DFW-12 Outdoor High Voltage Cable Distribution Box
Product Overview
The DFW-12 outdoor high-voltage cable branch box is an advanced,
fully insulated, and sealed power distribution solution engineered
specifically for power cable connection and tap configurations.
This equipment integrates sulfur hexafluoride (SF6) load switches
or vacuum circuit breakers as control links, paired with touch-safe
shielded silicone rubber cable connectors that provide a strong
active load and no-load breaking capability, along with
short-circuit isolation. To maximize system integrity, it can be
seamlessly outfitted with lightning arresters and ground fault
indicators based on site requirements.
When short-circuit anomalies occur on a branch circuit, fast-acting
fuses or the circuit breaker's disconnecting mechanism quickly
isolate the fault line, allowing the rest of the ring network to
remain fully energized. Widely specified for 10kV power grid taps,
urban road reconstruction, residential quarters, industrial
commercial zones, mining facilities, and railways, this
flood-resistant kiosk delivers an exceptionally flexible, safe, and
reliable solution that drastically minimizes capital investments
while boosting grid supply continuity.
Key Features & Advantages
- Premium SF6 & Vacuum Switching Units: Incorporates high-end sulfur hexafluoride load switches or vacuum
circuit breakers to handle intense active load routing and safe
fault-current separation.
- Touch-Safe Shielded Connections: Uses fully insulated, touchable shielded silicone rubber cable
connectors that provide excellent moisture, flood, and
environmental degradation resistance.
- Selective Branch Fault Isolation: Built-in fuses and protective lockouts swiftly strike down
malfunctioning branch circuits without affecting parallel healthy
lines, keeping downstream users live.
- Flexible Smart Grid Expansion: Features an adaptable modular footprint that easily accommodates
smart telemetry ground fault indicators and lightning arresters for
long-term maintenance-free operation.
Model Nomenclature
- DFW: Outdoor Cable Tap Box Architectural Series
- [ ] / [ ]: Incoming and Outgoing Circuit Quantities
- K: Programme Code of Switching Type (Default means common type
without switch link)
- 630: Rated Current Rating parameter (630A)
- 12: Rated System Voltage Level (12kV)
- [ ]: Specific Programme Scheme Identification Number
Environmental Operating Conditions
- Altitude Tolerances: Certified for full-capacity distribution performance at altitudes
up to 1000m above sea level.
- Ambient Air Temperature Limits: Rated to operate safely within an outdoor atmospheric temperature
range from -30°C up to +40°C.
- Relative Humidity Thresholds: Daily average relative humidity must remain at or below 95%, and
monthly average relative humidity must not cross 90%.
- Seismic and Site Safety: Validated to withstand seismic shaking intensities up to 8
degrees; the installation site must be clear of violent vibrations,
open flames, or hazardous chemical explosive dust clouds.
Main Technical Parameters
| Technical Parameter Name | Unit | Design Parameter Data |
|---|
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 |
| Rated Short-Time Withstand Current | kA/3s | 20 |
| Rated Peak Withstand Current | kA | 50 |
| Frequency Withstand Voltage (RMS) | kV/1min | 42 |
| Lightning Impulse Withstand Voltage | kV | 75 |
| Secondary Circuit Frequency Withstand Voltage | kV/1min | 2 |
| Negative Polarity DC Withstand Voltage | kV/15min | 52 |
| Partial Discharge | pC | < 10 |
| Rated Current Breaking Number / Mechanical Life | Times | 100 / 5000/2000 |
| Rated Current Charging / Closed-Loop Breaking Current | A | 10 / 630 |
| Shell Protection Grade | — | IP33 |
| SF6 Gas Pressure / SF6 Gas Leakage Rate | Bar / % per annum | 0.45 / < 0.1 |
| Maximum Cross-Sectional Area of Cable | mm² | 300 |
Why Choose JNCN Power DFW-12 Cable Distribution Box
Modern 10kV urban power distribution networks require premium
flood-proof security, robust switch gear reliability, and targeted
fault mitigation. JNCN Power delivers an elite industry response
built on the following advantages:
- Advanced SF6 Interrupter Integration: Our branch boxes utilize premium 0.45 Bar hermetically sealed SF6
load breakers, maintaining an incredibly low leakage rate of <
0.1% per year to handle full 630A loop breaking safely.
- True All-Weather Flood-Resistant Defense: Outfitted with an IP33 robust weatherproof shell and high-grade
touch-safe shielded silicone rubber cable nodes, our boxes resist
heavy water pooling and high-moisture creepage tracking.
- Smart Autonomous Grid Fail-Safe: When a local short-circuit hits a cable tap, our selective
fuse/breaker loops isolate the bad branch in milliseconds,
preventing multi-district power outages.
- Excellent High-Voltage Dielectric Buffers: Validated to endure a 75kV lightning impulse spike and 42kV
power-frequency stresses, this enclosure protects downstream
operations against severe grid surges.
