标准摘要
[中文适用范围]： 仅适用于新制造的准确度等级为 1 级和 2 级的静态电度表，用于测量 50 Hz 或 60 Hz 网络中的交流有功电能，并且仅适用于其型式试验。它仅适用于静态瓦特 [外文原描述]： Applies only to newly manufactured static watt-hour meters of accuracy classes 1 and 2, for the measurement of alternating current electrical active energy in 50 Hz or 60 Hz networks and it applies to their type tests only. It applies only to static watt-hour meters for indoor and outdoor application consisting of a measuring element and register(s) enclosed together in a meter case. This publication is of high relevance for Smart Grid .
英文名称Electricity metering equipment (a.c.) - Particular requirements - Part 21: Static meters for active energy (classes 1 and 2)