產品名稱：塑殼漏電斷路器
Product Name: Molded Case Leakage Circuit Breaker
型號：DZ20L-250/4300（250A 500mA 不帶銅鼻）
Model: DZ20L-250/4300 (250A 500mA Without Copper Terminal)
核心功能與特點 Core Functions & Features
本產品是專為低壓配電系統設計的智能保護裝置，可精準檢測線路中的漏電故障，當泄漏電流達到設定閾值時，能在0.1秒內自動切斷電路。采用模塊化觸點結構設計，配備獨立脫扣機構，在實現漏電保護的同時兼具過載和短路防護功能。產品外殼采用高強度工程塑料，具有耐高溫、抗沖擊特性，觸頭系統應用銀合金材料，有效降低接觸電阻，延長電氣壽命。
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.
技術優勢 Technical Advantages
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雙斷點滅弧系統提升分斷能力
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透明防護罩設計便于狀態觀察
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可調式安裝導軌適配標準配電柜
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機械聯鎖裝置防止誤操作
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500mA高靈敏度漏電保護
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250A額定電流滿足大負載需求
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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
應用領域 Application Areas
適用于三相四線制中性點接地系統，廣泛用于：
- 工業廠房動力配電柜
- 商業建筑主配電系統
- 戶外箱式變電站
- 大型機械設備供電網絡
- 市政工程電力分配節點
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
技術參數 Technical Parameters
| 項目 Item |
參數 Specification |
| 極數 Poles |
3P+N |
| 額定電壓 Voltage |
AC 400V |
| 額定電流 Current |
250A |
| 漏電動作值 |
500mA±10% |
| 機械壽命 |
10,000次 |
| 接線方式 |
母排直連 |
使用提示 Usage Notes
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安裝前需確認線路電壓等級匹配
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建議每季度進行功能測試
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連接導線截面需≥70mm²
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工作環境濕度應＜90%RH
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海拔高度不超過2000米
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存儲溫度范圍-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℃
本產品通過優化電磁脫扣機構和改進絕緣材料配方，提升了在復雜工況下的可靠性。分體式結構設計便于維護檢修，旋轉手柄提供清晰的合/分閘指示，寬幅溫度適應性確保在-5℃至+40℃環境穩定工作。適用于對供電連續性要求較高的場合，為電力系統提供多維度安全防護。
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.
