01
DFW Switched Cable Branch Box
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.