7SG11 Argus Technical Reference
©2013 Siemens Protection Devices Limited
P20007 Page 37 of 71
Va / Vab
Vb / Vbc
Vc / Vca
<
<
<
&
1
or
&
Block P/F A
Block P/F B
Block P/F C
or
> <
or
> <
or
> <
P300008 Protection Functions / V
V Starter
V Trip
V Block Alarm
V Inhibit
Event
Event
Event
Event
Event
Event
Va/Vab starter
Vb/Vbc starter
Vc/Vca starter
V starter
V trip
Voltage Block
V Hysteresis
V Operation
V Delay
V O/P Phases
V Block Threshold
V Setting
c
c
Figure 2.8-1
Functional Diagram – Undervoltage/Overvoltage Element
Table 2-18
Voltage Protection Settings
Sub-menu:
Voltage
Setting name
Range (
bold
= default)
Units Notes
Gn V Operation
OFF
, O/V, U/V
Gn V Setting (Ph-N)
Gn V Setting (Ph-Ph)
5.0, 5.5…
80.0
…200.0
V
Setting indicates whether phase-
phase or phase-neutral is in use –
set by
System Config.:
VT Connection
Gn V Delay
0.00
, 0.01…20,20.5…
100.0,101.0…600.0
sec
Gn V Hysteresis
1,
2
…90
%
Gn V Block Threshold
OFF,1,2…
5
…100
V
Gn V O/P Phases
Any One
, All
Sub-menu:
O/P Relay Config.
Setting name
Range (
bold
= default)
Units Notes
Gn V Starter
Gn V Trip
Gn V Block Alarm
_, 1 for each output contact
(default:
_ _ _ _ _ _ _ _ _ _ _
)
Sub-menu:
Status Config.
Setting name
Range (
bold
= default)
Units Notes
Gn V Inhibit
_, 1 for each status input
(default:
_ _ _ _ _ _ _ _ _
)
2.9 Auto-Reclose
Argus 4 and Argus 6 only.
Approximately 90% of all overhead line faults are transient (non–damage) arcing Phase(s) to Earth faults induced
by lightning or due to other transient initiation. Use of a sequence of Instantaneous (Lowset) trips followed by
Delayed trips e.g. 2I + 1D with line Dead-Times (Reclose Delays) ensures that such transient faults are cleared
quickly before consequential permanent damage to the plant can occur and hence, after the line has been dead
for a short time (1 – 5 s) to allow arc by-products and ionised air to disperse, the healthy line can be reclosed and