Breaker Control
307
7UM62 Manual
C53000-G1176-C149-3
Interlocking conditions can be programmed separately, for each switching device, for
device control CLOSE and/or OPEN. Processing of the status of the release condition
for an operation switching device can be based on information acquired:
−
directly, using a single point or double point indication (binary inputs), key-switch,
or internal indication (marking), or
−
with logic using CFC.
When a switching command is initiated, the actual status of all relevant switching
devices is scanned cyclically.
Substation
Controller (System
Interlocking)
Substation Controller (System interlocking) involves switchgear conditions of other
bays evaluated by a central control system.
Double Operation
Parallel switching operations are interlocked. When a control command is received, all
objects that are subject to double operation inhibit are checked for control commands
in progress. While the command is being executed, the inhibit is in turn active for all
other commands.
Blocked by
Protection
With this function, switching operations are blocked by the pickup of protective
elements. Blocking is configurable separately for both closing and tripping commands.
When configured, “Block CLOSE commands” blocks CLOSE commands, whereas
„Block TRIP commands” blocks TRIP signals.
Operations in progress will also be aborted by the pickup of a protective element.
Device Position
(Scheduled =
Actual)
For switching commands, a check takes place whether the selected switching device
is already in the scheduled/desired position (Open/Closed; scheduled/actual
comparison). This means, if a circuit breaker is already in the CLOSED position and
an attempt is made to issue a closing command, the command will be refused, with
the operating message ”scheduled condition equals actual condition”. If the circuit
breaker/switchgear device is in the intermediate position, then this check is not
performed.
Bypassing Inter-
locks
Interlocks can be bypassed to perform switching operations. This is either done inter-
nally by adding a bypass code to the command, or globally by so-called switching
modes.
G
SC=LOCAL
−
The 7UM62 offers the options “interlocked“ or “non-interlocked“ (bypassed) in the
display after entry of a password.
G
REMOTE and DIGSI
®
4
−
Interlocks for commands issued by SICAM
®
or DIGSI
®
4 are bypassed by a global
switching mode REMOTE. A separate bypass command has to be issued for this.
Each bypass is valid for only one switching operation, and only for commands orig-
inating from the same source.
−
Control: command to object “Switching mode REMOTE”, CLOSE
−
Control: switching command to “switching device”
G
Derived commands from CFC (automatic command, SC=AUTO):
−
Behaviour configured in the CFC block (“BOOL to command”).
