Chint NM8N-1600SEM 3P 1250A 50kA Moulded Case Circuit Breaker

1. Model Code Definition

2. المعلمات التقنية الأساسية

3. Core Functions of Electronic Intelligent Trip Unit (E-Type)
4. Full-range Protection: Accurate four-stage protection including long delay (الوقت العكسي), تأخير قصير (fixed/inverse time), رحلة فورية (fixed time) and earth fault (fixed/inverse time).
5. Monitoring Function: Real-time monitoring of three-phase current, fault current and operating status, with fault memory.
6. Adjustable Parameters: Flexible adjustment of protection current and delay time for customized protection in various distribution systems.
7. Communication Expansion: Optional Modbus-RTU communication module for remote monitoring and data transmission.
8. Comprehensive Protection Features: الزائد, ماس كهربائى, under-voltage, phase loss and three-phase unbalance protection to prevent equipment damage and electrical fire hazards.
9. سيناريوهات التطبيق
10. توزيع الطاقة الصناعية: Incoming/outgoing circuit protection for main distribution cabinets in workshops and production lines; control circuits for large-capacity motors.
11. المباني التجارية: Distribution trunk protection for shopping malls, الفنادق, office buildings and large commercial complexes.
12. بنية تحتية: Secondary power distribution protection for hospitals, المدارس, data centers and other key facilities.
13. Energy Systems: Low-voltage distribution protection for photovoltaic power stations, wind power systems and substations.
14. حماية المحرك: Overload and short-circuit protection for infrequently started large-capacity motors (مضخات المياه, المشجعين, الضواغط, إلخ.).
15. Complete Accessory List (Classified by Function)

5.1 عملية & Control Accessories

5.2 Auxiliary & Alarm Accessories

5.3 اتصال & Mounting Accessories

5.4 أمان & Expansion Accessories

6. Cross-Brand Equivalent Comparison (Mainstream MCCB)

7. اختيار & Procurement Guidelines
8. كسر اختيار القدرات: 50kA standard S type for general industrial and commercial distribution; select H type (70ال) or HH type (100ال) for higher breaking requirements.
9. اختيار وحدة الرحلة: Electronic intelligent E-type for precise protection and remote monitoring; thermal-magnetic T-type for conventional distribution scenarios.
10. نوع التركيب: Low-cost fixed type (م); replaceable plug-in type (ص); draw-out type (د) for critical load maintenance.
11. تكوين الملحقات:

Essential: 1~2 sets of auxiliary contacts and under-voltage trip for basic control and protection.

خياري: Electric operating mechanism, communication module and residual current module to enhance intelligence and safety.

5. Certification Compliance: Compliant with GB14048.2 and IEC 60947-2, with CE & UL certifications to ensure product quality and operational safety.

Chint NM8N Series MCCB Complete Model List & Price Guide

1. Complete Naming Rule

NM8N-□□□□-□□-□□-□P

2. Full Model List by Frame Size

2.1 125إطار (NM8N-125)

2.2 250إطار (NM8N-250)

2.3 400إطار (NM8N-400)

2.4 630إطار (NM8N-630)

2.5 800إطار (NM8N-800)

2.6 1250إطار (NM8N-1250)

2.7 1600إطار (NM8N-1600)

3. Special Series

3.1 DC MCCB (NM8NDC)

3.2 Leakage Protection MCCB (NM8NL)

4. Price Factors & Purchasing Advice

4.1 Price Influencing Factors

4.2 Selection Tips

1. كسر القدرة: س(50ال) for general use; ح(70ال) for heavy industrial; ر(100ال) for key facilities.
2. Trip Unit: TM for conventional distribution; EM for intelligent monitoring and precise protection.
3. Mounting Solution: Fixed for cost-saving; Plug-in for easy replacement; Draw-out for critical loads.
4. شهادة: Meet GB & IEC standards with CE/UL certification for global project delivery.
5. Quick Selection Reference

ملحوظة: جميع الأسعار 2026 April market reference prices. Actual prices vary by purchase quantity, region and distributor. Confirm official quotation from authorized Chint dealers before ordering.