IEEE C37.12-2018 PDF

This guide is for development of specifications that apply to all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. This document is intended as a guide for use in developing specifications for ac high-voltage circuit breakers. This guide is for specifications that apply to all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V. The imperative mode of the language is illustrative of that used in specifications. It does not imply that this document is anything other than advisory in its scope. Revision Standard - Active. Specifications that apply to all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 volts are covered in this document. This document is issued only as a guide for use in compiling specifications for ac high-voltage circuit breakers. The imperative mode of the language is illustrative of that used in specifications.