NR BR 923
Specification Moving Iron Direct Current Polar Line Relays for Railway Signalling
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| Organization: | NR |
| Publication Date: | 1 February 1964 |
| Status: | active |
| Page Count: | 9 |
scope:
This specification covers moving-iron direct current polar line relays for railway signalling. It provides for relays having up to two contact arms as standard. Relays having contact arrangements or resistance different from those regarded as standard may be obtained to this specification by arrangement between the purchaser and manufacturer.
Document History
NR BR 923
February 1, 1964
Specification Moving Iron Direct Current Polar Line Relays for Railway Signalling
This specification covers moving-iron direct current polar line relays for railway signalling. It provides for relays having up to two contact arms as standard. Relays having contact arrangements or...
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