Contactor de CA Chint CJX2-9511

Posicionamiento central: The Chint CJX2-9511 is a 3-pole contactor de CA with a rated current of 95A, equipado con 1 normalmente abierto (NO) + 1 normalmente cerrado (CAROLINA DEL NORTE) contacto auxiliar. It is suitable for AC 50/60Hz circuits, mainly used for remote switching on/off of circuits, frequent starting and control of three-phase AC motors. It can be combined with a thermal overload relay to form an electromagnetic starter for overload protection.

Interpretación del modelo

Segmento de modelo	Significado
CJX2	Chint AC contactor series code (equivalent and compatible with Schneider LC1D series)
95	Rated operating current of 95A (under AC-3 utilization category at 400V)
11	Configuración de contactos auxiliares: 1 Normalmente abierto (NO) + 1 Normalmente cerrado (CAROLINA DEL NORTE)

Parámetros técnicos básicos

Elemento de parámetro	Specification Details
Contactor Type	AC coil contactor, 3-contactos principales de polo + 1NO + 1NC auxiliary contacts
Tensión de funcionamiento nominal	Circuito principal: CA 50/60 Hz, hasta 690V
Corriente de funcionamiento nominal	95A en AC-3, 400V; 132A at AC-1, 400V
Opciones de voltaje de bobina	AC 24V/36V/110V/220V/380V, compatible with 50/60Hz
Consumo de energía de la bobina	Pull-in power approx. 1800Virginia, poder de retención aprox.. 180Virginia
Tensión nominal de aislamiento	800V (cumple con IEC 60947-4-1 estándar)
Tensión nominal de resistencia al impulso	8kV
Vida mecánica	Aproximadamente 10 millones de operaciones
Vida eléctrica	Aproximadamente 1 million operations at AC-3, 400V, 95A
Frecuencia de funcionamiento nominal	Arriba a 1200 operations per hour (AC-3 utilization category)
Control Circuit Voltage	Rango de voltaje de la bobina: 85%~110% of rated voltage
Método de montaje	Montaje en carril DIN (35carril estándar mm) or screw fixing
Método de cableado	Double-hole terminal blocks, main circuit applicable wire cross-section: 16~35mm²
Temperatura de funcionamiento	-5°C ~ +40°C (can reach +40°C when relative humidity ≤50%, derating required at higher humidity)
Clase de protección	IP20 (protects against finger contact and solid foreign objects with diameter ≥12mm)
Peso	Approximately 1.2kg

III. Características funcionales

High Compatibility Design: Same dimensions as Schneider LC1D series, directly interchangeable, compatible with various functional accessories
High-efficiency Energy-saving Coil: Adopts high-quality electromagnetic materials, pull-in/holding power ratio up to 10:1, with significant energy-saving effect
Múltiples mecanismos de protección:

Built-in overvoltage suppressor in the coil to extend coil service life

Main contacts made of silver alloy material, resistente al arco y antisoldadura, improving reliability

Dust cover design, adecuado para entornos industriales hostiles

Flexible Wiring System: Double-hole terminal block design, more secure wiring, reducing loosening risk
Amplia adaptabilidad de voltaje: Wide coil voltage range (85%~110%), adapting to power grid fluctuations
Fácil instalación: Montaje en carril DIN estándar, space-saving and convenient for quick replacement
Ámbito de aplicación

The CJX2-9511 contactor is suitable for the following industrial scenarios:

Control de motores:

Direct start/stop control of three-phase asynchronous motors (aprox. 45kilovatios a 380V)

Control of continuous operation equipment such as fans, water pumps and compressors

Control of frequent starting equipment such as conveyors and mixers

Electrical Control Systems:

Remote switching on/off of circuits in power distribution systems

Control of electric heating equipment and lighting systems

Combinado con relés de sobrecarga térmica (p.ej., Serie NR2) to form electromagnetic starters for overload protection

Automatización Industrial:

Executive component of PLC control systems

Bypass contactor for soft starters and frequency converters

Electrical control of machine tools, printing machinery and packaging equipment

Recomendaciones de selección

5.1 Puntos clave de selección

Selection Factor	Recommended Considerations
Tipo de carga	Select AC-3 rated current for motor loads; select AC-1 rated current for resistive loads
Coincidencia de poder	Can control ≤45kW three-phase asynchronous motors at 380V (AC-3)
Voltaje de la bobina	Select according to control circuit power supply (220V/380V de uso común, 24V/36V/110V optional for special occasions)
Contactos auxiliares	1NO+1NC meets basic control needs; auxiliary contact modules can be added for more contacts
Frecuencia de funcionamiento	For frequent operation (>600 veces/hora), derating is recommended or special high-frequency contactors should be selected
Condiciones ambientales	For high-temperature, humid and dusty environments, derating or protection class upgrade should be considered

5.2 Alternative Models and Compatibility

Modelo alternativo	Marca	Descripción de la diferencia	Compatibilidad
NXC-9511	chint (Kunlun Series)	Upgraded version of CJX2 series with improved performance and compatible dimensions	Totalmente compatible, can be directly replaced
LC1D9511	Schneider	Original design with consistent performance	Installation and electrically compatible, interchangeable
TGC1-9511	Tengen	Same specification product with more competitive price	Installation compatible, consistent functions
CJX2-9501/9510	chint	Different auxiliary contact configurations (01: 1CAROLINA DEL NORTE; 10: 1NO)	Consistent main circuit parameters, different auxiliary contacts

5.3 Recommended Supporting Products

Relé de sobrecarga térmica: NR2-93 (setting current 63~93A), directly pluggable with CJX2-9511 to form an electromagnetic starter
Protección contra sobrecarga: Motor protectors (p.ej., JD-5) can be optionally configured for more comprehensive protection
Expansión de contacto auxiliar: Auxiliary contact modules such as F4-11 and F4-22 to increase the number of contacts
Supresión de sobretensiones: RC snubber or varistor to protect coils and contacts
Troubleshooting Guide

6.1 Fallos comunes y soluciones

Fenómeno de falla	Posibles causas	Pasos para solucionar problemas
El contactor no logra entrar	1. Coil not powered; 2. Bajo voltaje de la bobina; 3. bobina quemada; 4. Atasco mecánico	1. Check control circuit power supply and wiring; 2. Measure coil voltage (should be ≥85% of rated value); 3. Measure coil resistance with multimeter (normal value approx. several hundred ohms); 4. Check if iron core is jammed and remove foreign objects
Ruido fuerte después de entrar	1. Oil/dust on iron core end face; 2. Broken shading coil; 3. Bajo voltaje de la bobina	1. Clean iron core end face; 2. Check shading coil (replace iron core if broken); 3. Adjust coil voltage to rated range
Contact overheating/ablation	1. Overload operation; 2. Poor contact connection; 3. Arc suppression failure	1. Check load current and replace with contactor of larger capacity; 2. Clean contacts and replace if severely ablated; 3. Check arc chute and ensure it is intact
Poor auxiliary contact connection	1. Contact oxidation; 2. Spring fatigue; 3. Cableado suelto	1. Clean contacts; 2. Replace auxiliary contact module; 3. Apretar los terminales del cableado
Quemado de bobina	1. Tensión excesivamente alta; 2. arranque frecuente; 3. Temperatura ambiente alta	1. Check power supply voltage and install overvoltage protection; 2. Reduce starting frequency or select high-frequency contactor; 3. Improve ventilation and lower ambient temperature

6.2 Contactor Status Judgment

Artículo de inspección	Normal Status	Abnormality Judgment
Resistencia de la bobina	Aprox.. 300~800Ω (depending on coil voltage)	Resistance of 0 (cortocircuito) or infinity (circuito abierto) is abnormal
Main Contact Voltage Drop	≤50mV when closed	Excessively high voltage drop indicates poor contact connection
Iron Core Pull-in	No obvious noise and slight vibration	Loud noise and obvious vibration are abnormal
Arc Chute	Intact without carbonization marks	Severe damage or carbonization requires replacement

VII. Installation and Maintenance Precautions

Preparación previa a la instalación:

Confirm that the model matches the load (actual, Voltaje, contactos auxiliares)

Check for no external damage and complete accessories (rampa de arco, mounting bracket)

Select appropriate installation location (bien ventilado, away from heat sources and vibration sources)

Especificaciones de instalación:

Install after power cut, La operación en vivo está estrictamente prohibida.

Montaje en carril DIN estándar (35milímetros), fix firmly

Cableado del circuito principal: wire cross-section 16~35mm², double-hole wiring to ensure firm connection

Cableado del circuito de control: wire cross-section 0.75~1.5mm², avoid laying in the same slot as main circuit

Installation direction: instalación vertical (iron core upward), tilt ≤5°

Puntos clave de mantenimiento:

Inspección periódica (recommended once a month):

Contact status (presence of ablation and oxidation)

Coil temperature (should not exceed ambient temperature +40°C)

Terminales de cableado (presence of loosening and overheating)

Arc chute (presence of damage and carbonization)

Cleaning: Remove dust with dry brush, solvent use is prohibited

Lubricación: Oil application is prohibited on iron core end face, keep clean and dry

Replacement Cycle:

Vida mecánica: aprox. 10 millones de operaciones, replacement is recommended after reaching the limit

vida electrica: aprox. 1 millones de operaciones (AC-3), replacement cycle should be shortened for frequent starting

VIII. Resumen

The Chint CJX2-9511 contactor is an industrial-grade contactor with high cost performance and high compatibility. With its 95A rated current and 1NO+1NC auxiliary contact configuration, it is widely used in the control of three-phase motors below 45kW and electrical systems. Durante la selección, comprehensive consideration should be given to factors such as load type, power and coil voltage. Installation and maintenance must strictly follow specifications to ensure safe and reliable operation. Compared with the Kunlun series NXC-9511, the CJX2-9511 has a more competitive price; compared with the Schneider LC1D9511, it has higher cost performance, making it an ideal choice in the field of industrial automation.