GE F60 - Page 406

5-274 F60 Feeder Protection System GE Multilin
5.7 CONTROL ELEMENTS 5 SETTINGS
5
• BREAKER RESTRIKE 1 HF DETECT: This setting enables/disables high-frequency (HF) pattern detection when
breaker restrike occurs. High-frequency pattern is typical for capacitor bank, cables, and long transmission line appli-
cations.
• BRK RSTR 1 BRK OPEN: This setting assigns a FlexLogic operand indicating the open position of the breaker. It must
be logic “1” when breaker is open. It is important to assign either 52 contact with this setting or breaker close command
with
BRK RSTR 1 CLS CMD setting to give clear indication to the relay about breaker status.
• BRK RSTR 1 OPEN CMD: This setting assigns a FlexLogic operand indicating a breaker open command. It must be
logic “1” when breaker is opened, either manually or from protection logic.
• BRK RSTR 1 CLS CMD: This setting assigns a FlexLogic operand indicating a breaker close command. It must be
logic “1” when breaker is closed.
Figure 5–128: BREAKER RESTRIKE SCHEME LOGIC
RUN
Current interruption
detection logic
I < 0.05 pu
mag
for t > ¼ cycle
ARMED
RESET
SETTING
= Enabled
BREAKER RESTRIKE 1
FUNCTION
SETTING
= Off
BKR RSTR 1 BLK
AND
SETTING
= IA
BREAKER RESTRIKE 1
SOURCE
= IB
= IC
SETTING
= Off
BKR RSTR 1 BKR OPEN
SETTING
= Off
BKR RSTR 1 OPEN CMD
SETTING
= Off
BKR RSTR 1 CLS CMD
AND
OR
SETTING
BREAKER RESTRIKE 1 PICKUP
RUN
Restrike detection logic
0
T
RST
SETTING
BREAKER RESTRIKE 1
RESET DELAY
0
T
RST
0
T
RST
FLEXLOGIC OPERANDS
BKR RESTRIKE 1 OP A
BKR RESTRIKE 1 OP B
BKR RESTRIKE 1 OP C
BKR RESTRIKE 1 OP
FLEXLOGIC OPERAND
OR
834012A2.CDR
BREAKER RESTRIKE 1
HF DETECT