BS-1745 › Specification for alternating-current relays for railway signalling: track relays (double-element, 2-position), line relays (single-element, 2-position)
Specification for alternating-current relays for railway signalling: track relays (double-element, 2-position), line relays (single-element, 2-position)
To find similar documents by classification:
45.040 (Materials and components for railway engineering)
Document Number
BS-1745
Revision Level
PD 4020
Status
Superseded
Publication Date
Jan. 1, 1961