Ac Energising Quantities - Siemens Argus 7SR21 Technical Manual

7SR210 & 7SR220 Commissioning & Maintenance Guide
1.4

AC Energising Quantities

Voltage and current measurement for each input channel is displayed in the Instrumentation Mode sub-menus,
each input should be checked for correct connection and measurement accuracy by single phase secondary
injection at nominal levels. Ensure that the correct instrument displays the applied signal within limits of the
Performance Specification.
I
A
Secondary
Primary
Apply 3P balanced Current and Voltage at nominal levels and ensure that the measured Zero Phase Sequence
and Negative Phase Sequence quantities are approximately zero.
Voltage
Current
Page 10 of 82
Applied Current
I I I
B C G
ZPS
Applied Voltage
I V /V V /V
SEF A AB B
© 2013 Siemens Protection Devices Limited
V /V V
BC C CB X
NPS