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Posicionamiento central: The Chint CJX2-9511 is a 3-pole contactor de CA with a rated current of 95A, equipped with 1 normalmente abierto (NO) + 1 normalmente cerrado (CAROLINA DEL NORTE) auxiliary contact. 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 | Meaning |
| 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 | Auxiliary contact configuration: 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, up to 690V |
| Corriente de funcionamiento nominal | 95A at AC-3, 400V; 132A at AC-1, 400V |
| Coil Voltage Options | 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) |
| Rated Impulse Withstand Voltage | 8kV |
| Vida mecánica | Aproximadamente 10 millones de operaciones |
| Vida eléctrica | Aproximadamente 1 million operations at AC-3, 400V, 95A |
| Rated Operating Frequency | Arriba a 1200 operations per hour (AC-3 utilization category) |
| Control Circuit Voltage | Coil voltage range: 85%~110% of rated voltage |
| Método de montaje | DIN rail mounting (35mm standard rail) 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. Functional Features
- 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, arc-resistant and anti-welding, 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: Standard DIN rail mounting, 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. 45kW at 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
Combined with thermal overload relays (p.ej., NR2 series) 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 |
| Power Matching | Can control ≤45kW three-phase asynchronous motors at 380V (AC-3) |
| Voltaje de la bobina | Select according to control circuit power supply (220V/380V commonly used, 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 times/hour), 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
| Alternative Model | Marca | Difference Description | Compatibilidad |
| NXC-9511 | chint (Kunlun Series) | Upgraded version of CJX2 series with improved performance and compatible dimensions | Fully 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
- Auxiliary Contact Expansion: Auxiliary contact modules such as F4-11 and F4-22 to increase the number of contacts
- Surge Suppression: 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. Low coil voltage; 3. Burned coil; 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 |
| Loud noise after pull-in | 1. Oil/dust on iron core end face; 2. Broken shading coil; 3. Low coil voltage | 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. Tighten wiring terminals |
| Coil burnout | 1. Excessively high voltage; 2. Frequent starting; 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 |
| Coil Resistance | Aprox.. 300~800Ω (depending on coil voltage) | Resistance of 0 (cortocircuito) or infinity (open circuit) 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
- Pre-installation Preparation:
Confirm that the model matches the load (actual, Voltaje, contactos auxiliares)
Check for no external damage and complete accessories (arc chute, 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.
Standard DIN rail mounting (35milímetros), fix firmly
Main circuit wiring: wire cross-section 16~35mm², double-hole wiring to ensure firm connection
Control circuit wiring: 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:
Regular inspection (recommended once a month):
Contact status (presence of ablation and oxidation)
Coil temperature (should not exceed ambient temperature +40°C)
Wiring terminals (presence of loosening and overheating)
Arc chute (presence of damage and carbonization)
Cleaning: Remove dust with dry brush, solvent use is prohibited
Lubrication: 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.
