Stage Control
Description
Logic
The following figure represents the stage control. It applies to all types of stages.
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Figure 6-48 Stage-Control Logic Diagram
Blocking of the Stage with Measuring-Voltage Failure (Basic and Advanced Stage)
The stage 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 inside on pickup of the Measuring-voltage failure detection function (see chapter 9.3.2.1 Over-
view of Functions)
•
From an external source via the binary input signal >Open of the function block Volt.-transf. c.
b., which links in the tripping of the voltage-transformer circuit breaker
The Blk. by meas.-volt. failure parameter can be set so that measuring-voltage failure detection
blocks the stage or does not block it.
Application and Setting Notes
Parameter: Blk. by meas.-volt. failure
•
Recommended setting value (_:8131:10) Blk. by meas.-volt. failure = yes
You use the Blk. by meas.-volt. failure parameter to control the behavior of the stage when a
measuring-voltage failure is detected.
A measuring-voltage failure can only be detected if one of the following two conditions is met:
•
The device-internal supervision function Measuring-voltage failure detection is configured and
switched on.
•
The binary input signal >Open of the function block VTCB is connected to the voltage-transformer circuit
breaker (see chapter 9.3.4.1 Overview of Functions).
6.6.3
6.6.3.1
6.6.3.2
Protection and Automation Functions
6.6 Directional Overcurrent Protection, Phases
410 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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