Siemens 6MD85, Manual

Page: 959 / 1256

Blocking of the Function
The following blockings reset the function completely:
•
Via the binary input signal
>Block function
from an external or internal source
•
Via a protection pickup
The pickup signal from a protection function blocks the indication
Failure
.
Delay failure indication
When the device detects an inverted phase-rotation direction for the duration of the
Delay failure indi-
cation
, the indication
Failure
is generated.
Application and Setting Notes
Parameter: Delay failure indication
•
Recommended setting value
(_:6) Delay failure indication
=
5.00 s
Set the
Delay failure indication
parameter so that overfunctions due to disturbing influences (such as
switching operations) are avoided. Siemens recommends using the default setting.
Settings
Addr. Parameter C Setting Options Default Setting
Supv. ph.seq.V
_:1 Supv. ph.seq.V:Mode
•
off
•
on
•
test
off
_:6 Supv. ph.seq.V:Delay
failure indication 0.00 s to 100.00 s 5.00 s
Information List
No. Information Data Class
(Type) Type
Supv. ph.seq.V
_:82 Supv. ph.seq.V:>Block function SPS I
_:54 Supv. ph.seq.V:Inactive SPS O
_:52 Supv. ph.seq.V:Behavior ENS O
_:53 Supv. ph.seq.V:Health ENS O
_:71 Supv. ph.seq.V:Failure SPS O
Current-Balance Supervision
Overview of Functions
In healthy network operation, a certain balance between currents can be assumed.
The Current-balance supervision function detects the following errors:
•
Unbalance of phase currents in the secondary circuit
•
Connection errors during commissioning or short circuits and interruptions in the secondary circuit
The current measurement is based on the RMS values of the fundamental component.
Structure of the Function
The Current-balance supervision function is located in the Power-system data of each 3-phase current
measuring point.
8.3.7.4
8.3.7.5
8.3.7.6
8.3.8
8.3.8.1
8.3.8.2
Supervision Functions
8.3 Supervision of the Secondary System
SIPROTEC 5, High-Voltage Bay Controller, Manual 959
C53000-G5040-C015-9, Edition 11.2017