Functions
2.1 General
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
30
The AR control mode at address 134 allows a maximum of four options. On the one hand, it can be deter-
mined whether the automatic reclosure cycles are carried out according to the fault type detected by the pickup
of the starting protective function(s) or according to the type of trip command. On the other hand, the auto-
matic reclosing function can be operated with or without action time.
The setting Trip ... (with trip command ..., default setting) allows you to specify different dead times for each
automatic reclose cycle.
The setting Pickup ... (with pickup ...) allows you to enter different dead times for the automatic reclose
cycles for 1
-phase, 2-phase and 3-phase short circuits. The pickup status of the protection functions at the
instant the trip command disappears is decisive here. This operating mode enables making the dead times de-
pendent on the type of fault also for three-pole reclosure cycles. Tripping is always three-pole.
The setting ... w/ Tact (with ... action time) provides an action time for each automatic reclose cycle. The
action time is started by a general pickup of all protection functions. If there is no trip command yet when the
action time has expired, the corresponding automatic reclosure cycle cannot be executed. Section 2.11 pro-
vides detailed information on this topic. For time graded protection this setting is recommended. If the protec-
tion function which is to operate with automatic reclosure does not have a general pickup signal for starting the
action times, select ... w/o Tact (without action time).
Address 137 27/59 allows activating the voltage protection function with a variety of undervoltage and over-
voltage protection elements.
For the trip circuit supervision enter the number of trip circuits to be monitored at address 140 74 Trip Ct
Supv: 1 trip circuit, 2 trip circuits or 3 trip circuits, unless you omit it (Disabled).
If the device is connected to voltage transformers, specify this condition in address 144 V-TRANSFORMER. The
voltage-based functions, for instance the directional overcurrent protection elements, the ground fault differen-
tial protection in resonant-grounded/isolated systems or determination of the voltage-based measured values,
can only be activated if voltage transformers are connected.
The flexible protection functions can be configured via parameter FLEXIBLE FUNC.. You can create up to 20
flexible functions by setting a checkmark in front of the desired function. If the checkmark of a function is re-
moved, all settings and configurations made previously will be lost. After re-selecting the function, all settings
and configurations are in default setting. The flexible function can be configured in DIGSI at „ Settings“, „Addi-
tional Functions“ and „Settings“. The routing is done, as usual, under „Settings“ and „Masking I/O“. If you want
to use the flexible protection function, the device must be connected to voltage transformers.
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