© OMICRON 2024 Page 18 of 25
4 Cable impedance measurements
The following section describes how to perform the actual cable impedance measurement.
Chapter 4 of the CP CU1 User Manual [2] contains a detailed explanation how the model parameters and
the k-factors for protection relays are calculated.
4.1 Setup
Death or severe injury caused by high voltage or current possible.
Ensure that you follow all safety rules in this application note and the
according product manuals for COMPANO 100 and CP GB1 (described in
the CP CU1 product manual).
Do not perform the measurement before you have successfully completed
all necessary steps described in chapter 3 .
Use a grounding set to ground the power line at the near end whenever you
handle the measurement setup inside the danger zone (for example when
changing connections at the CP GB1 between measurement loops).
Foll
ow the instructions in chapter 3 Connecting COMPANO 100 and CP GB1 to a power cable on
page 11 in order to connect the CP CU1 to the power cable under test and check the four criteria.
4.2 Load Template
This application note comes with two pre-defined COMPANO configuration profiles for 50 Hz and 60 Hz
mains frequency.
Frequency 1
Frequency 2
-50.occp
-60.occp
Table 1: Measurement frequencies and configuration profiles
Select the applicable file, deepening on the mains frequency.
Copy the file to a USB flash drive.
Insert the USB flash drive on COMPANO 100.
Load the configuration profile (See COMPANO 100 User Manual [1] for more information).
For the measurement, the previously loaded FLEX sequence is used.
Select the FLEX application module.
To Next Page
Loading...
Need help?
General
