Customized Control Box with Electric Meter
Solution for Customized Control Box with Electric Meter**
Combining industrial standards and intelligent technologies, the following is a complete technical solution for the customized control box with an electric meter, covering core functions, model selection and configuration, implementation processes, and typical application scenarios:
I. Core Functions and Technical Parameters
1. **Electric Energy Metering and Control**
- **Type of Electric Meter**: Supports single-phase/three-phase electronic energy meters (such as the CHINT DTSY666 series), with an accuracy class of 0.5S/1.0. It supports prepayment, time-of-use billing, and RS485 communication (Modbus/DLMS protocol).
- **Control Functions**: Integrates circuit breakers (such as the CHINT NXB series), contactors (the CJX2 series), and relays (DGK-04PF) to achieve overload, short-circuit, undervoltage protection, and remote opening and closing.
2. **Intelligent Monitoring and Communication**
- **Data Collection**: Monitors voltage, current, power factor, and electricity consumption in real-time, and supports 4G/NB-IoT wireless transmission or RS485 wired communication.
- **Remote Control**: Achieves remote meter reading, parameter setting, and fault alarm through the cloud platform (such as the CHINT Energy Management System).
3. **Structural Design and Protection**
- **Material Selection**:
- **Industrial Grade**: 304 stainless steel (IP65 protection, resistant to salt spray corrosion) or hot-dip galvanized sheet (IP54 protection, with a lower cost).
- **Explosion-proof Type**: Die-cast aluminum alloy (ExdIIBT4 explosion-proof grade), suitable for hazardous environments such as oil and gas and chemical industries.
- **Modular Layout**:
- **Metering Area**: Independent electric meter installation positions, supporting multi-meter position expansion (such as the XK series plastic electric meter boxes).
- **Control Area**: Circuit breakers, contactors, and relays are fixed in layers, supporting rail installation.
- **Wiring Area**: Connected by copper busbars, supporting the connection of wires above 16mm².
4. **Electrical Parameters**
- **Rated Voltage**: AC 220V/380V (±10%).
- **Rated Current**: 63A~630A (customizable).
- **Short-circuit Breaking Capacity**: 50kA~100kA (needs to match the load requirements).
II. Typical Application Scenarios
1. **Industrial Automation**
- **Motor Control**: Monitors the voltage/current of three-phase motors and联动 the contactors to achieve start-stop control (such as the front-end protection of frequency converters).
- **Equipment Cluster Management**: Networks through the Modbus protocol to centrally monitor the energy consumption of multiple pieces of equipment (such as a group of photovoltaic inverters).
2. **Commercial Buildings**
- **Sub-metering for Households**: Supports independent billing for multiple tenants and integrates the prepayment function (such as the CHINT DDZY666 series).
- **Intelligent Lighting**: Automatically adjusts the lighting load according to the time period to reduce energy consumption.
3. **New Energy Field**
- **Photovoltaic Power Stations**: Monitors the output voltage/current of the combiner box and联动 the circuit breaker to achieve overvoltage protection (such as the DCLL23-ZTY666 photovoltaic interface).
- **Charging Pile Management**: Measures the charging power, supports QR code payment, and load balancing.
4. **Special Environments**
- **Explosion-proof Scenarios**: BXK series aluminum alloy explosion-proof control boxes (ExdIICT4), suitable for gas stations and chemical plants.
- **Outdoor Waterproofing**: 304 stainless steel enclosures (IP65 protection), with an internal temperature and humidity controller to prevent condensation.
III. Model Selection, Configuration, and Supporting Solutions
| Component | Recommended Model | Function Description |
| Electric Meter | CHINT DTSY666 (Three-phase Prepayment) | Supports RS485 communication, with an LCD display and a prepayment function (needs to be used with a power sales system). |
| Circuit Breaker | CHINT NXB-63 (63A) | High breaking capacity, supports overload/short-circuit protection, and a leakage module can be optionally configured. |
| Contactor | CHINT CJX2-1810 (18A) | Controls the start and stop of the motor and has auxiliary contact expansion. |
| Relay | CHINT DGK-04PF (Voltage Control) | Monitors three-phase voltage, supports undervoltage/overvoltage protection, and the response time is ≤100ms. |
| Communication Module | 4G DTU (such as Quectel BC28) | Supports the MQTT protocol and uploads data to the cloud platform. |
| Enclosure Material | 304 Stainless Steel/Explosion-proof Aluminum Alloy (BXK Series) | Protection level IP65/ExdIIBT4, supports wall-mounted or floor-mounted installation. |
IV. Implementation Process and Delivery Standards
1. **Requirement Confirmation**
- **Technical Parameters**: Clarify the voltage level, current capacity, protection level, and communication protocol.
- **Function Customization**: Whether prepayment, remote control, power quality analysis, etc. are required.
2. **Solution Design**
- **Electrical Schematic Diagram**: Draw wiring diagrams and component layout diagrams (such as in CAD format).
- **BOM List**: List all component models, quantities, and brands (with CHINT as the main choice).
3. **Production and Manufacturing**
- **Enclosure Processing**: Laser cutting, bending, and forming, with surface powder coating or wire drawing treatment.
- **Internal Assembly**: Weld copper busbars, install components, and conduct wiring and debugging (in accordance with the GB7251.1 standard).
4. **Testing and Acceptance**
- **Function Testing**: Simulate abnormal voltage/current to verify the protection function.
- **Communication Testing**: Verify the accuracy of data transmission through the host computer software.
5. **Delivery and Service**
- **Packaging and Transportation**: Packed in wooden boxes, moisture-proof and shock-proof, and supports logistics distribution.
- **After-sales Support**: Provides a 1-year warranty and a 7×24-hour technical response.
V. Typical Cases and Reference Prices
| Scenario | Configuration | Reference Price (RMB) | Delivery Cycle |
| Industrial Motor Control | 380V Three-phase Electric Meter Box, 63A Circuit Breaker, 4G Communication Module | 2,500~4,000 yuan/unit | 7~10 days |
| Commercial Sub-metering for Households | 220V Single-phase Prepayment Electric Meter Box, 16A Circuit Breaker, RS485 Communication | 1,200~2,000 yuan/unit | 5~7 days |
| Explosion-proof Environment | Explosion-proof Aluminum Alloy Enclosure, ExdIICT4, 63A Circuit Breaker | 4,000~6,000 yuan/unit | 15~20 days |
VI. Precautions and Compliance
1. **Safety Specifications**
- **Grounding Requirements**: The metal shell of the enclosure needs to be reliably grounded, and the grounding resistance ≤4Ω.
- **Clear Identification**: Mark the rated parameters, operation instructions, and warning signs (such as "High Voltage Danger") on the panel.
2. **Environmental Adaptability**
- **Temperature Range**: -25°C~+55°C (needs to be adjusted according to the region).
- **Installation Location**: Avoid direct sunlight and humid environments, and reserve heat dissipation space.
3. **Compliance Certifications**
- **Domestic**: CCC certification, explosion-proof certification (Ex), and type approval of measuring instruments (CPA).
- **International**: CE, UL certifications (for export needs).
VII. Supplier Recommendations and Resources
1. **Authorized Dealers of CHINT**
- **Channels**: Query local dealers through the official website of CHINT (www.chint.com), or contact the customer service at 400-887-3288.
- **Advantages**: Provides the full range of CHINT products and supports customized solutions.
2. **Explosion-proof Special Suppliers**
- **Wankong Electric**: Provides BXK series explosion-proof control boxes and supports non-standard customization.
If you need further technical support or obtain a quotation, you can provide detailed requirements (such as voltage level, current capacity, communication protocol, etc.), and I will assist in connecting with suppliers or providing more specific model selection suggestions.
