Transfer apparatus for energy sources in railway track circuits

Details Transfer apparatus for energy sources in railway track circuits Transfer apparatus for energy sources in railway track circuits

H - Electricity

02

J

346/31

H02J 9/06 (2006.01)

Patent

CA 1111538

TRANSFER APPARATUS FOR ENERGY SOURCES FOR RAILWAY TRACK CIRCUITS ABSTRACT OF THE DISCLOSURE A circuit arrangement for automatically transferring from a main to a standby source for supplying a variable load net- work, such as a railway track circuit comprising first and second monitoring channel apparatus to detect the level of the normal output and load current, respectively. Source output varies from normal to low level and load current from low to high level as load network varies between relatively no load and heavy load conditions. The monitor channel detection sig- nals are checked through a logic circuit so that if at least one exceeds a predetermined level indicating the operable condition of the principal source, a registry device is actu- ated to hold the energy supply leads to the load network con- nected to the principal source. If neither monitor detects an operable condition of the source, the registry device is operated to activate, and transfer the load energy supply leads to, a standby source.

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