P&B MRAR, Руководство пользователя

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21/07/2010 13 MRAR 01/96 C
5.1.5 AR Blocked
The AR Unit changes immediately to the AR Blocked state when an external or internal blocking signal
exists. No auto reclosing is possible in this state and only an external reset signal can cancel this. An
exception to this is the blocked state that is reached when the unit reaches the preset Maintenance
Lockout number. This blocked state can be cancelled when the counter (No) has been reset. (see also
para 5.2).
5.2 Description of Status Transition
AR Status Matrix
Closed
From
Inactive Reclaim
Time Ready Starting Cycle Blocked
Inactive
CB
Manual
ON External
Blocking
Signal
Reclaim
Time
CB OFF Reclaim
Time
Exprired External
Blocking
Signal
Ready CB OFF Protection
Running
and/or
Tripped,
CB Energy
OK External
Blocking
Signal
Starting Starting
Conditions
Not
Fulfilled Start
Signal
Interrupted Start
Conditions
Fulfilled
(Fault
Time, CB
OFF etc.) External
Blocking
Signal
Cycle
AR
Successful External or
Internal
Blocking
Signal
Blocked
External
Blocking
Signal
= No Transition Possible
From the above table it is possible to determine which status transitions are possible with the MRAR.
When the unit for instance is in the Cycle State, only two transitions are possible:
•
Transition to the Ready state when reclosing has been successful.
•
Transition to the Blocked state by an external or internal blocking signal.
The grey shaded sections indicate that no transition is possible.