Siemens siprotec 7SA522 - Page 405

Functions
6-2577SA522 Manual
C53000-G1176-C119-2
.
Figure 6-133 Standard Interlocking Arrangements
The display shows the configured interlocking reasons. The are marked by letters ex-
plained in the following table 6-12.
Table 6-12 Interlocking commands
&
or
or
&
Remote
&
DIGSI
&
&
&
&
or
Device with Source
Switching Authority
Protection Blocking
Non-Interlocked
Interlocked
Command
SCHEDULED=ACT.y/n
System Interlock.*)y/n
Field Interlocking y/n
Protection Blockingy/n
Double Oper. Blocky/n
SW. Auth. LOCA> y/n
Sw. Auth. REMOTEy/n
LOCAL
DIGSI
AUTO
Switching Authority
Switching Mode
Switching Mode
52 Close
52 Open
feedback Indication
On/Off
Switching Authority Switching Mode
Event
Condition
*) Starting With Version 4.2
of Command =
SCHEDULED=ACT .y/n
&
1
) Source REMOTE also includes SAS.
LOCAL .. Command via substation controller.
REMOTE Command via telecontrol system to substation controller and from substation co
n
troller to device.
(Local/Remote)
DIGSI
Local
or
SAS REMOTE
1
),
DIGSI
Local
Remote
Output
to Relay
Local
Remote
On/Off
Interlocking commands Abbrev. Message
Control authorization L L
System interlock S S
Zone controlled Z Z
Target state = present state
(check switch position)
PP
Block by protection B B