CDM3-250S/3300塑壳断路器产品介绍（中英双语）
产品概述
CDM3-250S/3300系列塑壳断路器是专为电力配电系统设计的保护与控制装置，额定电流250A，配备200mm方形延伸手动操作机构。产品采用模块化结构设计，适用于交流50/60Hz、额定工作电压至690V的配电网络，可实现对线路及用电设备的过载、短路等异常情况的可靠保护。壳体采用高强度工程塑料注塑成型，具备优良的绝缘性能和机械强度，触头系统配置多重灭弧结构，有效提升电气寿命。
核心特点
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人性化操作机构
配置方形延伸手操杆（操作杆长度200mm），可在配电柜面板外直接进行分合闸操作。旋钮式手柄设计符合人体工学原理，操作力矩小于8N·m，设有明显的分/合闸状态指示标识，便于运维人员直观辨识设备状态。
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智能脱扣特性
配备三极热磁式脱扣单元，瞬时脱扣整定值精准可控，长延时过载保护具备反时限特性。动静触头采用银基合金材料，配合特殊设计的导弧栅片结构，有效缩短电弧持续时间，提升短路分断可靠性。
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紧凑结构设计
采用立体化布局方案，产品宽度仅105mm，深度控制于85mm以内，节省配电柜安装空间。全封闭式防护结构满足IP40防护等级要求，主回路与辅助端子采用分区隔离设计，确保操作安全性。
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便捷扩展功能
标配辅助触点模块插槽，可选配报警触点、分励脱扣等扩展单元。主回路接线端子支持35mm²以下铜导线直连，双孔压接结构确保大电流通路的接触可靠性。
适用范围
本产品适用于工业厂房、商业建筑、基础设施等领域的低压配电系统，可作为主开关或分支开关使用，特别适合需要频繁操作或远程监控的配电场景。配套的延伸操作杆可有效解决高压柜体操作距离受限问题，满足多种安装环境需求。
Technical Specification of CDM3-250S/3300 MCCB with 200mm Extended Handle
Product Profile
The CDM3-250S/3300 molded case circuit breaker is designed for power distribution systems, featuring 250A rated current and 200mm square extended rotary handle. This modular device operates in AC 50/60Hz networks up to 690V, providing reliable protection against overload and short-circuit conditions. The arc-resistant thermoplastic housing integrates multiple arc-quenching chambers, ensuring stable dielectric performance and mechanical durability.
Key Features
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Ergonomic Operation
Equipped with 200mm square extension handle enabling front-panel operation outside switchgear cabinets. The rotary knob requires less than 8N·m operating torque with visible ON/OFF position indicators, allowing clear status identification.
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Precision Protection
Three-pole thermal-magnetic trip unit provides adjustable instantaneous tripping and inverse-time delayed overload protection. Silver-alloy contacts combined with optimized arc chutes ensure consistent breaking performance under fault conditions.
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Space-efficient Design
Compact dimensions (105mm width × 85mm depth) optimize panel space utilization. The fully enclosed IP40-rated housing adopts partitioned terminal layout, isolating power circuits from auxiliary components for enhanced safety.
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Flexible Configuration
Pre-installed auxiliary contact slots support optional alarm contacts or shunt trip modules. Dual-screw terminals accept copper conductors up to 35mm², featuring parallel contact surfaces for improved current-carrying stability.
Application Scenarios
Suitable for LV distribution systems in industrial plants, commercial complexes, and infrastructure projects. Ideal for applications requiring frequent operation or remote monitoring, particularly where cabinet depth restricts direct access. The extended handle facilitates safe operation in confined spaces or high-voltage environments.
Maintenance Guidance
Periodic inspection recommended every 12 months. Check contact wear via built-in mechanical indicator, clean ventilation slots with dry compressed air, and verify terminal tightness using calibrated torque wrench (recommended value: 4.5N·m). Avoid abrasive cleaners that may damage position markings.
（中英文字数总计约620字）
