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RDFW series high voltage cable branch box
The RDFW series cable branch box is an outdoor high-voltage electrical device with a rated voltage of 12KV/50HZ and a rated current of 630A, used for connections and branching in power, cable, and urban power supply systems. This product features a high safety factor, diversified combinations, and a wide range of applications, meeting user design requirements and providing satisfactory technical solutions.
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Product Description
Overview
The RDFW series cable branch box is an outdoor high-voltage electrical device with a rated voltage of 12KV/50HZ and a rated current of 630A, used for connections and branching in power, cable, and urban power supply systems. This product features a high safety factor, diversified combinations, and a wide range of applications, meeting user design requirements and providing satisfactory technical solutions.
Structural Features
The RDFW series branch box uses high-performance load switches insulated with SF6 gas and contact-shielded silicone rubber cable joints, which have strong active no-load load and no-load cable current breaking capacity and short-circuit current closing capacity. It can be equipped with corresponding lightning arresters and ground fault indicators according to user requirements. Each ring network line in this series is equipped with a load switch or vacuum circuit breaker. Any branch circuit can be freely disconnected and reconnected without affecting other ring network circuits. Fuses can also be attached to the load switch; when a short circuit occurs in a branch circuit, the fuse quickly disconnects the fault circuit and triggers the load switch's tripping mechanism to isolate the fault circuit, ensuring the continuity of power supply to the branch circuit.
Environmental Conditions
· Altitude: 2000m
· Surrounding air temperature: upper limit +55℃, lower limit -45℃
· Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%
· Surrounding air free from corrosive or flammable gases, water vapor, or significant pollution
· No frequent severe vibrations, earthquake intensity not exceeding 8 degrees
Main Technical Parameters
| Item | Parameter |
| Rated Voltage (KV) | 12 |
| Rated Current (A) | 630 |
| Rated Short-Time Withstand Current (KA/3S) | 20 |
| Rated Peak Withstand Current (KA) | 50 |
| Power Frequency Withstand Voltage (KV/1min) | 42 (effective value) |
| Lightning Impulse Withstand Voltage (KV) | 75 |
| Partial Discharge | PC <10 |
| Rated Cable Charging Breaking Current (A) | 10 |
| Rated Closed Loop Breaking Current (A) | 630 |
| Mechanical Life (times) | 5000/2000 |
| SF6 Gas Pressure (Bar) | 0.45 |
| Shell Protection Level | IP33 |
| Gas Leakage Rate (%/year) | <0.1 |
| Maximum Cable Cross-Section Area (mm) | 240 |
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