Siemens 7SR18 Solkor - Element Blocking from Current Guard

7SR18 Commissioning & Maintenance Guide
Unrestricted ©2018 Siemens Protection Devices Limited Page 41
of
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
)
3.8.1 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
3.8.2 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.