[bug] CIM importer does not process EQ_BD boundary CNs correctly

[AnkurArohi]

Bug report checklis

• Searched the issues page for similar reports

• Read the relevant sections of the documentation

• Browse the tutorials and tests for usefull code snippets and examples of use

• Reproduced the issue after updating with pip install --upgrade pandapower (or git pull)

• Tried basic troubleshooting (if a bug/error) like restarting the interpreter and checking the pythonpath

Reproducible Example

Simply use a EQ_BD file together with other profiles in cim importer ,
compare the no. and attributes of switches with and without the EQ_BD file importer

Issue Description and Traceback

Pandapower has problem in cim import if EQ_BD file is also used

Something went wrong at switches, seems like that terminals for connection with connectivity nodes are missing!

The switch with RDF ID _03ac8 has 3 Terminals!
The switch data:
index rdfId
504 11799 _03ac83
505 11797 _03ac83bb
506 11798 _03ac83bb-6

                             name  \

504 3 Ltg 1
505 3 Ltg 2
506 3 Ltg 3

The modelled network has no switch anymore.

If there is no EQ_BD used then it works.

Expected Behavior

The switches count and attributes should remain same with and without EQ_BD import

Installed Versions

• python version: 3.12 *

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