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DFW Switched Cable Branch Box - Reliable Solutions from China Suppliers and Factory for Power Distribution
Model and Definitions
DFW Technical Parameters
| No. | Items | Parameters |
|---|---|---|
| 1 | Nominal Voltage | 12kV |
| 2 | Rated Currency | 630A |
| 3 | Power Frequency Withstand Voltage (Phase to Ground) | 42kV/min |
| 4 | Lightning lmpulse Voltage | 75kV |
| 5 | Rated Breaking Current | 630A |
| 6 | Rated Short-circuit Making Current(Peak Value) | 50kA |
| 7 | Rated Short-time Withstand Current | 25kA/4S |
| 8 | Rated Peak Withstand Current | 50kA |
| 9 | Rated Peak Withstand Current | 45A |
| 10 | Rated Breaking Capacitive Current | 16A |
| 11 | Full Load Breaking Time | >100 |
| 12 | Mechanical Operation Time for Opening and Closing | 2000 |
External Schematic Diagram
Basic Structure
Technical Requirements
The inner side of the brick wall is to be sealed with a 1:3 cement mortar mix and treated for waterproofing.
Beam penetrations should use φ6 concrete operations.
The foundation channel steel must undergo anti-corrosion treatment after fabrication.
After the installation of the branch box is completed, the area around the base should be sealed with cement.
Waterproof measures must be taken at the manhole entrance.
Grounding electrodes should be pre-embedded in the foundation, with grounding resistance meeting the requirements set by the power department.
Ordering Instructions
The product model and any special requirements from the user can provide a one-time diagram.
The standard cross-sections for incoming and outgoing lines and branch cables.
The quantity of optional surge protectors and short-circuit fault indicators.
Frequently Asked Questions (FAQ)
Q1: What is the nominal voltage and rated current of the DFW switchgear?
A: The DFW switchgear is designed with a nominal voltage of 12kV and a rated current of 630A, making it suitable for standard medium-voltage power distribution networks.
Q2: What waterproofing and sealing standards must be followed during installation?
A: The inner side of the foundation brick wall must be sealed with a 1:3 cement mortar mix and treated for waterproofing. Additionally, waterproof measures are mandatory at the manhole entrance, and the base area must be sealed with cement after installation.
Q3: How should the foundation channel steel be treated for installation?
A: The foundation channel steel must undergo a dedicated anti-corrosion treatment after fabrication to ensure long-term structural integrity and prevent rust degradation.
Q4: Are there grounding requirements for the DFW branch box foundation?
A: Yes, grounding electrodes must be pre-embedded in the foundation. The resulting grounding resistance must strictly comply with the standard requirements set by your local power department.
Q5: What options can be customized when ordering the DFW cable branch box?
A: When placing an order, you can specify standard cross-sections for incoming/outgoing lines, unique diagram requirements, and the quantity of optional components such as surge protectors and short-circuit fault indicators.