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IEC 62052-11是一项国际标准，主要涉及电能计量装置的测量和限制技术要求，旨在确保电能计量装置的准确性和性能稳定性
资源介绍:
IEC 62052-11是一项国际标准，主要涉及电能计量装置的测量和限制技术要求，旨在确保电能计量装置的准确性和性能稳定性。该标准要求电能计量装置必须满足一系列的技术指标，包括测量精度、输出信号、温度范围、电磁兼容性和安全性等方面。 IEC 62052-11标准规定了电能计量装置的测量原理和计算方法，并阐明了电能测量的特性和基本法则，尤其是在规定电能计量装置的总体要求、测量范围、测量误差、输出信号等方面，提供了详细的技术规范和检验方法。 IEC 62052-11标准对于保障电能计量的准确性、时效性和公正性具有重要意义，对于电能供应企业、电能计量装置生产厂家以及检定、校准等相关机构具有指导和参考价值。通过IEC 62052-11标准的执行，可以有效地增强电力供应系统的安全和可靠性，维护电能供应市场的公平和健康，提高用户对电能计量装置的信任度和满意度。
IEC 62052-11
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
IEC 62052-11:2020-06(en)
®
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IEC 62052-11
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20
ISBN 978-2-8322-8437-7
® Registered trademark of the International Electrotechnical Commission
®
Warning! Make sure that you obtained this publication from an authorized distributor.
– 2 – IEC 62052-11:2020 © IEC 2020
CONTENTS
FOREWORD ........................................................................................................................... 8
INTRODUCTION ................................................................................................................... 10
1 Scope ............................................................................................................................ 13
2 Normative references .................................................................................................... 14
3 Terms and definitions .................................................................................................... 17
3.1 General definitions ................................................................................................ 17
3.2 Definitions related to the functional elements ........................................................ 21
3.3 Definitions of meter ports ...................................................................................... 24
3.4 Definitions of mechanical elements ....................................................................... 25
3.5 Definitions related to measurements ..................................................................... 27
3.6 Definitions related to external influences ............................................................... 30
3.7 Definition of tests .................................................................................................. 33
3.8 Definitions related to electromechanical meters .................................................... 33
3.9 Definitions related to meter marking and symbols ................................................. 34
4 Nominal electrical values ............................................................................................... 35
4.1 Voltages ............................................................................................................... 35
4.1.1 Nominal voltages ........................................................................................... 35
4.1.2 Voltage ranges .............................................................................................. 36
4.2 Currents ................................................................................................................ 36
4.2.1 Nominal currents ........................................................................................... 36
4.2.2 Starting current .............................................................................................. 36
4.2.3 Minimum current ............................................................................................ 36
4.2.4 Maximum current ........................................................................................... 37
4.2.5 Current ranges .............................................................................................. 37
4.3 Frequencies .......................................................................................................... 37
4.3.1 Nominal frequencies ...................................................................................... 37
4.3.2 Frequency ranges .......................................................................................... 37
4.4 Power consumption ............................................................................................... 37
5 Construction requirements ............................................................................................. 39
5.1 General ................................................................................................................. 39
5.2 Mechanical tests ................................................................................................... 39
5.2.1 Shock test ..................................................................................................... 39
5.2.2 Vibration test ................................................................................................. 40
5.3 Window ................................................................................................................. 40
5.4 Terminals – Terminal block(s) – Protective conductor terminal .............................. 40
5.5 Sealing provisions ................................................................................................. 40
5.5.1 General ......................................................................................................... 40
5.5.2 Meter case .................................................................................................... 40
5.5.3 Meter terminals .............................................................................................. 41
5.5.4 Sealing of detached indicating displays ......................................................... 41
5.5.5 Sealing of LPIT connections .......................................................................... 41
5.5.6 Sealing of meter configuration ....................................................................... 42
5.6 Display of measured values .................................................................................. 42
5.6.1 General ......................................................................................................... 42
5.6.2 Meters without indicating displays.................................................................. 42
5.6.3 Meters with indicating displays ...................................................................... 42
IEC 62052-11:2020 © IEC 2020 – 3 –
5.7
Storage of measured values ................................................................................. 43
5.8 Pulse outputs ........................................................................................................ 43
5.8.1 General ......................................................................................................... 43
5.8.2 Optical test output ......................................................................................... 43
5.8.3 Electrical pulse output ................................................................................... 45
5.8.4 Operation indicator ........................................................................................ 45
5.9 Electrical pulse inputs ........................................................................................... 46
5.9.1 General characteristics .................................................................................. 46
5.9.2 Functional tests of electrical pulse inputs ....................................................... 46
5.10 Auxiliary power supply .......................................................................................... 46
6 Meter marking and documentation ................................................................................. 47
6.1 Meter accuracy class marking ............................................................................... 47
6.2 Meter marking ....................................................................................................... 47
6.3 Connection diagrams and terminal marking ........................................................... 51
6.4 Symbols ................................................................................................................ 51
6.4.1 General ......................................................................................................... 51
6.4.2 Symbols for the measuring elements ............................................................. 52
6.4.3 Symbols for transformer-operated meters ...................................................... 52
6.4.4 Identification of the displayed information ...................................................... 52
6.4.5 Marking of the measured quantity .................................................................. 53
6.4.6 Symbols of principal units used for meters (see Table 8) ............................... 53
6.4.7 Symbols for auxiliary devices ......................................................................... 54
6.4.8 Symbols for details of the suspension of the moving element ......................... 54
6.4.9 Symbols for communication ports .................................................................. 54
6.5 Documentation ...................................................................................................... 54
6.5.1 Installation manuals ....................................................................................... 54
6.5.2 Instruction for use .......................................................................................... 54
7 Metrological performance requirements and tests .......................................................... 54
7.1 General test conditions ......................................................................................... 54
7.2 Methods of accuracy verification ........................................................................... 56
7.3 Measurement uncertainty ...................................................................................... 56
7.4 Meter constant ...................................................................................................... 57
7.5 Initial start-up of the meter .................................................................................... 57
7.6 Test of no-load condition ....................................................................................... 58
7.7 Starting current test .............................................................................................. 58
7.8 Repeatability test .................................................................................................. 59
7.9 Limits of error due to variation of the current ......................................................... 59
7.10 Limits of error due to influence quantities .............................................................. 60
7.11 Time-keeping accuracy ......................................................................................... 60
8 Climatic requirements .................................................................................................... 60
8.1 General ................................................................................................................. 60
8.2 Environmental conditions ...................................................................................... 60
8.3 Tests of the effects of the climatic environments ................................................... 60
8.3.1 General test requirements ............................................................................. 60
8.3.2 Acceptance criteria ........................................................................................ 61
8.3.3 Dry heat test .................................................................................................. 61
8.3.4 Cold test ........................................................................................................ 61
8.3.5 Damp heat cyclic test .................................................................................... 61
8.3.6 Protection against solar radiation ................................................................... 62
资源文件列表:
行业标准IEC-62052-11-2020.zip 大约有1个文件
行业标准IEC-62052-11-2020.pdf 3.35MB
这是一次从零开始，直至成为大数据领域大神的旅程。本课程共65章，合计856课时，覆盖了从Java基础语法到大数据技术栈的全方位知识，包括代码、课件、软件和资料，确保学员能够全面而深入地掌握大数据技术。
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Java基础与进阶
Java基础语法
选择结构与循环结构
数组、类、对象和方法
项目实战：人机猜拳和DVD管理系统
面向对象编程
继承、封装和多态
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Java高级特性
异常处理、日期类、集合框架
Java IO流技术与XML操作
MySQL数据库基础与进阶
Java Web基础
JDBC数据库操作
多线程编程基础与高级特性
网络编程与反射、序列化
大数据技术栈
Hadoop生态
1004551543418023建模代码.zip
做课设的时候整理的，包含0-9、+-*/、xyz等在内的24种数学元素，一共有13000左右张图片，已按训练集和测试集划分好，需要的可自取~
【内容概要】本资料是Java软件开发基础的期末大作业。适用于以JavaFX为主体的小游戏开发程序练习。开发过程使用IDEA。
【详细内容】本项目设计了多个页面，实现了
a)登录游戏
b)界面友好，需包括操作规则提示，当前得分，最高分等基本信息
c)当用户操作违反规则时应给用户发出消息提示
d)能够实现简单的双人对战，不要求实现人机对战
e)使用reset操作重新开始一轮游戏
f)使用鼠标操作游戏界面
g)将所有玩过本游戏的用户的信息保存在文件中，能够使用排行榜功能显示用户排名及分数
h)记录当前棋局棋谱
等功能。
【使用说明】由于文件中使用了绝对路径，建议将项目放置于E盘的Java文件夹中再运行程序。由于开发者时间问题，这方面并没有进行修改，请使用者注意该情况！！！在项目中，使用本地文件保存用户数据，因此在运行时请保证两个用来存储用户信息的文本文件：UserInformation.txt、rankList.txt中不存在额外的空行，即鼠标停留在最后一行末尾处，否则程序运行有误。
【附】由于这是开发者学习完成的项目，如有问题，请及时与开发者联系。同时也希望同学们不要直接套用程序。
https://github.com/nobody-famous/alive-lsp
采用git archive生成，时间2024-07-18 17:30
是一个功能丰富的媒体播放库，旨在跨平台提供高性能、灵活的视频和音频播放能力。其源代码包含了播放器核心功能的实现，如解码、渲染、缓冲控制、格式支持扩展等，以及可能包括的UI组件（如播放控制界面）的基础框架。
通过访问这些源代码，开发者可以学习如何构建一个高效且可扩展的媒体播放系统，了解媒体处理中的关键技术挑战及其解决方案。此外，源代码还提供了修改和扩展功能的机会，以满足特定项目或产品的需求，比如添加新的媒体格式支持、优化播放性能、调整UI界面等。
对于希望在现有视频播放器基础上进行定制或从头开始构建自己媒体播放解决方案的开发者来说，#的源代码是一个宝贵的资源，能够加速开发过程，提供坚实的技术基础和灵感来源。
项目名称：崩坏3前端界面仿制项目
技术栈：HTML5, CSS3 (包括Sass/Less等预处理器), JavaScript (可能使用Vue.js、React等现代前端框架简化开发)
目标：创建一个静态的、视觉上接近《崩坏3》游戏登录界面、主界面或角色选择界面的网页。
资源与工具
HTML：用于构建页面的基本结构，包括导航栏、背景图、角色展示区、按钮等。
CSS：使用CSS进行样式设计，包括但不限于背景渐变、阴影效果、动画效果、字体样式等，以模拟《崩坏3》的UI风格。推荐使用Sass或Less等CSS预处理器以提高开发效率。
JavaScript（可选）：用于添加一些简单的交互效果，如按钮点击响应、轮播图等。
图片与资源：从官方渠道或合法途径获取《崩坏3》的相关图片资源（如角色立绘、UI元素等），或使用相似风格的图片进行替代。
开发步骤
需求分析与设计：首先分析《崩坏3》的UI特点，确定要仿制的具体界面。使用设计工具绘制草图，确定布局和样式。
HTML结构搭建：根据设计稿，使用HTML构建页面的基本结构。
CSS样式编写：使用CSS对页面进行样式设计，实现与《崩坏3》相似
华为HCIE-datacom实验考试拓扑设计涵盖了四个主要板块，分别为X园区-传统园区网、Y园区-云管理园区SDN、Z园区-骨干网以及Python-自动化运维。这些板块涵盖了网络通信领域的关键方面，旨在考核考生对数据通信、网络管理以及自动化运维等核心技能的掌握程度。
在X园区-传统园区网板块中，考生将会面对传统网络架构下的场景模拟，需要展现在传统网络环境中搭建、管理和故障排除的能力。这部分内容主要考察考生对传统网络架构的理解和操作技能。
Y园区-云管理园区SDN板块着重于云计算和软件定义网络（SDN）的结合，考察考生在云环境下网络管理、资源调度及虚拟化等方面的实践经验。这一板块体现了当前网络技术发展的趋势，考生需要展现出对新型网络架构的理解和应用能力。
Z园区-骨干网板块将对考生的网络规划和优化能力进行考核，重点考察骨干网的设计与实施。在这一板块中，考生需要展现出对大规模网络架构的规划和部署能力，以确保网络的高可用性和高性能。
最后，Python-自动化运维板块则关注考生的自动化运维技能，考察其在网络运维过程中应用Python编程实现自动化任务的能力。这一板块旨在培养考生具备利
