Ac Energising Quantities - Siemens 7SR242 Duobias Technical Manual

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
W1-I
A
Secondary
Primary
Apply 3P balanced Current at nominal levels and ensure that the measured Zero Phase Sequence and Negative
Phase Sequence quantities are approximately zero.
Current
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Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide
W1-I W1-I I
B C G1
ZPS
W2-I W2-I W2-I
A B
NPS
Applied
Voltage
I V (V )
C G2 1 X
Chapter 6 Page 11 of 62