Siemens 7SR12 Argus - Page 337

7SR11 & 7SR12 Commissioning and Maintenance Guide
©2017 Siemens Protection Devices Limited Chapter 6 Page 53 of 72
Freq
(Hertz)
U/O
Delay
(sec)
Hyst.
D.O.
(calc.)
P.U.
Freq
(Hertz)
D.O.
Freq.
(Hertz)
Operate
Time
@ +/- 0.5Hz
UV
Guard
NOTES
If the element is set as 81-nU/V Guarded, this setting can be tested by applying the test voltage at a level below
the 81 U/V Guard Setting at a frequency in the operate range. Increase the voltage until the relay operates.
UVG
Setting
(Volts)
Freq element
Used for test
Blocked
Volts (D.O.)
Unblocked
Volts (P.U.)
NOTES
2.15.1.1 Element Blocking
The U/O Frequency elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
BI Inhibits
81-1
81-2
81-3
81-4
81-5
81-6
Check correct indication, trip output, alarm contacts, waveform record.
When testing is complete reinstate any of the disabled functions.