塑殼漏電保護斷路器DZ20L-250T/4300B 250A 75MA 透明 延時0.2S
產(chǎn)品概述
DZ20L-250T/4300B塑殼漏電保護斷路器是一款采用透明外殼設計的智能配電保護裝置，適用于交流380V/50Hz低壓配電系統(tǒng)。該產(chǎn)品額定電流250A，漏電動作電流75mA，具有0.2秒延時保護功能，能有效防止人身觸電及電氣火災風險。透明殼體設計使內(nèi)部觸點狀態(tài)一目了然，便于快速排查故障。產(chǎn)品采用熱磁式脫扣機構，集成過載、短路、漏電多重保護功能，適用于工業(yè)配電、商業(yè)建筑等對安全要求較高的場所。69
核心功能特點
本產(chǎn)品具備精確的漏電保護功能，75mA動作電流配合0.2秒延時特性，既能可靠識別危險漏電信號，又可避免因瞬時電流波動導致的誤動作。透明PC材料外殼不僅提高了產(chǎn)品美觀度，更便于觀察內(nèi)部觸點分斷狀態(tài)和滅弧室工作狀況。斷路器采用板前接線方式，安裝維護便捷，分斷能力達15kA，可快速切斷故障電流。延時保護功能特別適用于存在電動機啟動等瞬態(tài)電流的場合，確保供電連續(xù)性。產(chǎn)品工作溫度范圍-5℃至+40℃，適應多種環(huán)境條件。622
技術參數(shù)說明
該斷路器殼架電流250A，額定工作電壓AC400V，極數(shù)4P（含N極），N極與其他三極同步分合。漏電保護特性為延時型，動作時間≤0.2秒，漏電動作電流值75mA±20%。機械壽命達7000次以上，電氣壽命1000次以上。產(chǎn)品采用固定式安裝，防護等級IP20，符合常規(guī)配電柜安裝要求。接線端子采用防指觸設計，提高操作安全性。產(chǎn)品適用于TT/TN-S等接地系統(tǒng)，能有效監(jiān)測線路絕緣狀況。614
應用場景
DZ20L-250T/4300B主要應用于電動機控制中心、生產(chǎn)線配電箱、數(shù)據(jù)中心等需要高可靠性保護的場合。在商業(yè)建筑中可用于主配電柜分支回路保護，防范電氣火災風險。產(chǎn)品透明設計便于日常巡檢，特別適合對安全可視化要求高的場所。其延時特性使其能兼容變頻器、軟啟動器等易產(chǎn)生諧波設備的配電系統(tǒng)，避免保護裝置誤動作。618
Product Overview
The DZ20L-250T/4300B molded case leakage protection circuit breaker features a transparent housing design for visual inspection of internal contacts. With 250A rated current and 75mA earth leakage sensitivity, it provides 0.2-second delayed protection suitable for 380V/50Hz low-voltage distribution systems. The product combines overload, short-circuit and leakage protection functions in one unit, making it ideal for industrial plants and commercial buildings where electrical safety is critical. The see-through polycarbonate housing allows quick status checks without disassembly. 69
Key Features
This breaker offers precise earth fault protection with adjustable 75mA trip threshold and 0.2-second time delay, effectively preventing nuisance tripping during motor starts. The 15kA breaking capacity ensures reliable fault current interruption. Front-mounted terminals simplify installation while touch-proof design enhances operational safety. The delay function maintains power continuity during temporary current fluctuations. Operating temperature ranges from -5°C to 40°C with 90% relative humidity tolerance at 20°C. 622
Technical Specifications
The unit s frame size is 250A with 4-pole configuration (including N pole). Rated operational voltage reaches AC400V with thermal-magnetic tripping mechanism. Earth leakage protection features ≤0.2s delayed operation at 75mA±20% threshold. Mechanical endurance exceeds 7,000 operations while electrical life maintains 1,000 trips at rated current. Fixed mounting type with IP20 protection grade suits standard panel installation. Compatible with TT/TN-S earthing systems for comprehensive insulation monitoring. 614
Typical Applications
Widely used in motor control centers, production line distribution cabinets and data center power systems requiring high reliability. Suitable as branch circuit protection in commercial building main panels to prevent electrical fires. The transparent design benefits facilities prioritizing visual maintenance checks. Time-delay characteristics make it compatible with variable frequency drives and soft starters that generate harmonic currents. 618
塑殼漏電保護斷路器DZ20L-250T/4300B 250A 75MA 透明 延時0.2S
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