34
4.2.7 Phase-Phase Voltages
Phase-Phase Voltage
requirements. In this screen, V
RS
, V
TS
, V
TR
voltage values and their phase angles and
frequency values are given. The display for Phase-Neutral Voltages is as follows:
Image 4-9 Phase-Neutral Voltages
4.2.8 I
0
- I
1
- I
2
I0 - I1 - I2 currents refer to zero, positive and negative sequence currents respectively.
Unbalanced currents flowing in a certain sequence in the system; where positive is shown as
negative and zero sequence currents. The use of these currents in short circuit calculations
increases the efficiency.
The% (I2 / I1) value displayed on the screen is used when proportional control and protection
against unbalanced load is required. The display of currents, phase angles and frequency is
shown below:
I
0
I
1
I
2
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