Chint CJ19-63/21 capacitor switching contactor

The Chint CJ19-63/21 is a capacitor switching contactor, mainly used in power circuits with an alternating current of 50Hz or 60Hz and a rated operating voltage of up to 380V, for the connection or disconnection of low-voltage shunt capacitors in low-voltage reactive power compensation equipment. The following is the relevant introduction:

- **Structural Features**: The contactor has a direct-acting double-break structure. The contact system is arranged in two layers, upper and lower. The upper layer has three pairs of current-limiting contacts and current-limiting resistors to form a inrush current suppression device. When closing, the current-limiting contacts are connected first. After a few milliseconds, the working contacts are connected. The permanent magnetic block in the current-limiting contacts is released under the reaction force of the spring, disconnecting the current-limiting resistor and enabling the capacitor to work normally. The CJ19-63 contactor has three pairs of auxiliary contacts. The wiring terminals are covered with insulating covers, which are safe and reliable. The coil wiring terminals are marked with voltage data to prevent incorrect connection.

The technical parameters of the Chint CJ19-63/21 contactor are as follows:

1. **Rated Voltage**: The rated operating voltage of the main circuit is up to 380V, and the rated insulation voltage is 690V.

2. **Rated Current**: The conventional heating current is 63A.

3. **Coil Parameters**: Coil voltage AC24 - 415V, coil frequency 50/60Hz, starting coil power 300VA, holding coil power 57VA.

4. **Auxiliary Contacts**: There are three pairs of auxiliary contacts, and "21" indicates two normally open and one normally closed.

5. **Inrush Current Suppression Capacity**: 20le.

6. **Working Environment**:  YouTube：https://youtube.com/shorts/7raw3Lj75G8

    - The ambient air temperature is between -5°C and +40°C, and the average value within 24 hours does not exceed +35°C.

    - The altitude does not exceed 2000m.

    - Under atmospheric conditions, when the maximum temperature is +40°C, the relative humidity of the air does not exceed 50%; at lower temperatures, a higher relative humidity is allowed. For example, it can reach 90% at 20°C.

    - The pollution degree is grade 3.

    - The installation category is category Ⅲ.

    - The inclination of the installation surface to the vertical plane is not greater than ±5°.

    - The product should be installed and used in places without significant shaking, impact and vibration.

7. **Installation Method**: It can be installed on a 35mm or 75mm standard snap rail.

    In addition, the rated insulation voltage of this contactor is 690V, the inrush current suppression capacity is 20le, the starting coil power is 300VA, and the holding coil power is 57VA. It can be installed on a 35mm or 75mm standard snap rail, which is convenient and fast.

 I. Core Technical Parameters and Functional Characteristics

1. **Analysis of Model Meaning**

   - **CJ19**: Series code, representing the capacitor switching contactor.

   - **63**: Rated current 63A (suitable for capacitor banks below 50kvar in a 380V system).

   - **21**: The configuration of auxiliary contacts is two normally open and one normally closed (13-14 normally open, 21-22 normally closed).

2. **Core Performance Indicators**

   - **Rated Operating Voltage**: AC380V (50Hz/60Hz), compatible with AC24-415V coil voltage.

   - **Inrush Current Suppression Capacity**: Built-in current-limiting resistors (the pre-charging circuit is connected first when closing, and the main contacts close after 0.1 seconds), which can limit the closing inrush current to within 5 times the rated current.

   - **Electrical Life**: It can reach 600,000 times under the AC-6b usage category (better than the industry average of 400,000 times).

3. **Structural Design Features**

   - **Double-break Direct-acting Contacts**: Strong breaking capacity. The arc extinguishing chamber is made of ceramic material and can withstand a peak short-circuit current of 100kA.

   - **Compatibility with Snap Rail Installation**: It supports installation on 35mm or 75mm standard guide rails. The wiring terminals are equipped with insulating covers, and the protection level is IP20.

II. Typical Application Scenarios

1. **Reactive Power Compensation System**

   - **Industrial Power Distribution**: In places with concentrated inductive loads such as steel plants and cement plants, the power factor can be improved (from 0.6 to above 0.95) by switching capacitor banks.

   - **Commercial Buildings**: In the central air-conditioning systems of shopping malls and office buildings, it dynamically compensates for the reactive power losses of the refrigeration units.

   - **New Energy Field**: At the output end of the inverters in photovoltaic power stations, it suppresses the impact of harmonics on the power grid.

2. **Adaptation to Special Environments**

   - **High Altitude Scenarios**: It has passed the certification for an altitude of 1500 meters and does not need to be derated for use in high-altitude areas.

   - **Humid Environment**: IP40 protection level (IP55 enclosure can be optionally equipped), suitable for water treatment plants and coastal facilities.

 III. Selection and Usage Suggestions

1. **Key Selection Parameters**

   - **Calculation of Rated Current**: Select it according to 1.5 times the rated current of the capacitor bank (for example, for a 50kvar/380V capacitor bank, the calculated current is 76A, and CJ19-95/21 should be selected).

   - **Coil Voltage Matching**: Give priority to selecting a voltage consistent with the control system (for example, if the PLC output is 24V, a DC24V coil needs to be customized).

   - **Accessory Expansion**: An F4-22 auxiliary contact group (adding two pairs of normally open and normally closed contacts) or an LA1-D11 indicator light module can be installed.

2. **Installation Precautions**

   - **Wiring Torque**: An 8-10N·m torque should be applied to the wiring terminals of the main contacts (use a torque wrench to ensure reliable contact).

   - **Phase Sequence Requirements**: The pre-charging circuit and the main contacts need to be wired corresponding to the phase sequence (L1-L1', L2-L2', L3-L3').

   - **Heat Dissipation Spacing**: An interval of more than 20mm should be maintained between adjacent contactors to avoid misoperation caused by temperature rise.

IV. Maintenance and Fault Troubleshooting

1. **Preventive Maintenance Cycle**

   - **Quarterly Inspection**: Clean the dust in the arc extinguishing chamber and measure the contact resistance of the main contacts (should be ≤ 50mΩ).

   - **Annual Verification**: Use a contactor test bench to verify the action time (the closing time ≤ 30ms, and the release time ≤ 50ms).

   - **Life Management**: Estimate the remaining life through the number of actions of the auxiliary contacts (it is recommended to replace it when the number of actions reaches 500,000 times).

2. **Common Fault Handling**

   - **Excessive Closing Inrush Current**: Check whether the pre-charging resistor is burned out (the normal resistance value should be 10-15Ω).

   - **Contact Adhesion**: Check whether the load current exceeds the rated value, or whether the arc extinguishing chamber is carbonized (the contact assembly needs to be replaced).

   - **Coil Burnout**: Measure the insulation resistance of the coil (should be ≥ 10MΩ) and check whether the control voltage is stable.

V. Procurement and Service Support in the Middle East Region

1. **Regional Authorized Dealers**

   - **Dubai**: hebei china Electric CO.,LTD （whatsapp:86-13811255435）

   - **Saudi Arabia**: hebei china Electric CO.,LTD （whatsapp:86-13811255435）

   - **Qatar**: hebei china Electric CO.,LTD （whatsapp:86-13811255435）  www.transformerandswitchgear.com

2. **Certification and Compliance**

   - **International Certification**: It complies with the IEC 60947-4-1 standard and has passed the CE certification (certificate number: CHNT-CE-003621).

   - **Middle East Standards**: It meets the requirements of the GSO Gulf Standardization Organization and can provide SASO certification documents.

3. **After-sales Service**

   - **Warranty Policy**: There is a 18-month warranty from the date of purchase. For man-made damage, paid maintenance is required.

VI. Comparison with Competitors and Alternative Solutions

If you need to further understand the price, delivery time or customized solutions, you can directly contact the Chint Middle East regional sales manager (email: sales000888@gmail.com). For bulk purchases (≥ 500 units), a 15% discount and free on-site technical support can be applied for.