Siemens 7SR224 Technical Manual page 278

F U/O DTL
(Hertz) (sec)
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 UVG Setting
(Volts)
U/O
Freq
2.12.8.1 Element Blocking
The U/O Frequency elements can be blocked by Binary Input Inhibit. This functionality should be checked.
Element
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.
©2010 Siemens Protection Devices Limited
Hyst. D.O. P.U.
(calc.) Freq
Hertz
Freq element Blocked
Used for test Volts (D.O.)
7SR224 Argus Commissioning & Maintenance Guide
D.O. Operate UV
Freq. Time Guard
Hertz +/- 0.5Hz
Unblocked Volts (P.U.)
BI Inhibits
NOTES
NOTES
Chapter 6 Page 52 of 73