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| Standard No |
BS561:1951 |
| Title of Standard |
Specification for alternating-current line relays double-element 3-position (for railway signalling) |
| ISBN |
058000667 0 |
| Date of Publication |
15/06/51 |
| Approx Pages |
16 |
| Description |
Relays, Switchgear, Railway signals, Repeaters, Railway equipment, Railway fixed equipment, Dimensions, Seatings, Clearances, Electric contacts, Contact resistance, Pressure, Electric terminals, Marking, Electrical testing, Voltage, Alternating current, S |
| Cross references |
BS 442 |
| International Equiv (If Applicable ) |
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| Replaces Standards : |
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| Replacement Notes |
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| Now Replaced By |
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| Replaced by Notes |
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| Committee Ref |
GEL/9 |
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