Contactor de curent alternativ Chint CJX2-9511

Core Positioning: The Chint CJX2-9511 is a 3-pole contactor AC with a rated current of 95A, equipped with 1 deschis în mod normal (NU) + 1 în mod normal închis (NC) 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.

Interpretarea modelului

Segmentul de model	Sens
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 Deschis normal (NU) + 1 În mod normal închis (NC)

Parametrii tehnici de bază

Element de parametru	Specification Details
Contactor Type	AC coil contactor, 3-contactele principale ale polului + 1NU + 1Contacte auxiliare NC
Tensiune nominală de operare	Circuitul principal: AC 50/60Hz, up to 690V
Curent nominal de operare	95A at AC-3, 400V; 132A at AC-1, 400V
Coil Voltage Options	AC 24V/36V/110V/220V/380V, compatible with 50/60Hz
Consumul de energie al bobinei	Pull-in power approx. 1800VA, holding power approx. 180VA
Tensiune nominală de izolație	800V (complies with IEC 60947-4-1 standard)
Tensiune nominală de rezistență la impuls	8kV
Viața mecanică	Aproximativ 10 milioane de operațiuni
Viața electrică	Aproximativ 1 million operations at AC-3, 400V, 95O
Frecvența nominală de operare	Până la 1200 operations per hour (AC-3 utilization category)
Control Circuit Voltage	Coil voltage range: 85%~110% din tensiunea nominală
Metoda de montare	Montare pe șină DIN (35mm șină standard) sau fixare cu șuruburi
Metoda de cablare	Double-hole terminal blocks, main circuit applicable wire cross-section: 16~35mm²
Temperatura de operare	-5°C ~ +40°C (can reach +40°C when relative humidity ≤50%, derating required at higher humidity)
Clasa de protectie	IP20 (protects against finger contact and solid foreign objects with diameter ≥12mm)
Greutate	Approximately 1.2kg

III. Caracteristici funcționale

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
Mecanisme de protecție multiple:

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, potrivit pentru medii industriale dure

Flexible Wiring System: Double-hole terminal block design, more secure wiring, reducing loosening risk
Adaptabilitate largă la tensiune: Wide coil voltage range (85%~110%), adapting to power grid fluctuations
Instalare ușoară: Standard DIN rail mounting, space-saving and convenient for quick replacement
Domeniul de aplicare

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

Controlul motorului:

Direct start/stop control of three-phase asynchronous motors (aproximativ. 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 (de ex., NR2 series) to form electromagnetic starters for overload protection

Automatizare industrială:

Executive component of PLC control systems

Bypass contactor for soft starters and frequency converters

Electrical control of machine tools, printing machinery and packaging equipment

Recomandări de selecție

5.1 Puncte cheie de selecție

Selection Factor	Recommended Considerations
Tip de încărcare	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)
Tensiunea bobinei	Select according to control circuit power supply (220V/380V commonly used, 24V/36V/110V optional for special occasions)
Contacte auxiliare	1NO+1NC meets basic control needs; auxiliary contact modules can be added for more contacts
Frecvența de operare	For frequent operation (>600 times/hour), derating is recommended or special high-frequency contactors should be selected
Condiții de mediu	For high-temperature, humid and dusty environments, derating or protection class upgrade should be considered

5.2 Alternative Models and Compatibility

Alternative Model	Marca	Descrierea diferenței	Compatibilitate
NXC-9511	Chint (Seria Kunlun)	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: 1NC; 10: 1NU)	Consistent main circuit parameters, different auxiliary contacts

5.3 Recommended Supporting Products

Releu termic de suprasarcina: NR2-93 (setting current 63~93A), directly pluggable with CJX2-9511 to form an electromagnetic starter
Protecție la suprasarcină: Motor protectors (de ex., 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 Common Faults and Solutions

Fenomen de eroare	Cauze posibile	Pași de depanare
Contactor fails to pull in	1. Coil not powered; 2. Low coil voltage; 3. Burned coil; 4. Blocaj mecanic	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. Cabluri slăbite	1. Clean contacts; 2. Replace auxiliary contact module; 3. Tighten wiring terminals
Coil burnout	1. Excessively high voltage; 2. Frequent starting; 3. High ambient temperature	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

Inspection Item	Normal Status	Abnormality Judgment
Coil Resistance	Aproximativ. 300~800Ω (depending on coil voltage)	Resistance of 0 (scurt-circuit) sau infinit (circuit deschis) 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

Pregătirea înainte de instalare:

Confirm that the model matches the load (actual, Voltaj, contacte auxiliare)

Check for no external damage and complete accessories (arc chute, mounting bracket)

Select appropriate installation location (well-ventilated, away from heat sources and vibration sources)

Specificații de instalare:

Install after power cut, live operation is strictly prohibited

Standard DIN rail mounting (35mm), fix firmly

Cablajul circuitului principal: wire cross-section 16~35mm², double-hole wiring to ensure firm connection

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

Direcția de instalare: vertical installation (iron core upward), tilt ≤5°

Maintenance Key Points:

Inspecție regulată (recommended once a month):

Contact status (presence of ablation and oxidation)

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

Borne de cablare (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:

Durata de viata mecanica: aproximativ. 10 milioane de operațiuni, replacement is recommended after reaching the limit

Durata de viata electrica: aproximativ. 1 milioane de operațiuni (AC-3), replacement cycle should be shortened for frequent starting

VIII. Rezumat

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. During selection, 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.