Interlocking; Interlocked/Non-Interlocked Switching - Siemens SIPROTEC 7SA6 Manual

Distance protection relay for all voltage levels

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Table of Contents

Monitoring the

Command Execu-

6.24.3 Interlocking

− Interruption of a command because of a cancel command

− Running time monitor (feedback message monitoring time)

Interlocking is executed by the user-defined logic (CFC). The interlocking checks of a

SICAM/SIPROTEC

-system are classified into:

• System interlocking checked by a central control system (for a busbar)

• Zone controlled/bay interlocking checked in the bay device (for the feeder)

System interlocking relies on the system data base in the central control system. Zone

controlled/bay interlocking relies on the status of the circuit breaker and other switches

that are connected to the relay.

The extent of the interlocking checks is determined by the configuration and interlock-

ing logic of the relay.

Switchgear which is subject to system interlocking in the central control system is

marked with a parameter (in the routing matrix)

For all commands the user can select the operation mode with interlocking (normal

mode) or without interlocking (test mode):

− for local commands by reprogramming the settings with password check,

− for automatic commands via command processing with CFC mittels Entriegelung-

− for local / remote commands, using an additional interlocking disable command, via

The command checks that can be selected for the SIPROTEC

ferred to as "standard interlocking". These checks can be activated (interlocked) or de-

activated (non interlocked) via DIGSI

Deactivated interlock switching means the configured interlocking conditions are not

checked in the relay.

Interlocked switching means that all configured interlocking conditions are checked in

the command check. If a condition could not be fulfilled, the command will be rejected

by a message with a minus added to it (e.g. " CO

ation response information. Table 6-20 shows some types of commands and messag-

"), immediately followed by an oper-

-relays are also re-

C53000-G1176-C156-2