Name
Unit
Range
Step
Default
Description
I02 CT
secondary A
0.001…10 0.00001 0.2
The rated secondary current of the current transformer.
I02
Polarity
-
0: -
1: Invert
-
0: -
The selection of the sensitive residual measurement channel's (I02)
polarity (direction). The default setting is for the positive current to flow
from connector 9 to connector 10.
CT
scaling
factor P/S
-
-
-
-
A relay feedback value; the calculated scaling factor that is the ratio
between the primary current and the secondary current.
Measurements
The following measurements are available in the measured current channels.
Table. 5.2.1 - 11. Per-unit phase current measurements.
Name
Unit
Range
Step
Description
Phase current
ILx
("Pha.curr.ILx")
× In
0.000…1250.000 0.001 The RMS current measurement (in p.u.) from each of the phase current
channels.
Phase current
ILx TRMS
("Pha.curr.ILx
TRMS")
× In
0.000…1250.000 0.001 The TRMS current (inc. harmonics up to 31
st
) measurement (in p.u.)
from each of the phase current channels.
Peak-to-peak
current ILx
("P-P curr.ILx")
× In
0.000…500.000
0.001 The peak-to-peak current measurement (in p.u.) from each of the phase
current channels.
Table. 5.2.1 - 12. Primary phase current measurements.
Name
Unit
Range
Step
Description
Primary phase
current ILx
("Pri.Pha.curr.ILx")
A
0.000…1000000.000 0.001 The primary RMS current measurement from each of the phase
current channels.
Primary phase
current ILx TRMS
("Pha.curr.ILx
TRMS Pri")
A
0.000…1000000.000 0.001 The primary TRMS current (inc. harmonics up to 31
st
)
measurement from each of the phase current channels.
Table. 5.2.1 - 13. Secondary phase current measurements.
Name
Unit
Range
Step
Description
Secondary phase
current ILx
"Sec.Pha.curr.ILx")
A
0.000…300.000 0.001 The primary RMS current measurement from each of the phase
current channels.
Secondary phase
current ILx TRMS
("Pha.curr.ILx TRMS
Sec")
A
0.000…300.000 0.001 The primary TRMS current (inc. harmonics up to 31
st
)
measurement from each of the phase current channels.
Table. 5.2.1 - 14. Phase current angle measurements.
Name
Unit
Range
Step
Description
Phase angle ILx
("Pha.angle
ILx")
deg
0.000…360.000 0.001 The phase angle measurement from each of the three phase current
inputs.
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
24
© Arcteq Relays Ltd
IM00028
Summary of Contents for AQ-T256
Page 1: ...AQ T256 Transformer protection IED Instruction manual...
Page 2: ......
