Interlocking - Siemens Siprotec 7UM62 Manual

Functions
Check Sequence
Monitoring the
Command
Execution

2.46.3 Interlocking

300
• Command Entry (e.g. using the keypad on the local user interface of the device)
− Check password → Access rights
− Check Switching Mode (interlocking activated/deactivated→ Selection of
Deactivated Interlocking Recognition
• User configurable Interlocking checks
− Switching Authority
− Device Position (scheduled vs. actual comparison)
− Zone Controlled/Field Interlocking/ (logic using CFC)
− System Interlocking (centrally, using SCADA system or substation controller)
− Double Operation (interlocking against parallel switching operation)
− Protection Blocking (blocking of switching operations by protective functions)
• Fixed Command Checks
− Internal process time (software watch dog which checks the time for processing
the control action between initiation of the control and final close of the relay
contact.
− Setting Modification in Process (if setting modification is in process, commands
are denied or delayed)
− Equipment Present at Output (If a circuit breaker or other operable equipment is
not configured to a binary output, then the command is denied)
− Output Block (if an output block has been programmed for the circuit breaker,
and is active at the moment the command is processed, then the command is
denied)
− Component Hardware Malfunction
− Command in Progress (only one command can be processed at a time for one
circuit breaker or switch)
− 1-of-n-check (for schemes with multiple assignments, such as common ground,
whether a command has already been initiated for the affected output relay is
checked).
− Interruption of a Command because of a Cancel Command
− Running Time Monitor (feedback message monitoring time)
Interlocking checks in a SICAM
• System Interlocking (checked by a central control system such as SCADA or
substation controller)
• Zone Controlled/Bay Interlocking (checked in the device)
Zone Controlled/Bay Interlocking
System interlocking relies on the system data base in the substation or central control
system.
® ®
/SIPROTEC system are divided into:
7UM62 Manual
C53000-G1176-C149-3