Siemens 7SR12 Argus User Manual

7SR11 & 7SR12 Description Of Operation
Chapter 1 Page 44 of 88 ©2017 Siemens Protection Devices Limited
Forward
Reverse
50SEF-n Dir.
Control
Non-Dir
1
&
&
50SEF-n Dir En
67SEF Fwd
67SEF Rev
50SEF-n VTS Action
Off
Non-Dir
Inhibit
VT Fail
&
&
&
1
>
Compensated
angle
Wattmetric
Inhibit Wattmetric
V
0
I
4
(I
SEF
)
3I
0
cos(θ-θ
c
)
50SEF-n
>
c
50SEF-n Setting
50SEF-n Delay
I
4
(I
SEF
)
General Pickup
Inhibit 50SEF-n
&
50SEF-n Element
Enabled
Disabled
50SEF-n Dir En
&
79 P/F Inst Trips
= 50SEF-n
79 P/F Prot’n Trip n
= Delayed
AUTORECLOSE
Ires Select
Ires Real
Ires
3I
0
cos(θ-θ
c
)
Wattmetric Block
67SEF Charact.angle
Wattmetric Block
67SEF Wattmetric Power
Figure 3-13 Logic Diagram: 7SR12 SEF Instantaneous Element

Siemens 7SR12 Argus Specifications

General

Brand	Siemens
Model	7SR12 Argus
Category	Protection Device
Language	English