Siemens 6MD85, Manual

Page: 708 / 1256

Information List
No. Information Data Class
(Type) Type
General
_:2311:501 General:>Test of direction I
_:2311:352 General:Test direction O
_:2311:351 General:Phi(I,V) O
Stage Control
Description
Logic
The following figure represents the stage control. It applies to all types of stages.
[lostacon-240812-01.tif, 1, en_US]
Figure 7-109 Logic Diagram of the Stage Control
Blocking of Stage in Case of Measuring-Voltage Failure
The stages can be blocked if a measuring-voltage failure occurs. In the event of blocking, the picked up stage
will be reset. The following blocking options are available for the stage:
•
From an internal source on the pickup of the Measuring-voltage failure detection function
•
From an external source via the binary input signal
>Open
of the function block Voltage-transformer
circuit breaker, which links to the trip of the voltage-transformer circuit breaker
The
Blk. by meas.-volt. failure
parameter can be set to either block or not block the stage when the
Measuring-voltage failure detection function picks up.
Application and Setting Notes
Parameter:
Blk. by meas.-volt. failure
•
Recommended setting value
(_:4861:10) Blk. by meas.-volt. failure
=
yes
7.7.3.5
7.7.4
7.7.4.1
7.7.4.2
Protection and Automation Functions
7.7 Directional Overcurrent Protection, Ground
708 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017