المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
The Chint NXC-75/220V تكييف قواطع is a commonly used industrial-grade control device suitable for controlling three-phase loads with a rated current of 75A and a coil voltage of 220V. Below is a detailed analysis of this contactor model:
- Basic Parameters and Specificationsموصلات شنايدر LC1DN3210 و Chint NXC32
- المعلمات المقدرةChint DC المقاولين NC1-5011-36V
معنى النموذج: NXC-75 (design series)/220V (coil voltage)
التصنيف الحالي: 75أ (can control 37kW three-phase motors under AC-3 usage category)
الجهد لفائف: 220الخامس و (50/60هرتز)
Pole Configuration: 3 أقطاب (الاتصالات الرئيسية) + 2 مفتوحة عادة (لا) + 2 مغلقة عادة (نورث كارولاينا) auxiliary contacts
الحياة الميكانيكية: 10 مليون عملية
الحياة الكهربائية: 1 مليون عملية (AC-3 category)
- سيناريوهات التطبيقالأسلاك من موصل Delixi AC
– يبدأ, قف, and forward/reverse control of three-phase motors
– On/off control of electric heating equipment and lighting circuits
– Combined with thermal relays to form motor protection circuits
- Core Structure and Terminal DescriptionCHINT AC contactor CJX2
- Appearance and Components
(Schematic diagram; actual product may vary)
- Terminal Layout
| نوع المحطة | Identification/Number | Function Description |
| جهات الاتصال الرئيسية | L1/T1, L2/T2, L3/T3 | Three-phase power input/output (L1-L3 for power supply, T1-T3 for load) |
| محطات لفائف | أ1, A2 | 220V coil power supply (A1 to live wire, A2 to neutral wire) |
| جهات الاتصال المساعدة | 13/14 (لا), 21/22 (نورث كارولاينا) | Control circuit signal feedback (NO/NC) |
| Thermal Relay Interface | 95/96, 97/98 | Connect to thermal relay for overload protection |
ثالثا. Typical Application Wiring Diagrams
سيناريو 1: Direct Start Control of Three-Phase Motor
Explanation:
– قواطع دوائر (س): Protects the circuit from overloads and short circuits
– المقاولين (كم): Main contacts control motor power supply; coil A1/A2 connected to 220V
– Start Button (SB1): When pressed, the coil is energized, main contacts close, and the motor starts
سيناريو 2: Motor Control with Overload Protection
Explanation:
– Thermal Relay (FR): Connected to the main circuit via terminals 95/96; NC contacts 97/98 are wired in series in the control circuit
– During overload, the bimetallic strip in FR heats and bends, opening the NC contacts, de-energizing the contactor coil, and stopping the motor
- احتياطات التثبيت والاستخدام
- المتطلبات البيئية
– نطاق درجة الحرارة: -5°C ~ +40°C
– Humidity: ≤95%RH (no condensation)
– Altitude: ≥2000 متر
- خطوات التثبيت
– Install vertically to maintain heat dissipation space
– Use M8 bolts for main circuit terminals, tightening torque 8-10N·m
– Use 0.75-2.5mm² wires for control circuits to ensure good contact
- النقاط الرئيسية للصيانة
– Regularly clean oxide layers on contact surfaces
– Check for loose bolts (at least once a year)
– Coil temperature rise should not exceed 65K (at 40°C ambient temperature)
- Common Faults and Solutions
| Fault Phenomenon | الأسباب المحتملة | الحلول |
| Coil not energizing | Power not connected, coil burned out, mechanical jamming | Check voltage, replace coil, clean components |
| Contact overheating | Poor contact, excessive load, contact oxidation | Tighten terminals, تقليل الحمل, polish contacts |
| Not releasing after power-off | Residual magnetism in core, contact adhesion | Replace core, clean or replace contacts |
| Excessive noise | Broken core short-circuit ring, voltage fluctuations | Replace core, stabilize power supply voltage |
- Selection Alternatives
If NXC-75 is out of stock, consider the following alternative models:
Schneider LC1-D75: Same specifications, strong compatibility
Siemens 3TF52: Higher reliability, suitable for critical applications
ABB A9-40/75: تصميم وحدات, easy to expand
ملحوظة: When replacing, confirm that coil voltage, contact capacity, and installation dimensions are consistent.
ملخص
The Chint NXC-75/220V AC contactor is a reliable industrial control component that can effectively manage three-phase loads through proper wiring and maintenance. قبل الاستخدام, verify power supply compatibility and prioritize control circuits with overload protection to extend equipment life and ensure safety.
