Woodward highprotec MRI4, User Manual

Page: 512 / 727

Protective Elements
The following table gives a folder (structure) overview:
AR Menu Folder Purpose
AR
Path:
[Protection Para\Global Prot Para\AR]
Within this menu, external blockings, external lockings, external shot
increments and external resets can be assigned. Those external
events can only become effective, if they have been activated
(allowed) within the General Settings. Please see table row below.
General Settings
Path: [Protection Para\Set[x]\AR\General
Settings]
Within this menu several general settings can be activated: The
function itself, external blocking, zone coordination, external locking
and external shot increment can be set to active. The corresponding
trigger events (e.g. digital inputs) have to be assigned within the
corresponding global protection parameters. Please see table row
above.
Furthermore, this menu contains some timers, the number of permitted
reclosure attempts, the alarm mode (trip/alarm) and the reset mode
can be set
Shot Manager
Path: [Protection Para\Set[x]\AR\Shot
Manager]
In Shot-manager setting menu the control logics between individual
shots and protective functions will be specified. For each shot
(inclusive the pre shot) the trigger (start) events can be assigned.
For each shot, maximum 4 initiate functions (protective functions which
are dedicated to start this shot) can be selected from an available
protective function list.
When the autoreclosure process is running in the shot X stage, the
corresponding protection and control settings will be used to control the
operation during this stage.
In addition to that the dead times have to be set. For each shot, its
dead time will be set individually, except for the shot 0, for which no
dead timer setting is necessary. The shot 0 is just a virtual state to
define the time before the first shot is to issue. Each dead timer
specifies the time duration which has to be expired before the reclosure
command for this shot can be issued.
Wear Monitor
Path: [Protection Para\Set[x]\AR\Wear
Monitor]
This setting group contains all parameters which monitor the wear and
maintenance conditions related to the autoreclosure operations. The
corresponding information and control can be useful for an optimal
autoreclosure application.
Blo Fc
Path: [Protection Para\Global Prot
Para\AR\Blo Fc]
This group of settings specifies the protection functions by which the
autoreclosure function must be blocked even if the autoreclosure
function is already initiated.
Note the difference between the protection function which can be
blocked by auto-recloser and the function(s) here to block the auto-
recloser.
512 MRI4 DOK-HB-MRI4-2E