Description

30kV 33kV 34.5kV 36kV 40.5kV class SF6 gas ring main unit

RMR Type Full Gas Insulated RMU - Beierbian Group Brand

General

RMR-36/40.5kV is completely insulated SF6 Gas insulated Switchgear, normal we call it Ring Main Unit(RMU).

it is used for secondary distrubition electricity grid switching,Protection and control.

The RMR type sf6 ring main unit is complied with the standards the GB/IEC standard IEC62271-200.

The RMR type ring main units can be divided into three kinds of unit cabinet：

- 3 position cable connection unit (Cable switch unit), additional live shows and configuration of surge arresters and grounding fault component. Code C
- 3 position switch and fuse tripping system and earthing switch interlock system fuse combined electrical unit (Fuse combination unit), additional live shows and configuration of surge arresters and grounding fault component. Code F
- 3 position switch and vacuum circuit breaker combined appliances unit (Vacuum circuit breaker unit), additional current transformer, live shows and configuration of surge arresters and grounding fault component. Code V

The combination of the current transformer and the microcomputer protection to constitute the basic circuit protection function.

Microcomputer protection using passive protection and CT electric no need of additional PT power supply Reference standard：

IEC62271-200

IEC62271-100

GB3804-2004

GB3906-1991

GB16926-1997

GB/T11022-1999

Remark：

Fuse combined electrical follow IEC 60420

VCB unit according to IEC 62271-100/GB1984-2003

Service environment

a) Air temperature: ±40℃; Daily average ≤25°C

b)Altitude above sea level: Maximum installation altitude: 4000m

c)Wind: less than 35m

d)Earthquake intensity: no more than 8 degrees;

More details pls consult with us!

Technical data of 30kV 33kV 36kV 40.5kV SF6 gas insulated ring main unit

No	Item		Unit	Data
1	Rated voltage		kV	24/36
2	Power Frequency withstand voltage	Dry		60/70/80/95
		Wet
	Lightning Impulse withstand Voltage (peak value)			125/150/170/185/200
3	Rated Current		A	630/1250/2500
4	Rated short circuit breaking current (peak)		kA	20/25(V) 31.5(F)
5	Rated closed-loop breaking current		A	630/1250(C)
6	Rated cable charging interrupting current		A	50(C)
7	Rated line cable charging interrupting current		A	10(C)
8	Rated off circuit transformer breaking current		A	16
9	Rated making current (peak)		kA	50(63/80)/2.5(main switch/grounding)
10	Rated withstand current (peak)
11	Rated short time withstand current			16/20/25/31.5
12	Rated short time withstand time		S	3/4
13	Mechanical life		times	C/F(2000)V(10,000)
14	Main busbar		A	630/1250/2000/2500