DFW type cable distribution box is a kind of outdoor high-voltage electrical equipment of that rated voltage is 12/24 / 35kV, rated current is 630A , for the connection and cut of power cable.
Structure features
This products adopts "high-performance hexafluoride load switch with SF6 insulation gas inside" and "shielded silicon rubber cables separable connector", with strong drop-out ability of active load and no-load cable current and strong closing ability of short-circuit current, what's more, we can install lightning arrester and ground fault indicator according to users' request.
Each ring connecting lines of this series of products are equipped with vacuum load switchgear or circuit breaker, any branch circuit is free to withdraw and put into operation, and other ring circuits are not affected; can install extra fuse on load switch, when one branch circuit has short-circuit accident, the fuse in this branch circuit can break accident circuit immediately, and impact load switch's release to let it trip, isolate accident circuit, which can ensure non-accident circuits' continuous power supply.
Standards
◇ GB3804 3-36kv AC H.V. load switch
◇ GB311.1 insulation coordination of high-voltage power transmission equipment
◇ GB11033.2 basic technical requirements for less or equal to rated voltage 26 /35kV power cable accessories
◇ GB11032 AC gapless MOA
Normal operational conditions
1, Altitude: ≤ 2500m
2, Environmental temperature:-45°C ~ +40°Cthe maximum temperature ≤ 25 ℃㘰
3, The place without recurrent severe vibration or corrosion
Suitable places
This products is widely used in cable distribution of 12/24/35 kv power system. Its connection method is easy, flexible and convenient, safe and reliable; main body uses 2mm stainless steel plate which is solid and durable. Portions with power adopts fully insulating and sealed structure. Use shielded silicon rubber cables separable connector, can withstand flooding, greatly improve reliability of power supply.
Cable distribution box
Product model
Product features
● all stainless steel casing , sealed, fully insulated, no exposed live body,
● maintenance-free
● anti-immersion of flood, anti-dirty, anti-condensation and cream, corrosion-resistant. make use of external semi-conductive composite silicone rubber cable connector, ensure personal safety.
● cable connector adopts advanced "later injection the insulating layer" technology, outside layer is uniform external shielding of 2mm thick, grounding resistance is less than 1000Ω, after assembly the front and rear connectors, the center distance is only 100mm which make the size of cable distribution box be further smaller, it is the most advanced prefabricated cable connector in the world.
● small size, easy to install, outlet and inlet lines are flexible, mostly can have eight circuits.
Branch circuit and outline dimension of European cable distribution box
| Model | Program scheme | Size(L*W*H) |
| DFP-12(24/35)/630/3 |  | 700*600*900 |
| DFP-12(24/35)/630/3B |  | 700*600*900 |
| DFP-12(24/35)/630/4 |  | 700*600*900 |
| DFP-12(24/35)/630/4B |  | 900*600*900 |
| DFP-12(24/35)/630/5 |  | 900*600*900 |
| DFP-12(24/35)/630/5B |  | 900*600*900 |
| DFP-12(24/35)/630/6 |  | 900*600*900 |
| DFP-12(24/35)/630/7 |  | 1200*600*900 |
| DFP-12(24/35)/630/8 | | 1200*600*900 |
Performance parameter
| Name | Parameter | ||||
| Rated voltage | 12/24/35 kV | ||||
| Rated current | 630A | ||||
| Frequency withstand voltage | 45/50/95kV/1min | ||||
| Lightning impulse withstand voltage | 105/125/200kV | ||||
| DC withstand voltage | 52kV/15min | ||||
| Minimum corona inception voltage | 11kV | ||||
| Partial discharging | ≤10pC/13kV | ||||
| Rated thermal current | 20kA/2s | ||||
| Rated dynamic current | 50kA/0.3s | ||||
| Loop resistance | ≤40 μΩ | ||||
| Protectiive level | IP33 |
Cable distribution box with switchgear
Product features
● all stainless steel casing , sealed, fully insulated, no exposed live body,
● maintenance-free
● anti-immersion of flood, anti-dirty, anti-condensation and Cream, corrosion-resistant. make use of external semi-conductive composite silicone rubber cable connector, ensure personal safety.
● configure fixed metal enclosed SF6 load switch, all charged bodies are sealed in a SF6 gas stainless steel tank.
● Configure electric operation, remote control, RTU/FTU, etc. automatic equipments, and also has a variety of ring net power combination modes be optional.
Basic performance parameter
| No. | Name | Unit | Parameter | |||||
| 1 | Rated voltage | kV | 12/24 | |||||
| 2 | Rated current | A | 630 | |||||
| 3 | Frequency withstand voltage(line voltage, voltage to earth) | A | 45/50/1min | |||||
| 4 | Lightning impulse withastand voltafe(line voltage, vlotage to earth) | kV | 105/125 | |||||
| 5 | Partial discharging | kV | <10 | |||||
| 6 | DC withstand voltage | pC | 52/15min | |||||
| 7 | Rated thermal current (2s) | kV | 20 | |||||
| 8 | Rated dynamic current (peak vaule) | kA | 50 | |||||
| 9 | Rated drop out current | kA | 630 | |||||
| 10 | Rated closing current | A | 50 | |||||
| 11 | Full load current breaking times | kA | >100 | |||||
| 12 | Mechanical life | times | 3000 | |||||
| 13 | Protective time | times | IP33 | |||||
Product model
A wiring diagram scheme of cable distribution box with switchgear
| A wiring diagram scheme | Model | A wiring diagram scheme | Model | A wiring diagram scheme |
 | DFP-12(24)/630/1K1-2 |  | DFP-12(24)/630/1K1-3 |  |
 | DFP-12(24)/630/1K1-5 |  | DFP-12(24)/630/1K1-6 |  |
 | DFP-12(24)/630/1K2-2 |  | DFP-12(24)/630/1K2-3 |  |
 | DFP-12(24)/630/1K2-5 |  | DFP-12(24)/630/1K2-6 |  |
 | DFP-12(24)/630/2K2-2 |  | DFP-12(24)/630/2K3-2 |  |
 | DFP-12(24)/630/2K5-2 |  | DFP-12(24)/630/2K6-2 |  |
 | DFP-12(24)/630/3K2-3 |  | DFP-12(24)/630/4K2-4 |  |
