BS 1745:1951
Withdrawn
Specification for alternating-current relays for railway signalling: track relays (double-element, 2-position), line relays (single-element, 2-position)
Hardcopy , PDF
English
06-08-1951
08-02-2013
Co-operating organizations
Foreword
Specification
1 Scope
2 Definitions
3 General requirements
4 Dimensions
5 Mounting
6 Mechanical clearances
7 Bearings
8 Coils
9 Contacts
10 Contact capacity
11 Contact clearances
12 Contact rating
13 Contact pressure
14 Contact resistance
15 Flexible connections
16 Terminals
17 Terminal markings
18 Insulation
19 Insulation tests
20 Operating values (a) pick-up
(b) drop-away
21 Finish
22 Labelling and marking
23 Pointer scale
Appendix
Information to be supplied by the purchaser
Information to be supplied by the manufacturer
For circuits not exceeding 250 V. Relays with or without a local element.
| Committee |
GEL/9
|
| DevelopmentNote |
Supersedes BS 520(1933) and BS 557(1934). (06/2005) Inactive for the new design. (02/2009)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| Supersedes |
| Standards | Relationship |
| UNE-EN 4165-020:2007 | Identical |
| BS 442:1950 | Specification for terminals for electrical apparatus for railway signalling purposes |
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