The default setting for blocking by the protection function is therefore
yes
. If necessary, you can disable this
blocking. You can find the settings on the same page as the double-activation blocking (see
).
i
i
NOTE
Remember, for instance, that pickup of the thermal overload protection can create a fault as well and thus
prevent switching commands.
i
i
NOTE
Note that the command check Blocking by protection function is only available for controlling circuit
breakers, because in this case a unique relationship with protection functions has been configured. In
disconnectors, this relationship is not always unique, precisely with regard to the 1 1/2 circuit-breaker
layout, and it must be mapped for each system using CFC charts.
To carry out the command check Blocking by protection function for disconnectors, use the following
indications (if present) in your interlocking conditions:
•
Group indication:
Pickup
(Function group VI 3-phase, VI 1-phase or V 3-phase)
•
Circuit-breaker failure protection:
Pickup
(Circuit-breaker failure protection)
Command Logging
All commands in the sequence are logged. The command log contains:
•
Date and time
•
Name of the switching device (or function group)
•
Reason for the transmission (SEL = Selected, OPR = Operate, CMT = Command execution end, SPN =
Spontaneous)
•
Status or switching direction
EXAMPLE
The following example illustrates control of a circuit breaker QA1 for various cases.
•
Successful command output
•
Interrupted command
•
Command interrupted by switchgear interlocking
•
Command ended due to missing feedback
•
Spontaneous change of switch position without command output
The following figures indicate command logging for various scenarios of the standard control model SBO with
feedback monitoring.
6.3.2
Control Functions
6.3 Control Functionality
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