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232
Apparatus control
Circuit breaker
SWICON
SEL_OPEN
EXE_OPEN
Trip_logic
GTRIP
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The pole discordance function included in the SWICONA(B) is based on checking the
positions of the auxiliary contacts on the breaker. The connection of the trip signal is
made according to figure 114 and to the output board in the same way as for other pro-
tections (See 5.8.12 "Protections"). The T_POL time delay to trip is set to 2 seconds as
a default value. Since only one tripping logic is available in the control terminal, the
POL_DISC output is connected directly to the OR gate for the open command, if more
than one circuit breaker is included in the terminal.
Circuit breaker
SWICON
SEL_OPEN
EXE_OPEN
POL_DISC
2
T_POL
Trip_logic
GTRIP
EXTTRIP
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LF
&
>1
OPEN
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>1
&
OPEN
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&RQWURO
To output board
To output board
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