Siemens 7SC80 Manual page 95

mines for both elements, the phase and the ground element, what pickup value is active with what delay
when the circuit breaker is closed manually.
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Figure 2-21
External Control Command
If the manual closing signal is not sent from the 7SC80 Feeder Protection and Recloser Controller, but directly
from a control acknowledgment switch, this signal must be forwarded to a binary input of 7SC80 and routed
accordingly ( >Manual Close ) so that the element selected for MANUAL CLOSE can take effect. The alterna-
tive Inactive means that all elements operate as configured even with manual close and are not treated in
any special way.
Internal Control Function
If the manual close signal is sent via the internal control function of the device, an internal connection of
information has to be established via CFC (interlocking task level) using the CMD_Information block (see
Figure 2-22).
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Figure 2-22
Interaction with the Automatic Reclosing Function (phases)
If reclosing follows, high-speed and simultaneous protection against faults with 50-2 or 50-3 is usually
desired. If the fault still exists after the first reclosing, the 50-1 or the 51 element will be initiated with graded
tripping times, that is, element 50-2 or 50-3 will be blocked. You can use the parameters 1214 50-2 active
or 1216 50-3 active active for this purpose to define whether or not the 50-2 or the 50-3 element is
impacted by a release signal of the internal or an external automatic reclosing system. The setting with 79
active means that the 50-2 or the 50-3 element will only be released if automatic reclosing is not blocked. If
this is not desired, the setting Always is selected so that the 50-2 or the 50-3 element is always active.
The integrated automatic reclosing function of 7SC80 also provides the option to individually determine for
each overcurrent element whether tripping or blocking is to be carried out instantaneously or unaffected by
the AR with the set time delay (see Section
Interaction with the Automatic Reclosing Function (ground)
When reclosing occurs, it is desirable to have high-speed protection against faults with 50N-2 or 50N-3. If the
fault still exists after the first reclosing, the 50N-1 or the 51N element will be initiated with coordinated trip-
ping times, that is, element 50N-2 or 50N-3 will be blocked. At address 1314 50N-2 active or 1316 50N-3
active active it can be specified whether the 50N-2 or the 50N-3 element should be influenced by the
release signal of an internal or external automatic reclosing system. Address with 79 active determines
that the 50N-2 or the 50N-3 element will only operate if automatic reclosing is not blocked. If not desired,
select the setting Always so that the 50N-2 or the 50N-3 element will always operate, as configured.
The integrated automatic reclosing function of 7SJ62/64 also provides the option to individually determine for
each overcurrent element whether tripping or blocking is to be carried out instantaneously or unaffected by
the AR with the set time delay (see Section
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Manual close feature
Example for the generation of a manual close signal using the internal control function
2.14 Automatic Reclosing System
2.14 Automatic Reclosing System
2.2 Overcurrent Protection 50, 51, 50N, 51N
79).
79).
Functions
95