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200 10$aASA C37.12-1952 $eASA American Standard Guide Specifications for Alternating Current Power Circuit Breakers /$fIEEE
210  1$a[Place of publication not identified] :$cIEEE,$d1951.
215   $a1 online resource
330   $aThese 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. 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. These requirements of necessity include some elements of construction and materials, but are not intended to preclude ingenuity of design or improvement.
517   $aASA C37.12-1952
606   $aElectric circuit-breakers
606   $aElectric currents
615  0$aElectric circuit-breakers.
615  0$aElectric currents.
676   $a621.317
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