CHANGE-OVER SWITCH AND RENEWAL METHOD FOR RAILROAD SIGNAL PROTECTIVE DEVICE

PROBLEM TO BE SOLVED: To safely and smoothly change over a connection state of an actual operation before renewal to a connection state of testing after renewal in a short time and inexpensively in the case of renewal of the railroad signal protective device. SOLUTION: When replacing a first rack 10 with a third rack 30 among the first rack 10 and a second rack 20 connected with an inter-rack cable 60, a fifth rack 50 addition to a forth rack 40 is temporarily installed, the change-over switch 90 annexed to that is manually operated and the change over between the first connection state and the second connection state is performed. The change-over switch 90 is provided with a connection part 93 for attaching/detaching, a switch part 92 changing over the connection state by dividing the pins into four groups, and an operation part 91 for manual operation. COPYRIGHT: (C)2005,JPO&NCIPI