Chint NDK-50 control transformer

Chint NDK-50 control transformer is a single-phase dry-type transformer specially designed for industrial control scenarios. It is suitable for 50Hz/60Hz AC circuits and can convert input voltage into various standard output voltages to meet the control power, lighting and signal requirements of machine tools, automation equipment, distribution cabinets and other devices. The following is its core information and application guide:

 I. Technical Parameters and Performance Advantages

1. **Electrical Specifications**  

   - **Input Voltage**: Supports 380V or 220V single/double voltage input, and some models have multi-tap design (such as 380/220V combined input).  

   - **Output Voltage**: Various combinations such as 24V, 36V, 110V, 220V are optional. For example, the NDK-50VA 380/220/24V model can output 24V and 220V at the same time.  

   - **Capacity and Efficiency**: The rated capacity is 50VA, the conversion efficiency is ≥80%, the no-load loss is low, and it runs stably for a long time.  

   - **Protection Level**: It adopts vacuum impregnated insulation treatment, and the protective terminals ensure electrical clearance and creepage distance, making it suitable for harsh environments such as high altitude and humidity.

2. **Safety Design**  

   - It complies with the Q/ZT 258 enterprise standard, has overload protection and short-circuit protection capabilities, and the coil windings have high mechanical strength, which can withstand vibration and impact in industrial environments.  

   - The operating temperature range is -25℃~+40℃, the relative humidity is ≤95%, and the altitude is ≤2000 meters, which is suitable for a wide range of industrial application scenarios.

II. Application Scenarios and Typical Configurations

1. **Industrial Control Field**  

   - **Machine Tool Equipment**: Provides stable 24V control power for PLCs, contactors, relays, etc., and 36V safety voltage for lighting systems.  

   - **Automated Production Lines**: In equipment such as conveyor lines and robotic arms, convert 380V industrial voltage to 220V for sensors and human-machine interfaces.  

   - **Power Supply Equipment**: As a multi-voltage output module, it centrally supplies power to equipment of different voltage levels (such as 110V solenoid valves, 24V indicator lights).

2. **Installation and Wiring**  

   - **Dimensions and Installation**: The overall dimensions are approximately 148x155x153mm (BxDxE), supporting horizontal or vertical installation, and ensuring heat dissipation space.  

   - **Wiring Method**: The input and output terminals adopt a screw-fastened design. For multi-tap models, the corresponding pins should be selected according to the load requirements. For example, the NDK-50VA 380 220/36 24 12 6 model can realize multi-voltage output through jumpers.

III. Purchase Channels and Price Reference

**International Procurement (taking the United States as an example)**  

   - **Cross-border E-commerce**: Purchase by contacting Whatsapp: 0086-13811255435. Attention should be paid to international shipping costs and tariffs (accounting for about 15%~20% of the total commodity price).  

 IV. Usage Precautions and Maintenance

1. **Selection Suggestions**  

   - Select the capacity according to the total load power, and it is recommended to reserve 20% redundancy. For example, a 24V/2A load requires a transformer ≥48VA.  

   - Confirm that the input voltage matches the local power grid (such as 208V or 240V commonly used in the United States). If necessary, use an autotransformer for voltage adaptation.

2. **Troubleshooting**  

   - **No Output Voltage**: Check if the input fuse is blown, if the terminals are loose, or measure the input side voltage with a multimeter to see if it is normal.  

   - **Overheating or Noise**: If the load exceeds the rated capacity, reduce the load or replace with a larger capacity model; if the coil is short-circuited, contact after-sales service for replacement.

3. **Maintenance Suggestions**  

   - Regularly clean the surface dust and check the tightness of the terminals to avoid poor contact due to oxidation.  

   - Before long-term shutdown, power off and store in a dry place. When restarting, test the insulation resistance (should be ≥10MΩ).

V. Technical Support and Document Resources

1. **Official Support**  

   - Chint Global Customer Service Center provides 7x24-hour technical support, and inquiries can be submitted via email or online forms.  

   - The official website (chint.net) provides downloads of NDK series product manuals, including detailed technical parameters, wiring diagrams and installation guides.

2. **Alternative Model Reference**  

   - For higher capacity, NDK-100VA or NDK-200VA models can be selected; for three-phase input, NDK2 series (suitable for three-phase circuits below 500V) can be considered.

 VI. Adaptation Suggestions for the U.S. Market

1. **Voltage Adaptation**  

   - The commonly used power grids in the United States are 208V or 240V. The 380V input model of NDK-50 needs to be used with a step-down transformer (such as 240V to 380V), or a 220V input model can be directly connected to the 208V power grid (the output voltage will be slightly reduced, and load compatibility needs to be verified).

2. **Certification and Compliance**  

   - Although the NDK series has not passed UL certification, EMC and safety tests can be conducted through third-party laboratories to ensure compliance with the requirements of the U.S. NEC (National Electrical Code).

3. **Procurement Channels**  

   - It is recommended to purchase local brands with similar functions through industrial equipment distributors via Whatsapp: 0086-13811255435 to customize models that meet UL standards.

 Summary

Chint NDK-50 control transformer has become a mainstream choice in the industrial control field due to its high reliability, flexible voltage configuration and economical price. Users can choose the appropriate input and output combinations according to actual needs and obtain technical support through Chint's official channels. For U.S. users, attention should be paid to voltage adaptation and local compliance. If necessary, cross-border procurement or customized solutions can be used to meet the needs.