Chint Contactor NXC18-380V

The Chint Contactor NXC18-380V belongs to the Kunlun Series AC contactors, specifically designed for industrial control applications.

1. Parametrii tehnici de bază
2. Main Circuit Parameters

Curent nominal de operare: 18O (under AC-3 utilization category, corresponding to 380V/400V main circuit voltage).

Tensiune nominală de izolație: 690V, capable of adapting to voltage fluctuations in complex industrial environments.

Configurația stâlpului: 3-stâlp deschis în mod normal (NU) contactele principale, supporting three-phase motor control.

Capacitate de rupere: Rated making current is 180A (10×Ie), and breaking current is 144A (8×Ie), meeting the requirements of frequent starting and stopping.

2. Control Circuit Parameters

Tensiunea bobinei: 380V și (50Hz), directly compatible with industrial standard control voltages.

Power Consumption Characteristics: Pull-in power consumption is approximately 40-60VA, and holding power consumption is only 2-7VA, featuring significant energy-saving effects.

Operating Range: Pull-in voltage ranges from 70% la 120% of the rated value, and release voltage ranges from 20% la 70% of the rated value, ensuring reliable triggering.

3. Configurarea contactelor auxiliare

Built-in Contacts: 1 deschis în mod normal (NU) + 1 în mod normal închis (NC) auxiliary contact, enabling extended control logic.

Capacitate de contact: The rated current of auxiliary contacts is 5A, supporting signal feedback or interlock control.

1. Caracteristici mecanice și de mediu
2. Proiectare structurală

Metoda de montare: Supports 35mm DIN rail clipping or screw fixing, compatible with standardized control cabinet layouts.

Dimensions and Weight: Compact design with dimensions of 88mm×45mm×75mm and a weight of 367g, economisind spațiu și facilitând întreținerea.

Clasa de protectie: IP20 (protejează împotriva pătrunderii obiectelor străine solide mai mari de 12 mm), potrivit pentru medii industriale convenționale.

2. Adaptabilitate la mediu

Temperatura de operare: -5℃~+40℃ (long-term), with extreme temperature resistance of -35℃~+70℃, adapting to wide-temperature environments.

Altitude Requirement: ≤2000 meters, meeting the needs of most industrial sites.

Vibration and Shock Resistance: The inclination of the mounting surface is ≤±5°, allowing stable operation in scenarios without significant vibration.

III. Application Scenarios and Supporting Solutions

1. Aplicații tipice

Controlul motorului: Directly controls 7.5kW three-phase asynchronous motors (under AC-3 category), compatible with fan and pump loads.

Automation Systems: Used for production line start-stop control and sequential logic interlocking, supporting PLC integration.

Power Distribution Systems: Combined with thermal overload relays (de ex., NR2 Series) pentru a forma demaroare electromagnetice, asigurand protectie la suprasarcina.

2. Selection and Matching

Fuse Matching: NT00-20 type fuses (gG20) are recommended for short-circuit protection.

Thermal Overload Relay Model: NR2-25/Z, with a rated current adjustment range of 12-18A, accurately matching load characteristics.

1. Certifications and Reliability

International Certifications: Certificat de CCC și CE, compliant with GB/T 14048.4/IEC 60947-4-1 standardele, applicable for export projects.

Service Life Indicators: Mechanical life of 12 milioane de operațiuni, electrical life of 1.2 milioane de operațiuni (under AC-3), meeting the requirements of long-term high-load operation.

Material and Technology: Silver alloy contacts have strong arc resistance, and the enhanced spring mechanism ensures rapid contact breaking, reducing the risk of welding.

1. Installation and Maintenance Key Points
2. Specificații de cablare

Circuitul principal: Supports 1.5-6mm² solid wires or 1-4mm² flexible wires, fastened with M3.5 screws (cuplul de strângere: 0.8N·m).

Circuit de control: 1-2.5mm² wires are connected to A1/A2 terminals; shielded wires are recommended for anti-interference.

. Commissioning Recommendations

Pull-in Test: Measure the coil resistance before power-on (approximately 1.2kΩ for the 380V specification) to verify coil integrity.

Contactați Inspecția: Regularly clean the oxide layer on the contact surface to ensure the contact resistance is ≤50mΩ.

1. Alternative Solutions and Upgrade Paths

For function expansion, the following upgrade solutions can be considered:

NXC-22 (22O): Enhanced current capacity, suitable for 11kW motor control.

NXC-25 (25O): Supports DC coil versions, compatible with DC control power supply systems.

Intelligent Contactors: De exemplu, NXC-18 paired with the iMCC control module, enabling remote monitoring and energy management.

VII. Typical Application Case

In a certain food processing production line, the NXC18-380V is used to control the conveyor belt motor:

Control Logic: PLC sends signals to drive the contactor to realize motor forward and reverse switching.

Protection Mechanism: Combined with the NR2 thermal overload relay, when the motor current exceeds 18A due to stalling, sursa de alimentare este întreruptă în interior 0.5 secunde.

Reliability Performance: It has operated continuously for 18 months without faults, with contact wear less than 0.1mm and the maintenance cycle extended by 30%.

VIII. Procurement and Compatibility Recommendations

Channel Selection: Purchase through Chint-authorized distributors (WhatsApp: 0086-13811255435) to ensure the products are accompanied by CCC certification and original factory quality assurance.

Verificarea compatibilităţii: Înainte de instalare, check that the coil voltage (380V și) matches the control cabinet power supply to avoid misoperation caused by voltage deviation.

With its high cost-effectiveness and stable performance, the NXC18-380V has become the preferred solution for small and medium-sized motor control, especially suitable for industrial scenarios requiring frequent starting/stopping and high reliability. When selecting the product, it is necessary to consider load characteristics and environmental conditions; if necessary, consult Chint technical support to obtain customized solutions.