parameter to "1" and connecting the protection start information to the
corresponding DEL_INIT_ input.
When the function detects a closing of the circuit breaker, that is, any other closing
except the reclosing done by the function itself, it always prohibits shot initiation
for the time set with the Reclaim time parameter. Furthermore, if the Fourth delay
in SOTF parameter is "1", the Str _ delay shot 4 parameter delays are also activated.
Example 1
The protection operation time is 0.5 seconds, the Fourth delay in SOTF parameter
is set to "1" and the Str 2 delay shot 4 parameter is 0.05 seconds. The protection
start signal is connected to the DEL_INIT_2 input.
If the protection starts after the circuit breaker closes, the fast trip follows after the
set 0.05 seconds. The total trip time is the protection start delay + 0.05 seconds +
the time it takes to open the circuit breaker.
9.4.7 Signals
Table 621: DARREC Input signals
Name
Type Default Description
INIT_1 BOOLEAN 0=False AR initialization / blocking signal 1
INIT_2 BOOLEAN 0=False AR initialization / blocking signal 2
INIT_3 BOOLEAN 0=False AR initialization / blocking signal 3
INIT_4 BOOLEAN 0=False AR initialization / blocking signal 4
INIT_5 BOOLEAN 0=False AR initialization / blocking signal 5
INIT_6 BOOLEAN 0=False AR initialization / blocking signal 6
DEL_INIT_2 BOOLEAN 0=False Delayed AR initialization / blocking signal 2
DEL_INIT_3 BOOLEAN 0=False Delayed AR initialization / blocking signal 3
DEL_INIT_4 BOOLEAN 0=False Delayed AR initialization / blocking signal 4
BLK_RECL_T BOOLEAN 0=False Blocks and resets reclose time
BLK_RCLM_T BOOLEAN 0=False Blocks and resets reclaim time
BLK_THERM BOOLEAN 0=False Blocks and holds the reclose shot from the
thermal overload
CB_POS BOOLEAN 0=False Circuit breaker position input
CB_READY BOOLEAN 1=True Circuit breaker status signal
INC_SHOTP BOOLEAN 0=False A zone sequence coordination signal
INHIBIT_RECL BOOLEAN 0=False Interrupts and inhibits reclosing sequence
RECL_ON BOOLEAN 0=False Level sensitive signal for allowing (high) / not
allowing (low) reclosing
SYNC BOOLEAN 0=False Synchronizing check fulfilled
1YHT530004D05 D Section 9
Control functions
615 series 721
Technical Manual
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