Siemens Siprotec 7UM62 Manual page 322

Functions
Current Switching Switching
Authority Status Authority
DIGSI
LOCAL Not checked
LOCAL Checked
REMOTE Not checked
REMOTE Checked
Switching Mode
Zone Controlled/
Field Interlocking
306
In detail, the following interlocking logic is derived when using default configuration
settings:
Command Issued
Locally
Allowed
Allowed
Interlocked *1)
- switching authority
REMOTE
Interlocked *1)
- switching authority
DIGSI
*1) By-passes Interlock if Configuration for "switching authority LOCAL (check for Local status): n"
*2) By-passes Interlock if Configuration for "switch authority REMOTE
(check for CLOSE, REMOTE, or DIGSI status): "n"
SC = Source of command
SC=AUTO:
Commands that are initiated internally (command processing in the CFC) are not
subject to switching authority and are therefore always allowed.
The switching mode determines whether selected interlocking conditions will be
activated or deactivated at the time of the switching operation.
The following switching modes are defined:
− Local commands (SC=LOCAL)
− interlocked, or
− non-interlocked switching.
The selection between local and remote is made in the 7UM62 using the local user
interface. A password is required to make this selection.
− Remote or DIGSI ®
4 (SC=LOCAL, REMOTE or DIGSI)
−interlocked, or
− non-interlocked switching. Here, deactivation of interlocking is accomplished via
a separate command. The position of the key switch is irrelevant.
− Auto: For commands from CFC (SC = AUTO), the notes in the CFC handbook
should be referred to (e.g. component: BOOL to command).
Zone Controlled (field interlocking) includes the verification that predetermined
switchgear position conditions are satisfied to prevent switching errors as well as
verification of the state of other mechanical interlocking such as High Voltage
compartment doors etc.
Command Issued
from SAS or SCADA
Interlocked *2)
- switching authority
LOCAL
Interlocked *2)
- switching authority
LOCAL
Allowed
Interlocked *2)
- switching authority
DIGSI
Command Issued from
DIGSI
Interlocked
"DIGSI not
checked"
Interlocked *2)
- switching authority
LOCAL
Interlocked
"DIGSI not
checked"
Allowed
7UM62 Manual
C53000-G1176-C149-3