Table of Contents
Advertisement
Functions
2.11 Automatic Reclosure Function (optional) 79
Address 3423
Address 3424
Address 3425
For the functions which are to start the auto-reclosure function, the corresponding address is set to YES, for
the others to NO. The other functions cannot start the automatic reclosure because reclosure is of little use
here.
First Reclosing Cycle
Address 3450 1.AR:START is only available if the automatic reclosing function works in the operating mode
with action time, i.e. address AR control mode = PU w/ActionTime or Trip w/ActionT.. was set
during configuration of the protection functions (see Section
the automatic reclosing function is started with the first cycle. This parameter and different action times allow
you to control the effectiveness of the cycles (AR control mode = Trip ....).
The action time 1.AR:ActionTime (address 3451) is the time after initiation (fault detection) by any protec-
tive function which can start the automatic reclosure function within which the trip command must appear. If
the command does not appear until after the action time has expired, there is no reclosure. Depending on the
configuration of the protective functions the action time may also be omitted; this applies especially when an
initiating protective function has no fault detection signal.
Using 134 AR control mode = TRIP ... you can set the dead time for the 3-pole reclosing cycle at
address 3457 1.AR:Dead 3Trip. For 3-pole tripping the power system stability is the main concern. Since
the deenergized line cannot transfer synchronizing energy, only short dead times are allowed. The usual
values are 0.3 s to 0.6 s. If the device operates with a synchronism check device, a longer dead time may be
tolerated under certain circumstances. Longer 3-pole dead times are also possible in radial networks.
When 134 AR control mode = Pickup ..., it is possible to make the dead times dependent on the type
of fault detected by the initiating protection function(s).
Table 2-3
3453 1.AR:DeadT.1Flt
3454 1.AR:DeadT.2Flt
3455 1.AR:DeadT.3Flt
If the dead time is to be the same for all types of faults, set all three parameters the same. Note that these
settings only cause different dead times for different pickups.
If, when setting the reaction to evolving faults (see above at "General"), you have set address 3407 EV. FLT.
MODE = starts 3p AR, you can set a separate dead time for the 3-pole dead time after clearance of the
evolving fault 1.AR:DeadT.EV. (address 3458). Stability aspects are also decisive here. Normally the setting
constraints are similar to address 3457 1.AR:Dead 3Trip.
Under address 3459 1.AR:52? CLOSE it can be determined whether the readiness of the circuit breaker
("circuit breaker ready") is interrogated before this first reclosure. With the setting YES, the dead time may be
extended if the circuit breaker is not ready for a CLOSE–TRIP–cycle when the dead time expires. The maximum
extension that is possible is the circuit-breaker monitoring time; this time was set for all reclosure cycles
together under address 3409 CB TIME OUT (see above). Details about the circuit-breaker monitoring can be
found in the function description, Section
heading "Interrogation of circuit-breaker ready state".
Second Reclosing Cycle
If two cycles have been set in the configuration of the scope of protection functions, you can set individual
reclosing parameters for the second cycle. The same options are available as for the first cycle. Again, only
some of the parameters shown below will be available depending on the selections made during configura-
tion of the scope of protection functions.
3461 2.AR:START
3462 2.AR:ActionTime
138
AR w/ INT.TRIP, i.e. with permissive underreach transfer trip (PUTT)
AR w/ DTT, i.e. with direct transfer trip
AR w/ 50(N)-B, i.e. with time overcurrent protection
AR control mode = with PICKUP ...
is the dead time after 1-phase pickup
is the dead time after 2-phase pickup
is the dead time after 3-phase pickup
2.11 Automatic Reclosure Function (optional)
Start in second cycle generally allowed
Action time for the second cycle
2.1.1.2 Setting
Notes). It determines whether
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
79, at margin
Advertisement
Table of Contents
