVEFORM AND DETECTION FLAG
The breaker restrike algorithm responds to a successful interruption of the phase current following a declaration of capaci-
tor 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 breaker restrike condi-
tion is declared in the corresponding phase and the
user can add counters and other logic to facilitate the decision making process as to the appropriate actions upon detecting
a single restrike or a series of consecutive restrikes.
GE Multilin

MONITORING ELEMENTS
BREAKER RESTRIKE 1
FUNCTION: Disabled
BKR RSTR 1 BLOCK:
Off
BREAKER RESTRIKE 1
SOURCE: SRC 1
BREAKER RESTRIKE 1
PICKUP: 0.500 pu
BREAKER RESTRIKE 1
RESET 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
0.01
0.02
BRK RESTRIKE 1 OP
T60 Transformer Protection System
5.7 CONTROL ELEMENTS

BREAKER RESTRIKE 1(3)
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
0.03
operand is asserted for a short period of time. The
time (ms)
0.05
834764A1.CDR
5-301
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