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China DFW Switched Cable Branch Box - Reliable Suppliers & Quality Factory Solutions for Safe 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)
What is the nominal voltage and rated current of the DFW cable branch box?
The DFW cable branch box features a nominal voltage of 12kV and a rated current of 630A, making it suitable for standard medium voltage power distribution systems.
What are the foundation and waterproofing requirements for installing the DFW?
The inner side of the foundation brick wall must be sealed with a 1:3 cement mortar mix and waterproofed. Additionally, waterproof measures are required at the manhole entrance, and the base area must be sealed with cement post-installation.
What is the mechanical operation life of the DFW?
The DFW is designed for high reliability, with a mechanical operation time for opening and closing rated at 2000 cycles.
What anti-corrosion and grounding specifications are required?
The foundation channel steel must undergo anti-corrosion treatment post-fabrication. Grounding electrodes must be pre-embedded in the foundation, ensuring the grounding resistance complies with local power department standards.
What information should be provided when ordering the DFW cable branch box?
When ordering, please specify the exact product model, standard cross-sections for incoming/outgoing and branch cables, and the desired quantity of optional accessories such as surge protectors and short-circuit fault indicators.