GB/T 22264.4-2022 Mounted digital display electric measuring instruments—Part 4: Special requirements for frequency meters

Scope

This document specifies the product classification, grading, and compliance of installed digital display frequency meters, technical requirements, information, general logos and symbols, inspection rules, and packaging, storage, and transportation. This document applies to newly manufactured installed digital display frequency meters used to measure frequency in AC distribution systems below 690 V with a nominal frequency of 50 Hz or 60 Hz, as well as to the digital display portion of frequency meters with analog/digital dual displays. This document does not apply to: -- Frequency meters with only direct-acting analog indicators; -- Portable digital display frequency meters; -- Frequency meters for special purposes that are subject to separate national standards (or industry standards).

Development Information

Same series standard

Replace the following standards

Referenced Standards

Related Standards