Siemens 6MD85, Manual

Page: 954 / 1256

Parameter: Release threshold
•
Recommended setting value
(_:101) Release threshold
=
50 V
With the
Release threshold
parameter you set the lower limit of the maximum phase-to-phase voltage
(V
max
). Siemens recommends using the default setting.
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. balan. V
_:1 Supv. balan. V:Mode
•
off
•
on
•
test
off
_:101 Supv. balan. V:Release
threshold 0.300 V to 170.000 V 50.000 V
_:102 Supv. balan. V:Threshold
min/max 0.58 to 0.95 0.75
_:6 Supv. balan. V:Delay
failure indication 0.00 sto 100.00 s 5.00 s
Information List
No. Information Data Class
(Type) Type
Supv. balan. V
_:82 Supv. balan. V:>Block function SPS I
_:54 Supv. balan. V:Inactive SPS O
_:52 Supv. balan. V:Behavior ENS O
_:53 Supv. balan. V:Health ENS O
_:71 Supv. balan. V:Failure SPS O
Voltage-Sum Supervision
Overview of Functions
In healthy system operation, the sum of all voltages at one measuring point must be approximately 0. The
Voltage-sum supervision monitors the sum of all voltages of one measuring point in the secondary circuit. It
detects connection errors during commissioning or short circuits and interruptions in the secondary circuit. For
summation of the voltages, the 3 phase-to-ground voltages and the residual voltage (da-dn - voltage of an
open-circuited delta winding) are required.
The voltage measurement is based on the RMS values of the fundamental component.
i
i
NOTE
For the Voltage-sum supervision, the externally generated residual voltage must be connected to the 4th
voltage measuring input.
For the Voltage-sum supervision to work correctly, the
Matching ratio Vph / VN
parameter must be
set accordingly.
8.3.5.5
8.3.5.6
8.3.6
8.3.6.1
Supervision Functions
8.3 Supervision of the Secondary System
954 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017