High Voltage Fixed SF6 Ring Main Unit(RMU) BRSM6-12/24/40.5KV

BRSM6 series SF6 ring main unit, load break switch cabinet is a new generation of switching equipment based on SF6 load switch. It is widely used in 7.2~40.5kV electric power distribution system ,The products are widely used in the power supply loop or double radiation power supply system for its excellent performance and compact design and extension design concept for the purpose of making and breaking load current and overload current, can also be used for making and breaking no-load long line, no-load transformer and the capacitor etc.. The switch device adopts high performance load break switch and current limiting fuse combination ,which can replace the circuit breaker , that is, load break switch bears making and breaking kinds of load current, and limiting fuse bears greater breaking of overload current and short-circuit current .

BRSM6 series SF6 ring main unit is SF6 switch as the main switch and the entire unit adopts air insulated, suitable for power distribution automation, both compact and expandable metal enclosed switchgear, which has the characteristics of simple structure, flexible operation, convenient installation, reliable interlock etc, providing satisfactory solutions both a variety of application occasions and different user requirements. The adopting of sensor technology and the latest protection relays, coupled with advanced technical performance and easy and flexible assembly solutions,which can fully meet the changing needs of the market. The main switch XGN  unit type SF6 ring main unit separately adopts FLN36D type or ABB produced SFG type SF6 load break switch; it can also be assembled according to the needs of users with the highest technical level of contemporary international U BP series vacuum circuit breaker or ABB produced HD4 type SF6 circuit breaker or equipped with the our company production of VS1-12 type vacuum circuit breaker . There are two kinds of operation modes of the main switch in the ring main unit: manual and electric. Attaching with FTU, RTU ,which can meet the requirements of “four remote”. The switchgear meet the requirements of standard IEC62271-200,IEC62271-100 etc.

No.	Item		Unit	Parameter
1	Maximum system voltage		kV	12	15	24	40.5
1	Rated voltage		kV	7.2、11	13.8、15	17.5、20、22	30、33、36
2	Rated current		A	630/1250
3	Rated frequency		Hz	50/60
4	1min Power frequency withstand voltage	Phase to phase, phase to earth	kV	42	48	55	85
		Fracture	kV	48	55	65	95
5	Lightning impulse withstand voltage	Phase to phase, phase to earth	kV	75	90	125/150	170
		Fracture	kV	85	105	150/160	185
6	Short time withstand current	Main circuit	kA	25/2s
		Earthing circuit	kA	25/2s
7	Rated withstand current (peak)		kA	63			50
8	Rated transferring current		A	1300-1700
9	Rated load circuit making current		A	630
10	Rated cable(line) charging breaking current		A	50/10
11	No load transformer breaking current		A	20
12	Cable charge breaking current in earthing fault		A	100			80
13	Rated short circuit breaking current (peak)		kA	20
14	Rated short circuit making current (peak)		kA	63			50
15	Protection level			IP4X
16	Load break switch life		times	5000
17	Earthing switch life		times	5000