{
  "schemaVersion": "1.0",
  "id": "https://elect-learn.org/zh/guides/resistor-symbol/",
  "url": "https://elect-learn.org/zh/guides/resistor-symbol/",
  "markdownUrl": "https://elect-learn.org/zh/guides/resistor-symbol/index.md",
  "jsonUrl": "https://elect-learn.org/zh/guides/resistor-symbol/index.json",
  "language": "zh",
  "title": "电阻符号图解：IEC 矩形与美式锯齿形",
  "description": "比较矩形与锯齿形电阻符号，理解位号和阻值标注，并练习在 IEC 风格和美国电子图纸中识别同一器件。",
  "kind": "reference-guide",
  "safetyNotice": "学习参考：不同国家/地区的电气规范、许可和验收主体差异很大，本课程不替代当地法规、持证培训、现场许可或主管部门要求。任何实操前都应断电、验电，并遵守当地 AHJ/监管机构和雇主流程。",
  "sections": [
    {
      "id": "direct-answer",
      "heading": "这个符号是什么意思？",
      "paragraphs": [
        "电阻器常画成矩形或锯齿线。矩形在 IEC 风格图纸中较常见，锯齿形在美国电子图中常见。形状变化不代表它们一定是不同器件。",
        "应把通常以 R 开头的位号与阻值、容差和功率信息一起读取；符号本身不提供这些额定参数。"
      ]
    },
    {
      "id": "symbol-variants",
      "heading": "对比符号变体",
      "cards": [
        {
          "image": "https://elect-learn.org/images/reference/resistor.svg",
          "name": "矩形电阻符号",
          "meaning": "常见 IEC 风格画法。"
        },
        {
          "image": "https://elect-learn.org/images/reference/resistor-zigzag.svg",
          "name": "锯齿形电阻符号",
          "meaning": "常见美国电子图画法。"
        }
      ]
    },
    {
      "id": "read-the-drawing",
      "heading": "如何结合上下文读图",
      "items": [
        "先识别图纸采用的电阻符号形状。",
        "读取 R 位号和阻值，包括 k、M 等前缀及容差说明。",
        "先追踪连接节点，再判断电阻处于串联、并联、分压或其他网络。"
      ],
      "ordered": true
    },
    {
      "id": "common-confusions",
      "heading": "常见混淆与误判",
      "items": [
        "忽略图例和位号时，锯齿线可能被误读为弹簧或加热元件。",
        "图中其他矩形并不自动代表电阻器，必须结合标签与连接。",
        "仅有阻值不能证明功率或耐压等级适用。"
      ]
    },
    {
      "id": "reading-check",
      "heading": "练习：判断符号信息边界",
      "question": "一张原理图用矩形表示 R1，另一张用锯齿形表示 R1。两者一定是不同器件吗？",
      "answer": "不一定。它们可能只是两种电阻制图惯例。应对照 R 位号、阻值、额定参数、物料表和图例，再识别实际器件。"
    },
    {
      "id": "sources-and-next",
      "heading": "标准、来源与相关符号",
      "paragraphs": [
        "这些是独立绘制的教学图，帮助练习读图；实际含义仍由项目图例、适用标准和设备资料决定。 资料核对日期：2026年10月27日。"
      ],
      "links": [
        {
          "title": "IEC 60617 — graphical symbols for diagrams",
          "url": "https://webstore.iec.ch/en/publication/2723"
        },
        {
          "title": "电气图纸符号指南：原理图、单线图、平面图与接线图读法",
          "url": "https://elect-learn.org/zh/guides/electrical-drawing-symbols/"
        },
        {
          "title": "电容器符号图解：有极性与无极性怎么区分",
          "url": "https://elect-learn.org/zh/guides/capacitor-symbol/"
        },
        {
          "title": "开关符号详解：如何识读电气图纸中的开关",
          "url": "https://elect-learn.org/zh/guides/switch-symbol/"
        },
        {
          "title": "内容责任与审校状态",
          "url": "https://elect-learn.org/zh/methodology/"
        }
      ]
    }
  ],
  "dateModified": "2026-10-28",
  "datePublished": "2026-10-28",
  "publisher": {
    "name": "Elect Learn",
    "url": "https://elect-learn.org"
  },
  "review": {
    "status": "not-independently-reviewed",
    "statement": "尚无独立专业审校记录。参考来源不代表来源机构审校或认可本站。",
    "policyUrl": "https://elect-learn.org/zh/methodology/"
  }
}