Emergency Mode (Advanced Stage)
You use the
Emergency mode
parameter to define whether the stage operates as emergency overcurrent
protection or as backup overcurrent protection. With the setting
Emergency mode
=
caused by main
prot.
, emergency overcurrent protection starts automatically when the main protection fails. With the
appropriate parameterization (
Emergency mode
=
caused by binary input
), the emergency mode can
also be activated from an external source.
If the overcurrent protection is set as backup overcurrent protection (parameter
Emergency mode
=
no
), it
operates independently of the main protection and thus in parallel.
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
)
•
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
).
Parameter Value
Description
yes
The directional overcurrent-protection stage is blocked. Siemens recom-
mends that you retain the default setting, as correct direction determination
cannot be guaranteed if a measuring-voltage failure occurs.
no
The directional overcurrent-protection stage is not blocked.
7.6.3.2
Protection and Automation Functions
7.6 Directional Overcurrent Protection, Phases
668
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
Summary of Contents for 6MD85
Page 8: ...8 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 30: ...30 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 46: ...46 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 172: ...172 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 514: ...514 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1056: ...1056 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1092: ...1092 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1204: ...1204 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1238: ...1238 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1252: ...1252 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...
Page 1256: ...1256 SIPROTEC 5 High Voltage Bay Controller Manual C53000 G5040 C015 9 Edition 11 2017 ...