When the relay circuit for the railway signaling equipment and the relay interlocking device

摘要

PROBLEM TO BE SOLVED: To constitute a relay circuit for a railroad signal security device used in the relay interlocking device without using an expensive slow release relay.;SOLUTION: The relay circuit for the railroad signal security device operates a second relay through a contact point of a first relay when the first relay is operated, and self-holds the second relay through the contact point of the second relay. The second relay connects another contact point in the state contacting with one contact point when a common contact point is switched from one contact point in a connecting state to another contact point, and acts so as to separate from the one of the contact points after finishing the connection. These relays are characterized to be CT type relays.;COPYRIGHT: (C)2003,JPO