Relays having up to four neutral contact-arms and up to four polar contact-arms. Construction (overall dimensions, electrical tests, performance characteristics); arrangement, marking of terminals.Cross References:BS 442
BS 519:1950
Original price was: $160.02.$80.00Current price is: $80.00.
Specification for tractive armature direct current neutral-polar line relays for railway signalling
BSI Group , 07/14/1950
Pages: 14


