المقاولين,قاطع الدائرة,العاكس للطاقة الشمسية,عداد كهرباء,البطاريات الشمسية
Chint CJ20-100 is an موصل التيار المتردد suitable for the field of industrial control. It is mainly used for remotely connecting and disconnecting circuits, and can be used in conjunction with a thermal overload relay to achieve overload protection for motors. The following are its detailed technical parameters and application instructions:
1. Core Technical Parameters
– تصنيف التشغيل الحالي: 100أ, suitable for controlling three-phase motors with a maximum power of 50kW (ايه سي-3, 380V).
– Voltage Range:
– Rated Insulation Voltage of Main Circuit: 660V, applicable to AC 50Hz/60Hz circuits.
– Optional Control Coil Voltage: AC 110V, 127V, 220V, 380V (50هرتز), which should be selected according to actual control requirements.
– نظام الاتصال:
– جهات الاتصال الرئيسية: 3 sets of normally open (3لا), adopting a double-break direct-acting structure, equipped with a clay longitudinal slot arc-extinguishing cover, featuring high breaking capacity.
– جهات الاتصال المساعدة: 2 sets of normally open (2لا) + 2 مجموعات مغلقة عادة (2نورث كارولاينا) by default, which can be expanded to 4 sets through an expansion module (على سبيل المثال, F4 series).
– Service Life Indicators:
– الحياة الميكانيكية: 10 مليون عملية; الحياة الكهربائية: 1.2 مليون عملية (ايه سي-3, 380V).
– Operating Frequency: Up to 600 operations per hour under AC-3 category.
2. التثبيت والأسلاك
– طرق التثبيت:
– Screw Fixing: Suitable for fixing on control cabinets or mounting plates. It is necessary to ensure that the inclination angle between the mounting surface and the vertical plane does not exceed ±5°.
– تركيب السكك الحديدية: Some documents do not clearly state that rail mounting is supported, but the CJ20-10~25A models support 35mm DIN rail mounting. It is inferred that the CJ20-100 may need to be used with an adapter.
– مواصفات الأسلاك:
– Main Contact Wiring: It is recommended to use wires with a cross-sectional area not exceeding 50mm², adopting the front-panel wiring method.
– Coil Wiring: Wires should be selected according to the coil voltage, and attention should be paid to polarity (AC coils have no polarity).
3. Matching and Protection
– Thermal Overload Relay:
– Recommended Model: JR20-160 (5W range, rated current range: 85~100~115A), which is directly connected to the contactor through a conductive plate to achieve overload and phase-failure protection.
– Protection Characteristics: When the current exceeds the rated range, the thermal relay acts within a certain period of time to cut off the control circuit.
– Fuse: It is recommended to match with RT16-250 type fuses (breaking capacity: 50ال) for short-circuit protection.
4. سيناريوهات التطبيق
– التحكم في المحركات: Suitable for AC-3 category loads (على سبيل المثال, frequent starting and stopping of squirrel-cage motors), and can control motors below 50kW.
– الأتمتة الصناعية: Widely used in the electrical control systems of equipment such as machine tools, مضخات, and fans, supporting remote operation and interlock control.
– بيئات خاصة: Operating temperature range: -5℃~+40℃, altitude not exceeding 2000m, pollution degree Class 3, which can adapt to general industrial environments.
5. Alternative Models and Upgrade Solutions
– Chint NXC Series: على سبيل المثال, NXC-115, which has a smaller size, lower power consumption (coil pull-in power: 550VA → 450VA), supports rail mounting, and its electrical life is increased to 2 مليون عملية.
– Schneider LC1-F Series: على سبيل المثال, LC1-F115, which is compatible with the installation dimensions of CJ20-100, has an electrical life of up to 1.5 مليون عملية, and is suitable for high-end applications.
6. احتياطات
– Model Selection Verification: The model should be strictly matched according to the actual load type (AC-3/AC-4), الجهد االكهربى, and current to avoid overload operation.
– التركيب والصيانة:
– Regularly check the wear condition of the contacts; when the contact thickness is worn by more than 1/3, it should be replaced.
– Ensure that the arc-extinguishing cover has no cracks or dust accumulation to avoid affecting the breaking performance.
– Price Reference:
– The market price of a single CJ20-100 (AC220V coil) is approximately 150~200 RMB, and the JR20-160 thermal overload relay is approximately 100 يوان.
7. Standards and Certifications
– It complies with GB/T 14048.4 واللجنة الانتخابية المستقلة 60947-4-1 المعايير, and has passed the CCC certification, ensuring safety and reliability.
（Note: GB/T refers to “National Standard of the People’s Republic of China”; CCC is the “China Compulsory Certification” mark, a mandatory safety certification system for products sold in the Chinese market.）
