DZ20L-250/4300B塑壳漏电保护断路器产品介绍
【产品概述】
DZ20L-250/4300B塑壳漏电保护断路器是针对工业配电系统研发的专业保护装置，额定工作电流250A，集成线路过载、短路保护及漏电监测功能于一体。产品采用模块化结构设计，具备可调式漏电动作电流设定（100mA/300mA/500mA）与0.3秒延时动作特性，有效平衡供电连续性与保护灵敏度的需求。外壳采用高强度工程塑料制造，防护等级达到IP40，适用于各类电气环境。
【核心功能】
- 智能漏电保护：通过电磁式电流互感器实时监测漏电信号，当线路漏电值达到设定阈值时，执行机构可在0.3秒内完成分断动作，降低人身触电风险。
- 多级保护协同：整合热磁脱扣机构实现过载长延时保护与短路瞬时保护双重机制，额定分断能力达35kA，可有效抑制电气火灾隐患。
- 参数可视化调节：旋转式电流整定旋钮配合刻度指示窗，便于工程人员根据现场需求精确调整保护参数。
【应用场景】
适用于400V及以下低压配电系统，典型应用包括：
- 工业厂房动力配电柜主开关
- 商业建筑楼层分配电箱
- 户外箱式变电站出线保护
- 大型机械设备电源控制
- 临时施工用电系统保护
【设计特点】
• 机构优化：双断点触头结构配合高效灭弧系统，提升分断速度与电气寿命
• 状态可视：机械式分合指示器与漏电动作指示窗口，实现运行状态直观监测
• 安装便捷：标准化35mm导轨安装设计，支持垂直/水平多方位固定方式
• 维护简便：可拆卸式端子罩设计，方便接线检查与部件更换
DZ20L-250/4300B Molded Case Leakage Circuit Breaker Product Introduction
[Product Overview]
The DZ20L-250/4300B molded case leakage circuit breaker is a professional protection device developed for industrial power distribution systems. With a rated operational current of 250A, it integrates line overload protection, short-circuit protection, and leakage monitoring functions. Featuring modular design, the product offers adjustable leakage operating current settings (100mA/300mA/500mA) and 0.3-second delayed operation characteristics, effectively balancing power supply continuity with protection sensitivity. The housing utilizes high-strength engineering plastics, achieving IP40 protection level for various electrical environments.
[Core Functions]
- Intelligent Leakage Protection: Employs electromagnetic current transformers for real-time leakage monitoring. When leakage reaches preset thresholds, the actuator completes breaking within 0.3 seconds to reduce electric shock risks.
- Multi-level Protection Coordination: Combines thermal-magnetic trip mechanism for overload time-delay protection and short-circuit instantaneous protection, with rated breaking capacity up to 35kA, effectively suppressing electrical fire hazards.
- Visual Parameter Adjustment: Rotary current setting knob with scale indicator window enables precise protection parameter adjustments according to field requirements.
[Application Scenarios]
Suitable for 400V and below low-voltage distribution systems, including:
- Main switches for industrial plant power distribution cabinets
- Commercial building floor distribution boxes
- Outdoor substation outlet protection
- Power control for large mechanical equipment
- Temporary construction power system protection
[Design Features]
• Mechanism Optimization: Double-break contact structure with efficient arc-extinguishing system enhances breaking speed and electrical endurance
• Visual Status Indication: Mechanical ON/OFF indicator and leakage action window enable intuitive operation monitoring
• Easy Installation: Standard 35mm rail mounting compatible with vertical/horizontal fixation
• Maintenance Friendly: Detachable terminal cover facilitates wiring inspection and component replacement
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