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University Notes
  • Introduction
  • High Level Math
    • Function, limitation, and continuity
      • What is function?
      • Two kinds of infinity
      • The limitation of a function
      • A model for getting limitation
    • Derivative and differential
      • Formulas of derivative
      • Use derivative formula
      • Goes deeper
      • Use derivative
        • Function analyzing in theory
          • First derivative
          • Second derivative
          • Domain and Extreme Value
          • Overall change
        • Derivative use in reality
    • Integration
      • Indefinite integral
        • Basic formulas
        • Use formula
        • Goes deeper
        • Integration by parts
      • Definite integral
        • Properties of definite integral
        • Second fundamental theorem of calculus
        • Multi-method for solving definite integral
    • Multivariable calculus
      • Limitation
      • Partial derivatives
      • Differential
      • Multiple integral
    • Series
    • Linear algebra
    • GaoKao
      • 1
      • The road for starting
      • Polar Coordinates
      • Tangent Line
  • Electrical Engineering
    • The Terminologys
    • DC
      • The circuit rule
      • KCL and KVL
      • Superposition
    • AC
      • Intuition
      • Resistor
      • Inductor
      • Capacitor
      • AC circuit
      • 三相电
        • 星形联结
        • 三角形联结
        • 实际电路
    • Voltage and Current Rule in Circuit
    • Response
      • Foundations
      • 零输入响应
      • 零状态响应
      • 一阶电路的全响应
  • Analog Electronics
    • Technical terms 1
    • DC stable source circuit 的分析与应用
      • 二极管的特性与应用
        • 半导体
        • PN junction
        • Diode
        • 测试二极管
      • 整流滤波电路的分析与应用
        • Rectifier circuit
      • 直流稳压电路的分析
        • Zener diode
        • Shunt voltage regulators
    • Thyristor
    • Technical terms 2
    • Amplifying circuit
      • Bipolar Junction Transistor
      • Common Emitter Configuration
      • Biasing
      • Analysis
      • Mess
      • Negative-feedback amplifier
      • Integrated Operational Amplifier
    • Algorithms
      • What's the ouput of a voltage rectifier circuit
      • PNP or NPN
      • Judging the state of a BJT
      • What's common in BJT
      • Does a amplifying circuit normal
      • What's the feedback type
      • What kind of distortion you are encounter
  • Digital Electronic Technology
    • Logic Gate
    • Logic expressions
    • Karnaugh map
    • Number system
    • Multiplexer
    • Flip-flop
  • Principles of Communications
    • Overviews
    • PCM
    • HDB3
    • Modulations
    • Cyclic code
  • Data Communications and Networking
    • Something about IPv4
  • Micro Control System 51 Series
    • The Delay function
    • The Interrupt function
  • Maintenance of Railway Optical Cable Lines
    • Questions
    • Pictures
  • Mobile Communications
    • Concepts
    • Coding and Modulation
    • Key Technologies
    • Mobile communication network structure
    • Radio wave Propagation and Interference
    • GSM
    • CDMA
    • GPRS
    • 3G
    • 4G
    • Base Station Maintenance
  • Multimedia Communication
    • Concept of Multimedia
    • Compression
    • Lossless Compression
    • Audio
    • Lossy Audio Coding
    • Graph Compression
    • All for the exam
  • Power system for Communication Devices
    • Overview
    • AC power Distribution Panel
    • UPS
    • HF Switched-mode Power Supply
    • Battery
    • Earthing or Use Lightning Arrester
    • Power Supply Monitoring System
    • All for the exam
  • Optical fiber Communication system
    • What is Optical fiber Communication system
      • Prepare
      • Something About Optical fiber
      • Passive Optical Devices
      • Active Optical Devices
      • Optical transmitter Test
      • Optical receiver Test
      • Compose an Optical Communication System
    • SDH (Synchronous Digital Hierarchy)
      • Frame Structure of SDH
      • SDH Equipments
      • Clock System
      • ZXONM E300 Practice
      • SDH protection
    • WDM (Wavelength-Division Multiplexing)
    • OTN (Optical Transport Network)
      • OverHead of OTN
      • OTN Alarms & Errors
      • Do it again, what's happened?
  • Communication Tech English
    • Fundamentals of Electricity
    • Digital Communications
    • Optical Communications
  • High-speed railway Communication Technology
    • Overview
    • Base Knowledge
    • FH98
    • MDS3400
    • Everything is for the exam
  • GSM for Railway
    • Overview
    • Wired Parts
    • Digital dispatch Communication System
    • Basic Knowledge of GSM-R
    • Key technologies for GSM-R
    • Structure of GSM-R
    • GSM-R Network Mode
    • Wireless Channels for GSM-R
    • Mobility Management
    • Connection Management
    • Security Management
    • GPRS
    • GSM-R/GPRS Wireless Access Platform
    • GSM-R Features
    • GSM-R Numbering Plan
    • ASCI
  • Network Configuration Training
    • Words I have learned
  • Broadband Access Technology
    • Using Copper Line
    • Using Optical Fiber
    • Wireless
    • All for the test
  • CIR
    • Basci Knowledge
    • Testing Equipment
    • The Structure of CIR
    • All for the exam
  • LTE
  • Script for ChaoXing
  • Transmission and access network
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  • 作用
  • 性能
  • 交、直流母线颜色
  • 主要电器及电气符号
  • 1. 刀开关(Q 或 QS)
  • 2. 按钮(SB)
  • 3. 熔断器(保险丝)(F 或 FU)
  • 4. 低压断路器(自动空气开关)(QF)
  • 5. 交流接触器(KM)
  • 6. 继电器(K)
  • 7. 电流互感器
  • 8. 电压互感器
  • 9. 避雷器(电压限制器)(S)
  • 实际电路工作原理

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  1. Power system for Communication Devices

AC power Distribution Panel

PreviousOverviewNextUPS

Last updated 5 years ago

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作用

对市电进行通断、切换控制、监测

性能

  1. 输入电源转换: 要求输入两路交流电源

  2. 遥信(远程发送信号); 遥测(远程测量)

  3. 提供各种容量的负载输出分路

  4. 接地壳电阻<=0.1Ω接地壳电阻 <= 0.1 \Omega接地壳电阻<=0.1Ω

交、直流母线颜色

交流三相:

  • A相: 黄色

  • B相: 绿色

  • C相: 红色

  • 零线或中性线: 淡蓝色

  • 接地线: 黄和绿双色

直流:

  • 正级: 棕(红)

  • 负极: 蓝

  • 接地: 淡蓝色

主要电器及电气符号

1. 刀开关(Q 或 QS)

作用: 隔离电源,不频繁通断

2. 按钮(SB)

作用: 接通或断开电路

停止: 红色

起动: 绿色

点动: 黑色

3. 熔断器(保险丝)(F 或 FU)

作用: 防短路或严重过载

4. 低压断路器(自动空气开关)(QF)

作用: 自动进行失压、欠压、过载、和短路保护

5. 交流接触器(KM)

作用: 用于频繁接通和断开大电流电路; 具有欠压、失压保护; 可遥控

6. 继电器(K)

作用: 类似交流接触器,但只用于小电流

7. 电流互感器

作用: 将大电流变成小电流

不允许开路

8. 电压互感器

作用: 将大电压变成小电压

不允许短路

9. 避雷器(电压限制器)(S)

  • 并联于电路 (在并联电路,分支电压相同,避雷器被雷击电压迅速减小)

实际电路工作原理

左上角: 监控两个市电,哪个更稳定就切换到哪一个

左下角: 具体的切换电路

右边: 负载(各种用电设备)

下边: 防雷器