BS 561:1951

$86.31

Specification for alternating-current line relays double-element 3-position (for railway signalling)

Published By	Publication Date	Number of Pages
BSI	1951	12

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Description

2-element, 3-position relays for railway signalling circuits up to 250 volts. Mounting, mechanical clearances, bearings, coils, contact capacity, contact pressure, contact resistance, flexible connections, terminals and terminal markings, insulation tests, pick-up and drop away values, labelling and marking, finish, pointer scale.

Additional information

Status	Withdrawn
Pages	12
Publication Date	1951-06-15
Withdrawn Date	2014-07-08
ISBN	0 580 00667 0
Standard Number	BS 561:1951
Title	Specification for alternating-current line relays double-element 3-position (for railway signalling)
Descriptors	Railway fixed equipment, Electric contacts, Signal devices, Repeaters, Clearances, Contact resistance, Railway signals, Railway equipment, Electrical equipment, Relays, Pressure, Switchgear, Dimensions, Seatings, Alternating current, Electrical testing, Electric terminals, Voltage, Marking
Publisher	BSI
Committee	GEL/9
ICS Codes	45.040 - Materials and components for railway engineering

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BS 561:1951

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