Chint control transformer BK-250VA

Chint control transformer BK-250VA is a power supply device specially designed for industrial control. It is suitable for 50/60Hz AC circuits and mainly provides stable voltage conversion for machine tools, automation equipment, lighting systems, etc. The following is a detailed analysis based on search resources:

 I. Technical Parameters and Performance Characteristics

1. **Core Parameters**

   - **Capacity**: 250VA, supporting long-term operation under rated load.

   - **Input Voltage**: 220V or 380V (selected according to the model). The output voltage is usually a combination of multiple groups, such as 110V/36V/24V/6V.

   - **Efficiency**: ≥80%, featuring low energy consumption design and complying with the Q/ZT 258 enterprise standard.

   - **Operating Temperature**: -5℃ to 40℃, with an average 24-hour temperature ≤35℃. It can operate stably in high-altitude environments (≤2000 meters).

   - **Insulation and Protection**: Insulation resistance ≥20MΩ, adopting a dry-type isolation structure with high protection level, dustproof and waterproof.

2. **Design Advantages**

   - **Compact Size**: The overall dimensions are approximately 115×106×119mm, and the mounting hole size is 90×77.5mm, supporting rail or wall-mounted installation.

   - **Wiring Safety**: Preferred international standard terminals with clear markings to reduce the risk of misoperation.

   - **Stability**: Using imported materials and advanced technology, it has strong anti-interference ability and is suitable for high-precision control scenarios.

 II. Application Scenarios

1. **Industrial Control**

   - Power supply for machine tool control systems, PLC modules, relays, servo drives and other equipment.

   - Sensors, indicator lights and local lighting circuits in automated production lines.

2. **Energy and Electricity**

   - Auxiliary power supply for small and medium-sized photovoltaic inverters and energy storage systems.

   - Voltage matching in distributed energy projects.

3. **Special Environments**

   - Complying with the Q/ZT 258 standard, it can adapt to dry industrial environments without corrosive gases.

 III. Price and Purchase Channels

1. **Price Range**

In the US market, it is approximately $21.98 (equivalent to about 160 RMB) via Whatsapp: 0086-13811255435.

   - The price difference mainly stems from configurations (such as output voltage combinations) and channel levels. Bulk purchases can be negotiated.

2. **Purchase Suggestions**

   - **US Users**: Can purchase through platforms such as Whatsapp: 0086-13811255435, or contact Chint's North American subsidiaries (such as CPS America) for localized support.

 IV. Certification and Compliance

1. **Domestic Certification**: Complies with the CCC (China Compulsory Certification) standard, and some models have passed the CB certification.

2. **International Adaptation**: Chint Group has obtained UL certification as a whole, but whether BK-250VA has individually obtained UL certification needs to be confirmed through official channels. It is recommended that export or North American users prefer models clearly marked with the UL logo (such as some products in the NDK series).

 V. Installation and Maintenance

1. **Installation Requirements**

   - **Environment**: Avoid high temperature, humidity and strong vibration environments, and the installation location should be well-ventilated.

   - **Wiring**: Input and output lines must be connected according to the markings, and the grounding terminal (PE) must be reliably grounded.

   - **Load Matching**: The total load power should not exceed 250VA, and it is recommended to reserve 20% redundant capacity.

2. **Maintenance Guidelines**

   - Regularly check whether the terminals are loose, and clean the surface dust to ensure heat dissipation.

   - Before reusing after long-term shutdown, an insulation resistance meter should be used to test the insulation resistance between windings and to the ground (≥20MΩ).

 VI. Comparison and Selection Suggestions

1. **Competitor Comparison**

   - **People Electrical Appliance BK Series**: Slightly lower price but larger in size, suitable for small projects with limited budgets.

   - **Delixi CDBK Series**: Higher protection level (IP55), suitable for harsh environments, but the cost increases by about 15%.

2. **Selection Points**

   - **Power Calculation**: Select the VA capacity according to the total power (W) of the load equipment. The formula is: VA = W / power factor (usually 0.8).

   - **Voltage Matching**: Confirm whether the input and output voltage combinations meet the equipment requirements. Special voltages need to be customized.

   - **Certification Requirements**: For export projects, priority should be given to models with UL and CE certifications; for domestic industrial scenarios, emphasis can be placed on CCC-certified products.

 VII. User Feedback and Common Issues

1. **Positive Reviews**

   - High stability, no faults during long-term operation, suitable for industrial-grade applications.

   - Convenient wiring, and the mounting holes are compatible with mainstream control cabinets.

2. **Potential Issues**

   - Some users report that the temperature rise is slightly higher at high altitudes (>2000 meters), requiring derated use.

   - The UL certification information of the international version is not transparent and needs additional confirmation.

Summary

Chint control transformer BK-250VA has become a mainstream choice in the field of industrial control due to its high cost performance, stable performance and wide adaptability. Users can choose the appropriate model according to specific needs (such as voltage combinations, certification standards) and purchase through regular channels to ensure after-sales support.