Secondary positive sequence
current
("Sec.Pos.seq.curr.")
0.00…
300.0 A
0.01
A
The secondary measurement from the calculated positive
sequence current.
Secondary negative sequence
current
("Sec.Neg.seq.curr")
0.00…
300.0 A
0.01
A
The secondary measurement from the calculated negative
sequence current.
Secondary zero sequence
current
("Sec.Zero seq.curr.")
0.00…
300.0 A
0.01
A
The secondary measurement from the calculated zero sequence
current.
Table. 5.2.1. - 21. Sequence phase angle measurements.
Name
Range
Step
Description
Positive sequence current angle
("Pos.seq.curr.angle")
0.00…360.0 deg
0.01 deg
The calculated positive sequence current angle.
Negative sequence current angle
("Neg.seq.curr.angle")
0.00…360.0 deg
0.01 deg
The calculated negative sequence current angle.
Zero sequence current angle
("Zero seq.curr.angle")
0.00…360.0 deg
0.01 deg
The calculated zero sequence current angle.
Table. 5.2.1. - 22. Harmonic current measurements.
Name
Range
Step Default
Description
Harmonics
calculation values
("Harm Abs.or Perc.")
0: Percent
1: Absolute
-
0:
Percent
De nes whether the harmonics are calculated as percentage or
absolute values.
Harmonics display
0: Per unit
1: Primary A
2:
Secondary
A
-
0: Per
unit
De nes how the harmonics are displayed: in p.u values, as primary
current values, or as secondary current values.
Maximum harmonics
value
("IxxMaxH")
0.00...100
000.00 A
0.01
A
-
Displays the maximum harmonics value of the selected current
input ILx or I0x.
Fundamental
frequency
("Ixx Fund")
0.00...100
000.00 A
0.01
A
-
Displays the current value of the fundamental frequency from the
selected current input ILx or I0x.
Ixx harmonics
(2
nd
...31
st
harmonic)
0.00…100
000.00 A
0.01
A
-
Displays the selected harmonic from the current input ILx or I0x.
5.2.2. Voltage measurement and scaling
The voltage measurement module (VT module, or VTM) is used for measuring the voltages from
voltage transformers. The measured values are processed into the measurement database and they
are used by measurement and protection functions (the protection function availability depends of the
relay type). It is essential to understand the concept of voltage measurements to be able to get correct
measurements.
AQ-E215
Instruction manual
Version: 2.01
© Arcteq Relays Ltd
46
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