Nominal
current In
1…
5000A
0.01A 100.00A Protected object nominal current in amperes. (This setting is visible if “Scale meas
to In” setting is set to “Object In p.u.”)
IL1
Polarity
0:-
1:Invert
-
0:-
IL1 ( rst current) measurement channel polarity (direction) selection. Default
setting is that positive current flow is from connector 1 to connector 2 and the
secondary currents starpoint is towards line.
IL2
Polarity
0:-
1:Invert
-
0:-
IL2 (second current) measurement channel polarity (direction) selection. Default
setting is that positive current flow is from connector 3 to connector 4 and the
secondary currents starpoint is towards line.
IL3
Polarity
0:-
1:Invert
-
0:-
IL3 (third current) measurement channel polarity (direction) selection. Default
setting is that positive current flow is from connector 5 to connector 6 and the
secondary currents starpoint is towards line.
CT
scaling
factor P/S
-
-
-
IED feedback value, this is the calculated scaling factor for primary /secondary
current ratio
CT
scaling
factor
NOM
-
-
-
IED feedback value, this is the calculated ratio in between of set primary and
nominal currents.
Ipu
scaling
primary
-
-
-
IED feedback value, scaling factor from p.u. value to primary current.
Ipu
scaling
secondary
-
-
-
IED feedback value, scaling factor from p.u. value to secondary current.
Table. 5.2.1. - 7. Settings of the residual I01 CT scaling
Name
Range Step Default
Description
I01 CT
primary
1…
5000.0A 0.1A
100.0A
Rated primary current of the CT in amperes.
I01 CT
secondary
0.2…
10.0A
0.1A
5.0A
Rated secondary current of the CT in amperes.
I01 Polarity
0:-
1:Invert
-
0:-
I01 (coarse residual) measurement channel polarity (direction) selection. Default
setting is that positive current flow is from connector 7 to connector 8.
CT scaling
factor P/S
-
-
-
IED feedback value, this is the calculated scaling factor for primary /secondary
current ratio
Table. 5.2.1. - 8. Settings of the residual I02 CT scaling
Name
Range Step Default
Description
I02 CT
primary
1…
5000.0A 0.1A
100.0A
Rated primary current of the CT in amperes.
I02 CT
secondary
0.1…
10.0A
0.1A
5.0A
Rated secondary current of the CT in amperes.
I02 Polarity
0:-
1:Invert
-
0:-
I02 ( ne residual) measurement channel polarity (direction) selection. Default
setting is that positive current flow is from connector 9 to connector 10.
CT scaling
factor P/S
-
-
-
IED feedback value, this is the calculated scaling factor for primary /secondary
current ratio
Measurements
Following measurements are available from the measured current channels.
Table. 5.2.1. - 9. Per unit phase current measurements
Name
Range
Step
Description
AQ-T257
Instruction manual
Version: 2.00
© Arcteq Relays Ltd
20