Siemens 7SR12 Argus - Page 327

7SR11 & 7SR12 Commissioning and Maintenance Guide
©2017 Siemens Protection Devices Limited Chapter 6 Page 43 of 72
Phas
e
Is
(Amps)
DTL
(sec)
P.U. Current
Amps
Tolerance
Operate Time
0.5 x Is
Tolerance
I
L1
(I
A
)
I
L2
(I
B
)
I
L3
(I
C
)
I4(I
G
)
2.12.1.1 Element Blocking
The Undercurrent elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
BI Inhibits
37-1
37-2
37G-1 or 37SEF-1
37G-2 or 37SEF-2
2.12.1.2 Element Blocking from current guard
The elements can be blocked by undercurrent guard function. This functionality should be checked.
Element
Guard Setting
Blocked
37-1
37-2
Check correct phase indication, trip output, alarm contacts, waveform record.