Siemens SIPROTEC 5, Manual

Page: 116 / 490

Application and Setting Notes for Measuring Point Current 1-Phase
(I-1ph)
If you insert a Measuring point I 1-ph in DIGSI 5, you must route a current to the measuring point under
Name of the device → Measuring-points routing → Current-measuring points.
You can only route the current
Ix
.
Parameter: Rated primary current
•
Default setting
(_:2311:101) Rated primary current
=
1000 A
With the
Rated primary current
parameter, the active primary rated current of the current transformer
is set.
If you change the setting of the parameter
Rated primary current
, for example, from 1000 A to 500 A
using the operation panel, restart the device to ensure that the change of the current transformer ratios was
accepted.
Parameter: Rated secondary current
•
Default setting
(_:2311:102) Rated secondary current
=
1 A
With the
Rated secondary current
parameter, you set the current secondary rated current of the current
transformer.
Parameter: Current range
•
Default setting
(_:2311:103) Current range
=
100 x IR
The
Current range
parameter allows you to set the dynamic range for the current input. Please retain the
default setting for power-system protection applications.
Parameter: Tracking
•
Default setting
(_:2311:105) Tracking
=
active
With the parameter
Tracking
, you specify whether you would like to work with the sampling-frequency
tracking function.
Parameter Value Description
active
If the parameter
Tracking
=
active
has been set, the measuring point
will be included when determining the sampling frequency.
Note: If the parameter
Tracking
=
active
, the determined sampling
frequency applies to all functions in the device not using fixed sampling
rates.
inactive
If the channels of the measuring point are not to be considered for deter-
mining the sampling frequency, please select the setting value
inactive
.
Parameter: Term. 1,3,5,7 in dir. of obj.
•
Default setting
(_:2311:116) Term. 1,3,5,7 in dir. of obj.
=
yes
With the
Term. 1,3,5,7 in dir. of obj.
parameter, you define the direction of the current. If you set
the parameter
Term. 1,3,5,7 in dir. of obj.
=
yes
, the direction of the current to the protected
object is defined as
forward
.
Parameter: Magnitude correction
•
Default setting
(_:3841:103) Magnitude correction
=
1.000
When using the
Magnitude correction
parameter, you adjust the magnitude (magnitude correction) for
the current input. This allows you to correct the tolerances of the primary current transformer phase-selec-
5.5
Power-System Data
5.5 Application and Setting Notes for Measuring Point Current 1-Phase (I-1ph)
116 SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017