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Phas
Is
DTL
e
(Amps)
(sec)
I
(I
)
L1
A
I
(I
)
L2
B
I
(I
)
L3
C
I4(I
)
G
3.8.1
E
B
LEMENT
LOCKING
The Undercurrent elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
37G-1 or 37SEF-1
37G-2 or 37SEF-2
3.8.2
E
B
LEMENT
LOCKING FROM CURRENT GUARD
The elements can be blocked by undercurrent guard function. This functionality should be checked.
Element
37-1
37-2
Check correct phase indication, trip output, alarm contacts, waveform record.
Unrestricted ©2018 Siemens Protection Devices Limited
P.U. Current
Tolerance
Amps
37-1
37-2
Guard Setting
7SR18 Commissioning & Maintenance Guide
Operate Time
0.5 x Is
BI Inhibits
Blocked
Tolerance
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