BS 9151:1972
Rules for the preparation of detail specifications for all-or-nothing electromechanical relays of assessed quality. Full and basic assessment levels
Lists the ratings, characteristics, inspection requirements and supplementary information for all-or-nothing electromechanical relays of assessed quality which are required to be included as minimum mandatory requirements, in addition to that required by the general rules given in Section 2 of BS 9150 in any detail specification for these relays.
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