产品名称：塑壳漏电断路器
Product Name: Molded Case Leakage Circuit Breaker
型号：DZ20L-250/4300（250A 500mA 不带铜鼻）
Model: DZ20L-250/4300 (250A 500mA Without Copper Terminal)
核心功能与特点 Core Functions & Features
本产品是专为低压配电系统设计的智能保护装置，可精准检测线路中的漏电故障，当泄漏电流达到设定阈值时，能在0.1秒内自动切断电路。采用模块化触点结构设计，配备独立脱扣机构，在实现漏电保护的同时兼具过载和短路防护功能。产品外壳采用高强度工程塑料，具有耐高温、抗冲击特性，触头系统应用银合金材料，有效降低接触电阻，延长电气寿命。
This intelligent protection device is specifically designed for low-voltage distribution systems. It accurately detects leakage faults in circuits and automatically disconnects within 0.1 seconds when leakage current reaches the preset threshold. Featuring a modular contact structure with independent trip mechanism, it provides comprehensive protection against leakage, overload and short circuit. The high-strength engineering plastic housing demonstrates excellent heat resistance and impact tolerance, while the silver alloy contact system effectively reduces contact resistance and extends electrical durability.
技术优势 Technical Advantages
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双断点灭弧系统提升分断能力
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透明防护罩设计便于状态观察
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可调式安装导轨适配标准配电柜
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机械联锁装置防止误操作
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500mA高灵敏度漏电保护
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250A额定电流满足大负载需求
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Double-break arc extinguishing system enhances breaking capacity
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Transparent protective cover enables visual status monitoring
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Adjustable mounting rail compatible with standard cabinets
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Mechanical interlock prevents misoperation
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500mA high-sensitivity leakage protection
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250A rated current for high-load applications
应用领域 Application Areas
适用于三相四线制中性点接地系统，广泛用于：
- 工业厂房动力配电柜
- 商业建筑主配电系统
- 户外箱式变电站
- 大型机械设备供电网络
- 市政工程电力分配节点
Designed for three-phase four-wire neutral grounding systems, widely used in:
- Industrial plant power distribution cabinets
- Commercial building main distribution systems
- Outdoor box-type substations
- Large machinery power supply networks
- Municipal power distribution nodes
技术参数 Technical Parameters
| 项目 Item |
参数 Specification |
| 极数 Poles |
3P+N |
| 额定电压 Voltage |
AC 400V |
| 额定电流 Current |
250A |
| 漏电动作值 |
500mA±10% |
| 机械寿命 |
10,000次 |
| 接线方式 |
母排直连 |
使用提示 Usage Notes
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安装前需确认线路电压等级匹配
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建议每季度进行功能测试
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连接导线截面需≥70mm²
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工作环境湿度应＜90%RH
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海拔高度不超过2000米
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存储温度范围-25℃~+70℃
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Verify voltage compatibility before installation
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Recommend quarterly functional testing
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Conductor cross-section ≥70mm²
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Operating humidity ＜90%RH
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Altitude ≤2000 meters
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Storage temperature -25℃~+70℃
本产品通过优化电磁脱扣机构和改进绝缘材料配方，提升了在复杂工况下的可靠性。分体式结构设计便于维护检修，旋转手柄提供清晰的合/分闸指示，宽幅温度适应性确保在-5℃至+40℃环境稳定工作。适用于对供电连续性要求较高的场合，为电力系统提供多维度安全防护。
Through optimized electromagnetic trip mechanism and improved insulation material formula, this product enhances reliability under complex working conditions. The split structure facilitates maintenance, while the rotary handle provides clear ON/OFF indication. Wide temperature adaptability ensures stable operation from -5℃ to +40℃, making it ideal for applications requiring high power supply continuity and multi-dimensional protection.
