1.1 The Problems of Standardization

Introduction

1.1 The Problems of Standardization

The industries using relays are many and varied. They are also somewhat isolated from one another with respect to having a common relay language. Over the years, each company , by usage and practice, has tended to establish differing designations for identical or similar relay items. The desirability for a standardization of relay terms, definitions and symbols is thus apparent. There are several sources for definitions; the C37 subcommittee on protective relays, C83 committee on Components for Electronic Equipment, and IEEE Standards Coordinating Committee on Definitions (SCC10) which as published ANSI/IEEE Std 100-1984 Dictionary of Electrical and Electronics Terms. IEC has Technical Committee 41 on all types of relays and publication 50 (446) is a chapter of definitions on electrical relays. These sources have been used in the definitions given in this Chapter 1. [All chapters were carefully reviewed and modified as necessary to standardize and comply with the latest ANSI standards-e.g., alternating current abbreviated as "ac"-ANSI Y19-10.]