Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co.,Ltd
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Ac Metal-enclosed Outdoor Cable branch box , Connection distribution cabinet
Overview
DFT6-12/24 series as the electric energy accepts and distributing. The outdoor ring main unit is the transfer station that the cable conveyed the electric energy, used in outdoor with the cable circuit to connect and breakout, branch and continues or changes. It features of simple connection method, convenience, flexible, full insulation and omniseal structure, waterproof, corrosion resistance,antipollution, maintenance free and safety.
Service condition
A. Altitude ≤1000m (above sea level);
B. Ambient temperature: -25ºC~+40ºC;
C. Wind speed ≤34m/s
D. The spot should have no regularly exquisite shake.
Main technical data
Main parameter of FN26-12/24 SF6 load switch
| Item | Unit | Parameter | Parameter |
| Rated voltage | kV | 12 | 24 |
| Rated current | A | 630 | 630 |
| Rated short time withstand current | kA/s | 25/2 | 25/2 |
| Rated peak withstand current | kA | 63 | 63 |
| Rated short circuit making current | kA/times | 50/2 | 63/2 |
| 1 min power frequency withstand voltage | kV | 42 | 65 |
| Lightning impulse withstand voltage | kV | 75 | 125 |
| Mechanical life | Times | 10000 | 10000 |
| SF6 gas pressure(surface pressure in 20ºC) | Mpa | 0.04 | 0.04 |
| Yearly gas leakage rate | ≤1% | ≤1% |
Main technical parameter of cable connector
| Item | Unit | Parameter | Parameter |
| Rated voltage | kV | 12 | 24 |
| Rated current | A | 630 and below | 630 and below |
| Cross section of cable | mm2 | 25~400 | 35~400 |
| Resistance in connection point | μΩ | 40 | 45 |
| Partial discharge | pC/kV | ≤10/13 | ≤10/21.5 |
| Rated short time withstand current | kA/s | 20/3 | 25/2 |
| Rated peak withstand current | kA | 50 | 63 |
| 1 min power frequency withstand voltage | kV | 42 | 65 |
| Lightning impulse withstand voltage | kV | 75 | 125 |