The system of electrical connection is formed by one or more units coupled to each other, each one of them comprising a conductive piece (1) and an insulating piece (2) in which is housed the aforementioned conductive piece, both pieces (1 and 2) being free-standing which permits the assembly both to...http://www.google.de/patents/US6705888?utm_source=gb-gplus-sharePatent US6705888 - Electric connection system between modules for protecting electric distribution circuits