DFW2-12/630 Cable Branch Box is equipment for connecting and branching medium-voltage cables. Distinguish the cable-connection arrangement from switch-equipped options when reviewing the component ratings and protection requirements.
DFW2-12/630 Cable Branch Box Specifications
Series Electrical Data
| Parameter | Specification / configuration |
|---|---|
| Rated voltage | 12 kV |
| Rated current | 630 A |
| Installation | Outdoor cable distribution |
| Cable connection | Insulated, screened cable interfaces; arrangement selected for the circuit |
Configuration with SF6 Load Switch
| Parameter | Specification / configuration |
|---|---|
| Rated short-time withstand current | 20 kA for 3 s |
| Rated peak withstand current | 50 kA |
| Power-frequency withstand voltage | 42 kV for 1 min |
| Secondary-circuit power-frequency withstand voltage | 2 kV for 1 min |
| Cable-charging breaking current | 10 A |
| Closed-loop breaking current | 630 A |
| Mechanical operating life | 2000 operations |
| Enclosure protection | IP43 for the documented configuration |
Service Conditions
| Parameter | Specification / configuration |
|---|---|
| Altitude | Up to 2000 m |
| Daily mean relative humidity | Up to 95% |
| Monthly mean relative humidity | Up to 90% |
| Site conditions | No persistent severe vibration or corrosive exposure |
Ratings and options apply to the selected configuration. The agreed drawings and equipment schedule define the supplied assembly.
Cable connection and switching arrangements
A conventional cable branch box connects incoming and outgoing cables through insulated interfaces. A switch-equipped arrangement adds circuit switching and may include fuse or circuit-breaker protection, depending on the selected scheme. The load-switch ratings above apply to the documented switched arrangement and should not be read as a rating for every cable connector or optional protective device.
Planning the outdoor installation
Define the available footprint, cable entry direction, cable size and termination system before selecting the enclosure. Access for operation, earthing, maintenance and safe isolation should be coordinated with the wider network. Surge arresters and fault indication can be considered where required by the electrical scheme.
Information for Selection
- System voltage and single-line diagram
- Incoming/outgoing branch count and cable sizes
- Conventional or switched arrangement and protection requirements
- Site exposure, cable entry and access requirements
Explore the application solutions for your industry and include the project specification with your enquiry.
Related voltage and acceptance questions
Distinguish the network’s nominal voltage from the selected equipment rating using the 10 kV versus 12 kV guide. State whether the enquiry is for cable branching only or a switch-equipped arrangement so that the relevant component and protection ratings can be reviewed.
Agree the factory inspection and document scope for the actual arrangement. The medium-voltage catalogue helps compare other circuit functions, while the enquiry checklist lists the project data to supply.