FREMGANGSMAATE TIL IDRIFTSETTELSE AV TOSIDIG FJERNMATNING AV MELLOMSTASJONER I ET ANLEGG INNEN INFORMASJONSOVERFOERINGSTEKNIKKEN, SAMT KOBLINGSANORDNING TIL UTFOERELSE AV FREMGANGSMAATEN

摘要

Method and apparatus for start-up of reciprocal remote supply feeding of intermediate stations utilizing DC current series feeding. In the operation of remote feeding systems of this type, the switch-on operation for reasons of safety for the individuals, must be accomplished only after testing the remote feeding circuit for freedom of faults. For this purpose the invention provides a test current circuit delivered by one feed circuit which triggers a transmission and delivery of a remote feed current in the other feed circuit which in turn causes in the first feed circuit a change-over switch to operate to switch from test current to remote feed current. The apparatus and method is particularly suitable for the remote feeding of intermediate amplifiers in transmission line sections of communication engineering systems.