Contator CA Chint CJX2-9511

Posicionamento central: The Chint CJX2-9511 is a 3-pole Contator CA with a rated current of 95A, equipped with 1 normalmente aberto (NÃO) + 1 normalmente fechado (NC) contato 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.

Interpretação do 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	Configuração de contato auxiliar: 1 Normalmente aberto (NÃO) + 1 Normalmente fechado (NC)

Parâmetros técnicos principais

Item de parâmetro	Specification Details
Contactor Type	AC coil contactor, 3-pole main contacts + 1NÃO + 1Contatos auxiliares NC
Tensão operacional nominal	Circuito principal: CA 50/60 Hz, up to 690V
Corrente operacional nominal	95A at AC-3, 400V; 132A at AC-1, 400V
Opções de tensão da bobina	AC 24V/36V/110V/220V/380V, compatible with 50/60Hz
Consumo de energia da bobina	Pull-in power approx. 1800VA, holding power approx. 180VA
Tensão nominal de isolamento	800V (complies with IEC 60947-4-1 padrão)
Tensão nominal suportável ao impulso	8kV
Vida Mecânica	Aproximadamente 10 milhões de operações
Vida Elétrica	Aproximadamente 1 million operations at AC-3, 400V, 95UM
Frequência operacional nominal	Até 1200 operations per hour (AC-3 utilization category)
Tensão do Circuito de Controle	Faixa de tensão da bobina: 85%~110% of rated voltage
Método de montagem	Montagem em trilho DIN (35trilho padrão mm) ou fixação por parafuso
Método de fiação	Double-hole terminal blocks, main circuit applicable wire cross-section: 16~35mm²
Temperatura operacional	-5°C ~ +40°C (can reach +40°C when relative humidity ≤50%, derating required at higher humidity)
Classe de Proteção	IP20 (protects against finger contact and solid foreign objects with diameter ≥12mm)
Peso	Approximately 1.2kg

III. Recursos funcionais

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
Múltiplos Mecanismos de Proteção:

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

Main contacts made of silver alloy material, resistente ao arco e anti-soldagem, improving reliability

Dust cover design, adequado para ambientes industriais agressivos

Flexible Wiring System: Double-hole terminal block design, more secure wiring, reducing loosening risk
Ampla adaptabilidade de tensão: Wide coil voltage range (85%~110%), adapting to power grid fluctuations
Fácil instalação: Montagem em trilho DIN padrão, space-saving and convenient for quick replacement
Escopo de aplicação

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

Controle Motor:

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

Control of continuous operation equipment such as fans, bombas de água e compressores

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 com relés de sobrecarga térmica (por exemplo, Série NR2) to form electromagnetic starters for overload protection

Automação 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

Recomendações de seleção

5.1 Principais pontos de seleção

Selection Factor	Recommended Considerations
Tipo de carga	Select AC-3 rated current for motor loads; select AC-1 rated current for resistive loads
Combinação de poder	Can control ≤45kW three-phase asynchronous motors at 380V (AC-3)
Tensão da bobina	Select according to control circuit power supply (220V/380V comumente usado, 24V/36V/110V optional for special occasions)
Contatos Auxiliares	1NO+1NC meets basic control needs; auxiliary contact modules can be added for more contacts
Frequência operacional	For frequent operation (>600 vezes/hora), derating is recommended or special high-frequency contactors should be selected
Condições Ambientais	For high-temperature, humid and dusty environments, derating or protection class upgrade should be considered

5.2 Modelos Alternativos e Compatibilidade

Modelo Alternativo	Marca	Descrição da diferença	Compatibilidade
NXC-9511	Chint (Série Kunlun)	Upgraded version of CJX2 series with improved performance and compatible dimensions	Totalmente compatível, pode ser substituído diretamente
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: 1NC; 10: 1NÃO)	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
Proteção contra sobrecarga: Motor protectors (por exemplo, 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
Guia de solução de problemas

6.1 Falhas e soluções comuns

Fenômeno de falha	Possíveis causas	Etapas de solução de problemas
Contactor fails to pull in	1. Coil not powered; 2. Low coil voltage; 3. Burned coil; 4. Bloqueio mecânico	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. Oxidação de contato; 2. Spring fatigue; 3. Fiação solta	1. Limpar contatos; 2. Replace auxiliary contact module; 3. Tighten wiring terminals
Queima da bobina	1. Excessively high voltage; 2. Partida frequente; 3. Alta temperatura ambiente	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

Item de inspeção	Normal Status	Abnormality Judgment
Coil Resistance	Aprox.. 300~800Ω (depending on coil voltage)	Resistance of 0 (curto-circuito) ou infinito (circuito aberto) 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

Preparação de pré-instalação:

Confirm that the model matches the load (atual, tensão, contatos auxiliares)

Check for no external damage and complete accessories (rampa de arco, suporte de montagem)

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

Especificações de instalação:

Install after power cut, operação ao vivo é estritamente proibida

Montagem em trilho DIN padrão (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

Direção de instalação: instalação vertical (iron core upward), tilt ≤5°

Pontos-chave de manutenção:

Inspeção regular (recommended once a month):

Status do contato (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)

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

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

Ciclo de Substituição:

Vida mecânica: aprox.. 10 milhões de operações, replacement is recommended after reaching the limit

Vida elétrica: aprox.. 1 milhões de operações (AC-3), replacement cycle should be shortened for frequent starting

VIII. Resumo

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 a seleção, 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.