IEC 62053-23:20 20仅适用于用于测量50 Hz或60 Hz网络中交流无功功率的2级和3级静态可变小时计，并且仅适用于其型式试验。 出于实际原因，本文件基于仅包含基频的正弦电流和电压的无功能量的常规定义。 本文件适用于设计用于: ？测量和控制电压高达1 000 V AC的电网（市电）上的电能； ？除指示显示器外，所有功能元件（包括附加模块）都封装在或形成单个仪表外壳中； ？在集成或分离式指示显示器的情况下操作，或在没有指示显示器的情况下操作；？安装在指定的配套插座或机架中； ？可选地，提供除电能测量之外的附加功能。 设计用于与低功率互感器（IEC 61869系列中定义的LPIT）一起运行的仪表，只有当此类仪表及其LPIT一起测试并满足直接连接仪表的要求时，才可视为符合本文件。 本文件不适用于: ？从标称电压得出的线到中性线的电压超过1 000 V AC的仪表； ？在没有低功率仪表变压器（IEC 61869系列中定义的LPIT）的情况下进行测试时，预期与低功率仪表变压器连接的仪表； ？包括物理上彼此远离的多个设备(LPIT除外)的计量系统；？便携式仪表； ？机车车辆、车辆、船舶和飞机上使用的仪表； ？实验室和仪表测试设备； ？参考标准仪表； ？到仪表的寄存器的数据接口； ？用于安装用电计量设备的配套插座或机架； ？电能表中提供的任何附加功能。 本文件不包括检测和预防损害仪表性能的欺诈企图（篡改）的措施。 本第二版取消并取代2003年出版的第一版及其修正案1:20 16。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)取消了所有仪表安全要求；IEC 62052-31:2015. b)用In代替Ib；引用直连仪表时不再使用Ib。 c)将所有一般要求和试验方法的描述从IEC 62053-21:20 03、IEC 62053-22:20 03、IEC 62053-23:20 03、IEC 62053-24:20 03移至IEC 62052-11:20 20；IEC 62053-21:20 20、IEC 62053-22:20 20、IEC 62053-23:20 20、IEC 62053-24:20 20仅包含准确度等级特定要求。 d)增加了有关以下方面的新要求和测试: 1）测量不确定度和重复性（7.3、7.8）； 2）快速负载电流变化的影响（9.4.12）； 3）对2 kHz至150 kHz频率范围内传导差分电流干扰的抗扰度（9.3.8）。 e)设计用于与低功率互感器(LPIT)一起运行的仪表可以作为直接连接的仪表进行测试，以符合本文件的要求。IEC 62053-23中定义的无功功率精度等级2和3也已添加到IEC 62053-24中。TC13 WG11认为，IEC 62053-24中描述的测试方法是测试现代无功电能表的更好方法。因此，IEC 62053-23将在不久的将来被撤回，并且不应用于新的仪表设计。

IEC 62053-23:2020 applies only to static var-hour meters of accuracy classes 2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
For practical reasons, this document is based on a conventional definition of reactive energy for sinusoidal currents and voltages containing the fundamental frequency only.
This document applies to electricity metering equipment designed to:
？ measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
？ have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
？ operate with integrated or detached indicating displays, or without an indicating display;
？ be installed in a specified matching socket or rack;
？ optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the IEC 61869 series) may be considered as compliant with this document only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
？ meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
？ meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
？ metering systems comprising multiple devices (except LPITs) physically remote from one another;
？ portable meters;
？ meters used in rolling stock, vehicles, ships and airplanes;
？ laboratory and meter test equipment;
？ reference standard meters;
？ data interfaces to the register of the meter;
？ matching sockets or racks used for installation of electricity metering equipment;
？ any additional functions provided in electrical energy meters.
This document does not cover measures for the detection and prevention of fraudulent attempts to compromise a meter’s performance (tampering).
This second edition cancels and replaces the first edition published in 2003 and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31:2015.
b) Replaced Ib with In; Ib is no longer used when referencing directly connected meters.
c) Moved the descriptions of all general requirements and test methods from IEC 62053-21: 2003, IEC 62053-22: 2003, IEC 62053-23: 2003, IEC 62053-24: 2003 to IEC 62052-11:2020; IEC 62053-21:2020, IEC 62053-22:2020, IEC 62053-23:2020, IEC 62053-24:2020 contain only accuracy class specific requirements.
d) Added new requirements and tests concerning:
1) measurement uncertainty and repeatability (7.3, 7.8);
2) influence of fast load current variations (9.4.12);
3) immunity to conducted differential current disturbances in the 2 kHz to 150 kHz frequency range (9.3.8).
e) Meters designed for operation with low power instrument transformers (LPITs) may be tested for compliance with this document as directly connected meters.
The reactive energy accuracy classes 2 and 3 defined in IEC 62053-23 have also been added to IEC 62053-24. The TC13 WG11 is of the opinion that the testing methodology described in IEC 62053-24 is a better approach to testing of modern reactive energy meters. Consequently, IEC 62053-23 will be withdrawn in the near future, and should not be used for new meter designs.