Siemens Solkor 7PG2113 Technical Manual page 255

Where two NPS elements are being used with different settings, it is convenient to test the elements with the
highest settings first. The elements with lower settings can then be tested without disabling the lower settings.
NPS Overvoltage can be tested using a normal 3P balanced source. Two phase voltage connections should be
reversed so that the applied balanced 3P voltage is Negative Phase Sequence.
If the 47-n delay is small, gradually increased the applied balanced 3P voltage until element operates.
If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, check operation
Apply 2x setting current if possible and record operating time
Phase 27/59 U/O
setting
(Volts)
NPS
2.15.1.1 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.
©2012 Siemens Protection Devices Limited
DTL Hyst. D.O.
(sec) (calculated)
Table 2.15-1
Element
47-1
47-2
Table 2.15-2
7PG2113/4/5/6 Commissioning & Maintenance
P.U. D.O Op. Time
Volts Volts
47 Test Results
Element Blocking
Tolerance
2x Vs
BI Inhibits
Chapter 6 Page 57 of 77