Siemens 7SR12 Argus - Page 341

7SR11 & 7SR12 Commissioning and Maintenance Guide
©2017 Siemens Protection Devices Limited Chapter 6 Page 57 of 72
Power
(xSn)
U/O
DTL
(sec)
P.U.
Power
(xSn)
D.O.
Power
(xSn)
Operate
Time
+/- 0.5Hz
UC
Guard
NOTES
32S-1
32S-2
If the element is set as 32S-n U/C Guarded, the setting can be tested by applying the test current at a level below
the 32S-n U/C Guard Setting at a power in the operate range. Increase the current until the relay operates.
UCG
UCG
Setting
(xIn)
Power element
Used for test
Blocked
Current
(D.O.)
Unblocked
Current
(P.U.)
NOTES
U/O
Power
2.17.1.1 Element Blocking
The U/O Power elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
BI Inhibits
32S-1
32S-2
Check correct indication, trip output, alarm contacts, waveform record.
When testing is complete reinstate the disabled functions.