The sequence above applies for single reclosure cycles. In 7VK61 multiple reclosure (up to 8 shots) is also
possible (see below).
Sequence of a 1-pole reclose cycle
1-pole reclose cycles are only possible if the external protection device and the Breaker Management Device
7VK61 relay are suitable for 1-pole tripping and if 1-pole tripping was enabled during configuration of the
protection functions (address 110 Trip mode = 1-/3pole, see also Section 2.1.1.2 Setting Notes). Of
course, the circuit-breaker must also be suitable for 1-pole tripping.
If the automatic reclosure function is ready, the short-circuit protection trips 1-pole for all 1-phase faults inside
the stage selected for reclosure. 1-pole tripping is of course only possible by fault protection functions which
can determine the faulted phase.
If multiple-phase faults occur, the fault protection issues a final 3-pole trip with the stage that is valid without
reclosure. Any 3-pole trip is final. The automatic reclosure function is blocked dynamically (see also margin
heading “Blocking reclosure”, above).
The automatic reclosure function is started in the case of 1-pole tripping. The (adjustable) dead time for the 1-
pole reclose cycle starts with reset of the trip command or opening of the circuit breaker pole (auxiliary
contact criterion). After expiry of the dead time, the circuit breaker receives a close command. At the same
time, the (adjustable) reclaim time is started. If the reclosure is blocked during the dead time following a 1-
pole trip, immediate 3-pole tripping can take place as an option (forced 3-pole trip).
If the fault is cleared (successful reclosure), the reclaim time expires and all functions return to their quiescent
state. The fault is cleared.
If the fault has not been eliminated (unsuccessful reclosure), the short-circuit protection initiates a final 3-pole
trip with the protection stage that is valid without reclosure. All faults during the reclaim time also lead to a
final 3-pole trip.
After unsuccessful reclosure (final tripping), the automatic reclosure function is blocked dynamically (see also
margin heading “Reclose Block”, above).
The sequence above applies for single reclosure cycles. In 7VK61 multiple reclosure (up to 8 shots) is also
possible (see below).
Sequence of a 1-pole and 3-pole Reclose Cycle
This operating mode is only possible if the responsible protection device and the Breaker Management Device
7VK61 are suitable for 1-pole tripping and if 1-pole tripping was enabled during configuration (address 110,
see also Section 2.1.1.2 Setting Notes). Of course, the circuit-breaker must also be suitable for 1-pole tripping.
If the automatic reclosure function is ready, the fault protection trips single-pole for 1-phase faults and 3-pole
for multi-phase faults. 1-pole tripping is of course only possible with fault protection functions that can deter-
mine the faulted phase. The valid protective element selected for reclosure ready state applies for all fault
types.
The automatic reclosure function is started at the moment of tripping. Depending on the type of fault, the
(adjustable) dead time for the 1-pole reclose cycle or the (separately adjustable) dead time for the 3-pole
reclose cycle starts following the reset of the trip command or opening of the circuit breaker (pole) (auxiliary
contact criterion). After expiry of the dead time, the circuit breaker receives a close command. At the same
time, the (adjustable) reclaim time is started. If the reclosure is blocked during the dead time following a 1-
pole trip, immediate 3-pole tripping can take place as an option (forced 3-pole trip).
If the fault is cleared (successful reclosure), the reclaim time expires and all functions return to their quiescent
state. The fault is cleared.
If the fault has not been eliminated (unsuccessful reclosure), the short-circuit protection initiates a final 3-pole
trip with the protection stage that is valid without reclosure. All faults during the reclaim time also lead to a
final 3-pole trip.
After unsuccessful reclosure (final tripping), the automatic reclosure function is blocked dynamically (see also
margin heading “Reclose Block”, above).
The sequence above applies for single reclosure cycles. In 7VK61 multiple reclosure (up to 8 shots) is also
possible (see below).
Functions
2.2 Automatic reclosure function (optional)
SIPROTEC 4, 7VK61, Manual 49
C53000-G1176-C159-5, Edition 05.2018
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