Schütz,Leistungsschalter,Solarwechselrichter,Stromzähler,Solarbatterien
Kernpositionierung: The Chint CJX2-9511 is a 3-pole AC-Schütz with a rated current of 95A, equipped with 1 normalerweise offen (NEIN) + 1 normalerweise geschlossen (NC) Hilfskontakt. 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.
- Modellinterpretation
| Model Segment | Bedeutung |
| 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 Normalerweise geöffnet (NEIN) + 1 Normalerweise geschlossen (NC) |
- Technische Kernparameter
| Parameterelement | Specification Details |
| Contactor Type | AC coil contactor, 3-pole main contacts + 1NEIN + 1NC auxiliary contacts |
| Nennbetriebsspannung | Hauptstromkreis: Wechselstrom 50/60 Hz, up to 690V |
| Nennbetriebsstrom | 95A at AC-3, 400V; 132A at AC-1, 400V |
| Coil Voltage Options | AC 24V/36V/110V/220V/380V, compatible with 50/60Hz |
| Coil Power Consumption | Pull-in power approx. 1800VA, holding power approx. 180VA |
| Bemessungsisolationsspannung | 800V (entspricht IEC 60947-4-1 Standard) |
| Rated Impulse Withstand Voltage | 8kV |
| Mechanisches Leben | Etwa 10 Millionen Operationen |
| Elektrisches Leben | Etwa 1 million operations at AC-3, 400V, 95A |
| Rated Operating Frequency | Bis zu 1200 operations per hour (AC-3 utilization category) |
| Control Circuit Voltage | Coil voltage range: 85%~110% of rated voltage |
| Montagemethode | DIN rail mounting (35mm standard rail) or screw fixing |
| Verkabelungsmethode | Double-hole terminal blocks, main circuit applicable wire cross-section: 16~35mm² |
| Betriebstemperatur | -5°C ~ +40°C (can reach +40°C when relative humidity ≤50%, derating required at higher humidity) |
| Schutzklasse | IP20 (protects against finger contact and solid foreign objects with diameter ≥12mm) |
| Weight | Approximately 1.2kg |
III. Funktionsmerkmale
- 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
- Multiple Protection Mechanisms:
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, suitable for harsh industrial environments
- Flexible Wiring System: Double-hole terminal block design, more secure wiring, reducing loosening risk
- Wide Voltage Adaptability: Wide coil voltage range (85%~110%), adapting to power grid fluctuations
- Easy Installation: Standard-DIN-Schienenmontage, space-saving and convenient for quick replacement
- Application Scope
The CJX2-9511 contactor is suitable for the following industrial scenarios:
- Motorsteuerung:
Direct start/stop control of three-phase asynchronous motors (ca. 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
Kombiniert mit thermischen Überlastrelais (z.B., NR2 series) to form electromagnetic starters for overload protection
- Industrielle Automatisierung:
Executive component of PLC control systems
Bypass contactor for soft starters and frequency converters
Electrical control of machine tools, printing machinery and packaging equipment
- Auswahlempfehlungen
5.1 Wichtige Auswahlpunkte
| Selection Factor | Recommended Considerations |
| Lasttyp | 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) |
| Spulenspannung | Select according to control circuit power supply (220V/380V commonly used, 24V/36V/110V optional for special occasions) |
| Hilfskontakte | 1NO+1NC meets basic control needs; auxiliary contact modules can be added for more contacts |
| Operating Frequency | For frequent operation (>600 times/hour), derating is recommended or special high-frequency contactors should be selected |
| Umgebungsbedingungen | For high-temperature, humid and dusty environments, derating or protection class upgrade should be considered |
5.2 Alternative Modelle und Kompatibilität
| Alternative Model | Brand | Difference Description | Compatibility |
| 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: 1NC; 10: 1NEIN) | Consistent main circuit parameters, different auxiliary contacts |
5.3 Recommended Supporting Products
- Thermisches Überlastrelais: NR2-93 (setting current 63~93A), directly pluggable with CJX2-9511 to form an electromagnetic starter
- Überlastschutz: Motor protectors (z.B., 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
- Leitfaden zur Fehlerbehebung
6.1 Häufige Fehler und Lösungen
| Fehlerphänomen | Mögliche Ursachen | Troubleshooting Steps |
| Contactor fails to pull in | 1. Coil not powered; 2. Low coil voltage; 3. Burned coil; 4. Mechanical jamming | 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. Kontaktoxidation; 2. Spring fatigue; 3. Lose Verkabelung | 1. Clean contacts; 2. Replace auxiliary contact module; 3. Tighten wiring terminals |
| Durchbrennen der Spule | 1. Excessively high voltage; 2. Frequent starting; 3. Hohe Umgebungstemperatur | 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 | Approx. 300~800Ω (depending on coil voltage) | Resistance of 0 (Kurzschluss) oder Unendlichkeit (offener Stromkreis) 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 (aktuell, Stromspannung, auxiliary contacts)
Check for no external damage and complete accessories (arc chute, mounting bracket)
Select appropriate installation location (well-ventilated, von Wärmequellen und Vibrationsquellen fernhalten)
- Installationsspezifikationen:
Install after power cut, live operation is strictly prohibited
Standard-DIN-Schienenmontage (35mm), 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: vertical installation (iron core upward), tilt ≤5°
- Wichtige Wartungspunkte:
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)
Reinigung: Remove dust with dry brush, solvent use is prohibited
Lubrication: Oil application is prohibited on iron core end face, keep clean and dry
Austauschzyklus:
Mechanical life: ca. 10 Millionen Operationen, replacement is recommended after reaching the limit
Electrical life: ca. 1 Millionen Operationen (AC-3), replacement cycle should be shortened for frequent starting
VIII. Zusammenfassung
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.
