General
The outdoor ring main unit is the transfer station that the cable conveyed the electric energy, and is used in outdoor with the cable circuit to connect and breakout, branch and continues or changes. It features simple connection method, convenience, flexible, full insulation and omniseal structure, waterproof, corrosion resistance, antipollution, maintenance free and safety.
DFT6-12/24 series outdoor ring main unit is the new power supply equipment that we design for coordinating 10kV/24kV power network cable system. It is suitable at the cable node place in 10 kV/24kV system, and what it is as the electric energy accepts and distributing. This series outdoor ring main unit has unique structure and beautiful appearance, it especially is suitable widely at the place that small build-up area and higher requirement in environment such as city street, residence area, high-rise, airport and wharf, etc.
 
 
 
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 FS6 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