Siemens 7SR21 Manual page 50

7SR21 & 7SR22 Argus Commissioning and Maintenance
Op. Time
27/59
DTL D.O. P.U. D.O 2x Vs (OV)
Phase setting U/O Hyst. Tolerence
(sec) (calculated) Volts Volts 0.5x Vs
(Volts)
(UV)
V (V )
4 x
2.13.3.1 Element Blocking
The Vx Under/Over Voltage elements can be blocked by Binary Input Inhibit and VT Supervision. This
functionality should be checked.
Element BI Inhibits VT Supervision
27/59x
Check correct indication, trip output, alarm contacts, waveform record.
©2010 Siemens Protection Devices Limited Chapter 6 Page 50 of 69