literally, but why not? There are no professional terms in the question.

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Note added at 3 days13 hrs (2010-10-25 19:51:47 GMT)
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You may either speak "interconnections exempted" or "exempted interconnections".

Examples:

5.2 Charge on access to interconnection capacity
ERGEG proposed Guidelines When setting up cross-border exchanges of balancing energy after gate closure of day ahead and intraday markets, any charge on access to interconnection capacity for balancing energy shall be prohibited. Only new interconnections exempted under Article 7 of Regulation (EC) 1228/2003 may, upon request, be exempted from this provision.
http://www.energy-regulators.eu/portal/page/portal/EER_HOME/...
(2 Google hits)
http://www.google.de/search?hl=de&lr=&as_qdr=all&q="intercon...

5.5.1 Exempted interconnections (as to Article 7 of Regulation (EC) 1228/2003) shall follow the connection requirements set by the TSOs. These requirements shall be non-discriminatory. They shall be clearly and transparently communicated to those requesting connection.
http://www.energy-regulators.eu/portal/page/portal/EER_HOME/...
(3 Google hits)
http://www.google.de/search?hl=de&lr=&as_qdr=all&q="exempted...

3 Google hits or 2, makes no significant difference.

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Note added at 3 days13 hrs (2010-10-25 20:01:55 GMT)
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Two Google hits also for "exempt interconnections"

Under the market and hybrid redispatch models, one may exempt interconnections from providing constrained-off bids.
/url?sa=t&source=web&cd=2&ved=0CBwQFjAB&url=http%3A%2F%2Fwww.rijksoverheid.nl%2Fbestanden%2Fdocumenten-en-publicaties%2Frapporten%2F2009%2F11%2F16%2Frapport-d-cision-en-brattle-group-a-system-for-congestion-management-in-the-netherlands%2F9202135-bijlage4.pdf&ei=A-DFTPrmOZDDswbvqo3qDQ&usg=AFQjCNFy_fYzccY-hIWv1ozS11Qv6fv3dw

Summary of the contributions to the French Energy Regulatory Commission's public consultation dated the 3rd of May 2010 on the enforcement of article 7 of Regulation (EC) n° 1228/2003 dated 26 th of June 2003 and on conditions for access to the French public electricity transmission grid for new exempt interconnections
:
- The promotion of integration of European electricity markets, allowing new exempted interconnexions to
contribute positively.
url?sa=t&source=web&cd=1&ved=0CBcQFjAA&url=http%3A%2F%2Fwww.cre.eu%2Fen%2Fcontent%2Fdownload%2F10179%2F171083%2Ffile%2F100916SyntheseCPInterconnexions-en.pdf&ei=A-DFTPrmOZDDswbvqo3qDQ&usg=AFQjCNF7KcHFsA72weSIWrHFKz6KvGsmFw

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Note added at 3 days14 hrs (2010-10-25 20:30:09 GMT)
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And what says the source text of the European Directive?

Regulation (EC) No 1228/2003 of the European Parliament and of the Council of 26 June 2003 on conditions for access to the network for cross-border exchanges in electricity (Text with EEA relevance)
:
Article 7
New interconnectors
1. New direct current interconnectors may, upon request, be exempted from the provisions of Article 6(6) of this Regulation and Articles 20 and 23(2), (3) and (4) of Directive 2003/54/EC under the following conditions:
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:...