Contacteur Chint CJ20-630A/380V AC

The Chint CJ20-630A/380V AC contactor is an industrial control device specifically designed for high-power circuits. It is suitable for circuits with AC 50Hz, rated voltage of 380V, and rated current of 630A. It is mainly used for remotely connecting and disconnecting circuits, and can cooperate with thermal overload relays to realize motor protection.

1. Core Technical Parameters and Structural Design
2. Performances électriquesChint AC contactor

Courant nominal: 630UN (under AC-3 service category, it can control a three-phase squirrel-cage motor with a maximum power of approximately 315kW).

Durée de vie électrique: 1 million times (under AC-3 duty system), and the mechanical life reaches 6 million times, reflecting high reliability.

Tension de bobine: Supports AC 380V, 220V, 127V, etc., and DC 220V is optional, adapting to various control circuit requirements.

2. Structural FeaturesBobine de contacteur AC Chint NXC-25-220V

Arc Extinguishing System: Adopts a plastic grid arc extinguishing cover, which can quickly extinguish the arc generated when breaking large currents, ensuring the service life of contacts and breaking reliability.

Contact Material: Silver-based alloy contacts with excellent anti-welding performance, which can maintain stable conductive performance after long-term use.

Méthode d'installation: Supports screw fixing or 35mm standard rail mounting (for some models), with an inclination not exceeding ±5°, adapting to various industrial environments.

3. Auxiliary FunctionsPrix ​​​​du disjoncteur CHINT

Contacts auxiliaires: Specifications of 250A and above are equipped with 4 normally open and 2 normally closed auxiliary contacts as standard, which can expand control logic (such as interlocking, signal feedback).

Energy-saving Module: Models CJ20-63 and above can be optionally equipped with AC silent energy-saving (J) or AC/DC universal energy-saving (JZ) modules to reduce energy consumption and noise.

1. Scénarios d'application et exigences d'installation
2. Applications typiques

Industrial Drive: Motor control in large factories (such as water pumps, les fans, compresseurs), supporting frequent start-stop and forward-reverse operations.

Power Distribution System: Cooperates with circuit breakers and fuses to build highly reliable power distribution nodes.

Environnements spéciaux: Adapts to an ambient temperature of -5℃~+40℃, altitude ≤2000m, and relative humidity ≤90% (pas de condensation), meeting the needs of most industrial scenarios.

2. Spécifications d'installation

Exigences de câblage: The main contacts should use copper cables with a cross-sectional area of ≥185mm² or 50×5mm copper bars, and the tightening torque should reach 14N·m to ensure low-resistance connection.

Environmental Protection: Avoid installation in environments with strong vibration, flammable gases or corrosive media, and it is recommended to reserve sufficient heat dissipation space.

III. Troubleshooting and Maintenance Suggestions

1. Common Problems and Solutions

Contactor Not Pulling In: Check if the coil voltage is normal (needs to reach 85%~110% of the rated value), clean the oil stains on the iron core pole surface, and eliminate mechanical jamming.

Contact Welding: If the load side is short-circuited or the operation frequency is too high, resulting in contact adhesion, the contacts need to be replaced and the circuit protection device should be checked.

Coil Overheating: Avoid voltage fluctuations exceeding ±10%, ensure the ambient temperature does not exceed +40℃, and replace the suitable coil if necessary.

2. Cycle d'entretien

Daily Inspection: Clean the dust on the shell monthly, and check the contact wear (replace when the silver layer thickness is <0.5mm).

Annual Maintenance: Test the contact resistance (should be ≤50μΩ), verify the integrity of the arc extinguishing cover, and tighten all terminals.

1. Certification et conformité

This model has passed China Compulsory Certification (CCC certification), with the certificate number 2002010304009742, valid until November 8, 2020. It is recommended to confirm whether the current product still meets the latest industry standards (such as GB/T 14048.4-2010) through Chint’s official website or authorized dealers.

1. Purchase and Alternative Solutions
2. Référence de prix

The price of official channels (such as Chint Electric Mall) il s'agit de 5257 yuans par unité, and the quotation from third-party platforms (WhatsApp: 0086-13811255435) is about yuan per unit. Attention should be paid to configuration differences (such as the number of auxiliary contacts, whether it contains an energy-saving module).

2. Modèles alternatifs

NC2 Series: Chint’s new generation contactor (such as NC2-630) adopts a modular design, supports more flexible expansion of auxiliary functions, and the mechanical life is increased to 10 million times, which can be used as an upgrade option.

1. Safety Warnings
2. Operation Specifications

Power must be cut off during installation and maintenance, and it should be operated by professional electricians to avoid the risk of electric shock.

It is prohibited to use in flammable and explosive environments to prevent explosions caused by arcs.

2. Exigences environnementales

Waste products must be disposed of according to electronic waste standards to avoid environmental pollution.

The core technical parameters of the Chint CJ20-630A/380V AC contactor are sorted out below, combining official data and industry standards:

1. Electrical Performance Parameters

1. Structure and Material Parameters

III. Environmental Adaptability Parameters

1. Shape and Physical Parameters

1. Key Performance Indicators
2. Action Characteristics

Pull-in voltage: 85%~110% of rated voltage<br>

Release voltage: 20%~75% of rated voltage (for ordinary type) or 10%~75% (for energy-saving type).

2. Insulation Performance

Power frequency withstand voltage: 3000V/1min between main contacts, 2500V/1min between main contacts and coil.

1. Typical Application Parameters

VII. Usage Notes

1. Spécifications de câblage

The main circuit terminals must be tightened with a torque wrench according to 14N·m to avoid heating caused by virtual connection.

2. Cycle d'entretien

Check the contact wear every quarter (replace when the silver layer thickness is <0.5mm), and verify the integrity of the arc extinguishing cover every year.

3. Alternative Solutions

Upgrade model: Chint NC2-630 contactor, with mechanical life increased to 10 million times, supporting modular expansion.