IEEE C37.12-1952 - ASA American Standard Guide Specifications for Alternating Current Power Circuit Breakers
Standard Details
These specifications are intended as a reference for purchasers and users of circuit breakers in the preparation of requests for quotations and as a reference for manufacturers and vendors in submitting bids. 12-1.2 These specifications apply to all types of alternating- current power circuit breakers (indoor and outdoor) having an interrupting rating of 50 mva or higher and a voltage rating above 1500 volts. Individual clauses apply to all types except where otherwise indicated. 12-1.3 These requirements of necessity include some elements of construction and materials, but are not intended to preclude ingenuity of design or improvement.
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