Voltage Protection - Siemens 7SG11 Manual

Setting name
2-Out-Of-3 Gate Logic
P/F Charact Angle
E/F Charact Angle
SEF Charact Angle
Voltage Memory
Sub-menu: O/P Relay Config.
Setting name
Gn P/F FWD Block
Gn P/F REV Block
Gn E/F FWD Block
Gn E/F REV Block
Gn SEF FWD Block
Gn SEF REV Block
2.8

Voltage Protection

Argus 2 (type II) models only
A single three-phase voltage element with definite time delay is provided. The Voltage:V Operation setting allows the
element to be set for overvoltage or undervoltage operation. When set to undervoltage an additional blocking
threshold (Voltage:V Block Threshold) prevents inadvertent operation when the system is de-energised.
An instantaneous output is driven from the level detector (Voltage:V Ph-Ph Setting)/(Voltage:V Ph-N Setting), with a
follower definite time delay Voltage:V Delay driving the Voltage:V Trip output. These outputs can be set by the Voltage:V
O/P Phases setting to operate from any phase operation, or only when all phase elements operate.
The Voltage:V Hysteresis setting specifies the percentage above or beneath the (Voltage:V Ph-Ph Setting)/(Voltage:V Ph-
N Setting), setting at which the element resets. For example, an element with Voltage:V Operation set to Overvoltage,
Voltage:V Setting of 100 V and Voltage:V Hysteresis of 1 % will nominally operate above 100 V and reset below 99 V. If
Voltage:V Operation is set to Undervoltage, the element will operate below 100 V and reset above 101 V.
The voltage elements are set in terms of the directly measured voltage. If used for phase-phase connection the
voltage elements will be phase-phase; if used for phase-neutral connection the voltage elements will be phase-
neutral.
The voltage elements provide pole-by-pole outputs that can be used to block the appropriate overcurrent element
using the Status Config.:P/F xxxx Inhibit settings. Note that if used with phase-phase connection of the voltage inputs,
the Vab element will block the phase A overcurrent element, Vbc will block phase B overcurrent and Vca will
block phase C overcurrent.
©2013 Siemens Protection Devices Limited
Range (bold = default)
OFF, ON
+30, +45
-90, -89...+45...+90
0, -15, -45, -65
-90, -89...-15...+90
0, -15, -45, -65
OFF, 0.1 ... 0.5
Range (bold = default)
_, 1 for each output contact
(default: _ _ _ _ _ _ _ _ _ _ _)
_, 1 for each output contact
(default: _ _ _ _ _ _ _ _ _ _ _)
7SG11 Argus Technical Reference
Units Notes
Type I element.
Type II element.
Type I element.
Type II element.
Type 1 only
sec
Units Notes
Argus 2 single-pole directional
SEF only.
P20007 Page 36 of 71