Chint CJ20-630A/380V AC contactor

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. 電気的性能Chint AC contactor

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

電気的寿命: 1 百万回 (under AC-3 duty system), and the mechanical life reaches 6 百万回, reflecting high reliability.

コイル電圧: Supports AC 380V, 220V, 127V, 等, and DC 220V is optional, adapting to various control circuit requirements.

2. Structural FeaturesChint AC コンタクタ コイル 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.

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

3. 補助機能CHINT サーキットブレーカーの価格

補助接点: Specifications of 250A and above are equipped with 4 通常は開いており、 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. Application Scenarios and Installation Requirements
2. 代表的な用途

Industrial Drive: Motor control in large factories (such as water pumps, ファン, コンプレッサー), supporting frequent start-stop and forward-reverse operations.

配電システム: Cooperates with circuit breakers and fuses to build highly reliable power distribution nodes.

特殊な環境: Adapts to an ambient temperature of -5℃~+40℃, 標高 ≤2000m, and relative humidity ≤90% (結露なし), meeting the needs of most industrial scenarios.

2. 設置仕様

配線要件: 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.

環境保護: 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. よくある問題と解決策

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. メンテナンスサイクル

日常点検: 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. 認証とコンプライアンス

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. 参考価格

The price of official channels (such as Chint Electric Mall) についてです 5257 単位あたり元, and the quotation from third-party platforms (ワッツアップ: 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. 代替モデル

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 百万回, which can be used as an upgrade option.

1. 安全上の警告
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. 環境要件

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. 電気的性能パラメータ

1. Structure and Material Parameters

Ⅲ. 環境適応パラメータ

1. Shape and Physical Parameters

1. Key Performance Indicators
2. Action Characteristics

プルイン電圧: 85%定格電圧の ~110%<br>

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

2. 断熱性能

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

1. Typical Application Parameters

Ⅶ. 使用上の注意

1. 配線仕様

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

2. メンテナンスサイクル

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. 代替ソリューション

Upgrade model: Chint NC2-630 contactor, with mechanical life increased to 10 百万回, supporting modular expansion.