Chapter 6. Description of Operation of Protection Subsystem
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
6-20
Enabling or disabling of these units for trip generation is subjected to the following status of the
Recloser:
Recloser at Rest
Recloser Counting Security Time Following Closure #1, 2, 3 or 4
Recloser Counting Security Time Following External Manual Close
Recloser Counting Security Time Following Manual Closure Through Block Reclosing
The action of the trip masks can only take place if the corresponding unit has been activated,
within its own protection settings, given that if the unit has been deactivated, its pickup process
does not initiate.
Trip mask, which corresponds to the
NO
setting, makes the physical output of the trip contact,
or of an output configured as masked, but it realizes the whole process of the unit from start to
the decision of generating a trip.
Reclose Enable
Enabling or disabling of reclosing is possible in these faults:
-
Phase to Ground Faults tripped by the Time Elements (Ground Time).
-
Phase to Phase Faults tripped by the Time Elements (Phases Time).
-
Phase to Ground Faults tripped by the Instantaneous Elements (Ground
Instantaneous).
-
Phase to Phase Faults tripped by the Instantaneous Elements (Phase Instantaneous).
-
Open Phase element tripped.
-
Residual Current Detection element tripped.
-
External Protection actuation.
The masks are defined for the following Recloser
status:
-
Recloser after tripping following rest status.
-
Recloser after tripping while at rest #1, 2, 3 or 4.
If the Recloser is
Out of Service
or
Blocked
, the masks are not operative and all trips are by
default in active status.
Warning: Caution should be exercised when disabling protective trip elements that are
expected to respond to faults, as each of the above settings are independent. Masking of
all the units makes it impossible for the protection to trip. No masking is YES in the
setting. Therefore, you have to make sure that at least one measurement unit is not
masked and is in an enable status.
