DZ20Y-400T/3330 400A AC220V塑壳断路器（中英双语介绍）
【中文版】
产品概述：
DZ20Y-400T/3330塑壳断路器是一款专为低压配电系统设计的高性能电气保护装置，采用创新透明壳体结构和集成化排线设计。产品额定电流400A，工作电压AC220V，适用于工业配电、商业建筑及公共设施的电力分配与控制场景。其紧凑型结构在保证功能完整性的同时，兼顾了安装便捷性与运维可视化需求。
核心设计特点：
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透明观察窗口
壳体顶部配置高透光工程材料视窗，可直观查看内部触头状态与分合闸指示，便于快速判断设备运行状态，降低巡检维护难度。
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集成式接线系统
内置优化设计的铜排连接结构，支持多线缆并行接入。模块化插接端子实现快速配线，有效缩短安装工时，尤其适应密集型配电柜的布线需求。
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精准保护机制
配备三段式保护特性（过载长延时、短路短延时及瞬时保护），通过精确的电磁-热双脱扣系统实现对线路的全面防护。动作特性曲线经过严格验证，确保在各类负载条件下稳定运行。
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环境适应能力
壳体采用耐高温、抗冲击复合材料，可耐受-25℃至+70℃工作环境。内部元件经特殊防尘处理，适用于粉尘、潮湿等复杂工况环境。
典型应用场景：
• 制造工厂动力配电柜主开关
• 商业综合体楼层配电箱
• 光伏发电系统直流侧保护
• 轨道交通站场供电系统
使用建议：
建议定期通过透明窗口进行目视检查，及时清除表面浮尘。连接排紧固件推荐每2000操作次或每年进行扭矩校验（具体以实际使用强度为准）。
【English Version】
Product Overview：
The DZ20Y-400T/3330 400A AC220V Molded Case Circuit Breaker is a high-performance electrical protection device specifically engineered for low-voltage distribution systems. Featuring an innovative transparent housing and integrated busbar design, this 400A rated device operates at AC220V, making it suitable for power distribution and control in industrial plants, commercial buildings, and public infrastructure applications. Its compact construction ensures functional integrity while optimizing installation efficiency and operational visibility.
Key Design Features：
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Transparent Inspection Window
The top-mounted viewing window made of high-transparency engineering polymer allows visual confirmation of contact status and switching position indication, significantly simplifying equipment condition monitoring and maintenance procedures.
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Integrated Connection System
Optimized copper busbar structure supports parallel cable termination. Modular plug-in terminals enable rapid wiring, particularly beneficial for high-density panel installations.
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Precision Protection Mechanism
Three-stage protection characteristics (overload long-time delay, short-circuit short-time delay and instantaneous trip) are achieved through a calibrated electro-thermal magnetic tripping system. Verified tripping curves ensure reliable operation across diverse load conditions.
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Environmental Durability
High-impact resistant housing material withstands operating temperatures from -25℃ to +70℃. Internal components with dust-proof treatment maintain performance in challenging environments including dusty or humid locations.
Typical Applications：
• Main switchgear in manufacturing plant power distribution cabinets
• Floor distribution boxes of commercial complexes
• DC side protection in photovoltaic systems
• Power supply systems for rail transit stations
Usage Recommendations：
Regular visual inspection through the transparent window is advised. Busbar fasteners should undergo torque verification every 2,000 operations or annually (subject to actual service conditions).
（中英文合计约620字）
