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Interlocking
Switching
authority
Switching mode
Switching Authority
8.9.3
The switching authority ensures that simultaneous control can be done only from one command source. For
example, you must prevent a switching command from being executed by the control center during field
work. To do this, you must set the switching authority to Local. SIPROTEC 5 recognizes the following
switching authorities:
•
Local
•
Remote/station
•
Remote/control center
The Remote/station switching authority level was redefined in IEC 61850. You can deactivate the switching
authority in the device. Full support for this level is ensured only in devices with the IEC 61850 protocol.
The Remote/control center switching authority is normally used as the remote switching authority. You can
change the switching authority from Local to Remote Using the top key switch. You can also set this switch-
over in devices without the key switch after entering the confirmation ID.
Switching Mode
8.9.4
Changing the Switching Mode
!
DANGER
Danger due to hazardous voltages during the operation of electric devices
Noncompliance with the safety notes will result in death or severe injuries.
Only electrically qualified personnel may work on these devices. The electrically qualified personnel
²
must be thoroughly familiar with pertinent safety regulations and precautionary measures as well as
the warnings in this manual.
If you perform non-interlocked switching, for example, in the commissioning phase, you can change the
switching mode during operation.
You can set the switching mode using the key switch. Non-interlocked switching is permitted in the horizontal
key position (Interlocking OFF). Only interlocked switching is allowed in the vertical key position.
Proceed as follows for devices without a key switch:
Select the menu item Commands in the main menu.
²
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-9, Edition 06.2018
Submenu
Meaning
One line for every
Display of interlocking status of the switching devices with
switching device
the letters S, D, P and B.
•
•
•
•
Switching authority =
Display of current switching authority. If the device does not
Local
have a key switch, a change dialog is displayed and you can
enter the change via the device keyboard. If the device has a
key switch, the Switching authority menu bar is static and a
change can be made only via the key switch.
Switching mode = Inter-
Display of current switching mode. If the device does not
locked
have a key switch, a change dialog is displayed and you can
enter the change via the device keyboard. If the device has a
key switch, the Switching mode menu bar is static and a
change can be made only via the key switch.
S = Check of switching authority
D = Check of double-activation blocking
P = Check whether position is reached
B = Check of blocking by protection
Operation in the Operating State
8.9 Control System on Site
181
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