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：
Fuse combined electrical follow IEC 60420
VCB unit according to IEC 62271-100/GB1984-2003
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!
|40.5kV Full Gas Insulated RMU|
|2||Power frequency withstand voltage||Dry||60/70/80/95|
|4||Lightning impulse withstand voltage
|6||Rated short circuit breaking current(peak)||kA||20/25（V)31.5(F)|
|7||Rated closed-loop breaking current||A||630/1250(C)|
|8||Rated cable charging interrupting current||A||50(C)|
|9||Rated line cable charging interrupting current||A||10(C)|
|10||Rated off circuit transformer breaking current||A||16|
|12||Rated making current(peak)||kA||50(63/80)/2.5(main switch/grounding)|
|13||Rated withstand current(peak)|
|14||Rated short time withstand current||16/20/25/31.5|
|15||Rated short time withstand time||s||3月4日|