DEMA CPM 310 G User Manual page 109

Blocking Selectivity Settings
When the menu is entered
(top picture), the user is asked to select the settings
S5
group. Once the selection is made by the button
ENT
( ), the submenu shown on the middle and bottom
pictures appear. Note that the title of the submenu
includes the settings group name, e.g. "1. Blocking
Selectivity Set.", as seen on the middle picture.
On the submenu, it is decided whether the protection
functions should intervene related faults or not when
receive a blocking signal, as described recently. The
sample picture on the bottom of the previous page
shows the default settings, which will not allow any
blockings to be done by inputs. If any of the protection
functions (e.g. tI>>) are needed to be blocked by an
input signal, the parameter of that function must be set
Active
as .
It must be kept in mind that the setting the parameters
Blocking Logic Selectivity Settings Menu
on the is not
enough to utilize the blocking logic selectivity system;
additional settings and applications must be done for
commissioning, which are:
• Programming of the input and output relays,
• Pilot wiring between the relays.
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