7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 10 of 82 © 2013 Siemens Protection Devices Limited
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.
Applied Current Applied Voltage
I
A
I
B
I
C
I
G
I
SEF
V
A
/V
AB
V
B
/V
BC
V
C
/V
CB
V
X
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.
ZPS NPS
Voltage
Current
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