المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
Chint NXMLE-100S/4300A-100A is a molded case قاطع الدائرة الحالية المتبقية (RCB), تستخدم بشكل رئيسي للحماية من التحميل الزائد, حماية ماس كهربائى, residual current protection, and infrequent line switching in low-voltage power distribution systems.
أنا. Model Meaning and Core Parameters
1. تفسير النموذج
NXMLE: Chint’s series designation for molded case residual current circuit breakers.
125س: Frame current of 125A, breaking capacity of 25kA (الفئة س).
4300أ: Four-pole structure (3ف + ن). The N pole is not equipped with an overcurrent release, remains permanently connected, and switches on/off synchronously with the other three poles.
100أ: Rated current of 100A, suitable for a load power of approximately 44kW (تيار متردد 400 فولت).
2. المعلمات الأساسية
الحماية الحالية المتبقية: Two selectable ranges are available: 30-50-100أماه (for residential/commercial scenarios) or 100-200-300-500mA (for industrial scenarios), with an operating time of ≤0.1 seconds.
كسر القدرة: Ultimate short-circuit breaking capacity of 25kA, suitable for power distribution systems with low short-circuit current.
نوع وحدة الرحلة: وحدة الرحلة الحرارية المغناطيسية, providing both long-time delay protection against overload and instantaneous protection against short-circuit.
الجهد المقنن: AC 400V/415V (for 3P/4P configurations), compliant with the GB 14048.2 معيار.
ثانيا. Functional Features and Application Scenarios
1. Safety Protection Functions
الحماية الحالية المتبقية: When the residual current in the line exceeds the set value, the circuit breaker trips immediately to prevent electric shock and electrical fires.
Overload/Short-Circuit Protection: The thermal-magnetic trip unit automatically adjusts the operating time according to the current magnitude to avoid equipment damage.
حماية من انخفاض الجهد: An optional under-voltage release (to be ordered separately) is available, which disconnects the circuit when the voltage drops below the set value.
2. التصميم الهيكلي
Four-Pole Design: Adopts a 3P+N structure. The N pole is only used for neutral wire connection, does not participate in overcurrent protection, and ensures stability when the three-phase load is balanced.
Dual Protection: Features double protection with an upper cover and a middle cover, achieving an IP30 protection rating (excluding terminals), and is suitable for complex environments with dust or humidity.
طريقة التثبيت: Fixed installation with front-panel wiring, supporting both vertical and horizontal installation.
3. التطبيقات النموذجية
توزيع الطاقة السكنية والتجارية: Suitable for main incoming line protection in household distribution boxes and small commercial stores, providing residual current and overload protection.
التحكم الصناعي: Used for short-circuit protection in motor control circuits or as a protection switch for branch circuits.
Temporary Power Supply: Provides power protection for construction sites and temporary equipment to prevent residual current and short-circuit accidents.
ثالثا. Market Price and Purchase Recommendations
1. مرجع السعر
واتس اب: 0086-13811255435. The reference price is approximately 661 يوان لكل وحدة (packaged as 1 unit/box, 16 units/carton). For bulk orders, the price is about 300-400 يوان لكل وحدة.
2. Purchase Notes
تأكيد النموذج: Ensure the model is NXMLE-125S/4300A-100A to avoid confusion with similar models (على سبيل المثال, NXMLE-125S/4310A is a 3P+N model with an alarm function).
Residual Current Selection: For household use, the 30-50-100mA range is preferred; for industrial scenarios, the 100-200-300-500mA range is recommended.
النموذج البديل: If the above model is out of stock, NM1LE-125S/4300A-100A (with a breaking capacity of 30kA and a price of approximately 268 يوان) يمكن استخدامه كبديل. لكن, it is necessary to confirm the compatibility of installation dimensions and parameters.
رابعا. النقاط الرئيسية للتركيب والصيانة
1. مواصفات التثبيت
متطلبات الأسلاك: Connect the power supply to the incoming terminal and the load to the outgoing terminal. The N pole must be connected to the neutral wire, and mixing it with the ground wire is strictly prohibited.
مساحة التثبيت: Sufficient clearance (≥20mm) must be reserved to ensure heat dissipation and operational safety. Vertical installation is recommended to facilitate arc extinction.
Insulation Testing: قبل التثبيت, use a 500V megohmmeter to test the insulation resistance, which should be ≥10MΩ to prevent damage to the electronic circuit board.
2. الصيانة اليومية
التفتيش المنتظم: اضغط على “زر الاختبار” monthly to test the residual current function, and check whether the terminal blocks are loose annually.
Environment Monitoring: Avoid using the product in environments with high temperature (>40درجه مئوية), رطوبة عالية (>90%RH), or corrosive gases.
استكشاف الأخطاء وإصلاحها: After tripping, troubleshoot the fault before closing the circuit again. في حالة حدوث تعثر متكرر, check whether the line insulation is intact or if the load is overloaded.
V. Certification and Technical Support
1. Certification Information
– Has passed the CCC Certification (رقم الشهادة: 202407…), and complies with the GB 14048.2 واللجنة الانتخابية المستقلة 60947-2 المعايير.
– Some models have obtained CE and CB Certifications, making them suitable for export projects.
ملخص
Chint NXMLE-100S/4300A-100A is a cost-effective residual current circuit breaker, suitable for various low-voltage power distribution scenarios. During model selection and use, it is necessary to select the residual current range according to actual load requirements, strictly follow the installation specifications, and perform regular maintenance to ensure safe and reliable operation. If a substitute model is needed, priority can be given to the NM1LE series of the same brand, but attention should be paid to parameter differences.
