Siemens 7SR21 Manual page 52

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Phase setting U/O
(Volts)
NPS
2.13.4.1 Element Blocking
The NPS Overvoltage element can be blocked by Binary Input Inhibit. This functionality should be checked.
Check correct indication, trip output, alarm contacts, waveform record.
©2010 Siemens Protection Devices Limited
DTL D.O.
Hyst.
(sec) (calculated)
Element
47-1
47-2
7SR21 & 7SR22 Argus Commissioning and Maintenance
P.U. D.O Op. Time
Volts Volts
Tolerence
2x Vs
BI Inhibits
Chapter 6 Page 52 of 69