
33kV Indoor Rmu Ring Main Unit / C - GIS gas insulated switchgear
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.
On our nation 40.5Kv transmission line, there is still massive adoption of various fuses. For the terminal station especially,because of its low rated current and rated short-circuit current,like "waste one's talent on a pretty job" , far from economy.
Load switch or load switch and fuse composed electric apparatus are widely adopted abroad for its economy, convenience ,safety, and dependability . For our country, SF6 load switch is unavailable on 40.5kV voltage degree. The only choice is using 36kV air load switch from other country,however, its insulation level doesn't meet our nation standard,it still unsuited for the running on our nation grid.
For the above reasons,we developed XGN65-40.5 Indoor HV SF6 Ring main unit.
Technical data
S/N | Item | Unit | Parameter |
1 | Rated voltage: | kV | 36, 38, 40.5 |
2 | Rated frequency: | Hz | 50/60 |
3 | 1 min power frequency withstand voltage phase-phase,phase -earth/isolating distance : | kV | 70/80, 70/80, 95/110 |
4 | Lighting impulsive withstand voltage phase-phase,phase-earth/isolating distance: | 170/195, 170/195, 185/215 | |
5 | Rated current: | A | 630, 1250 |
6 | Rated current of fuse: | A | 3.15-50 |
7 | Rated short-time withstand current of main circuit, earth circuit : | kA | 20 |
8 | Rated short-time withstand current of main circuit, earth circuit : | kA | 20 |
9 | Rated short-circuit making current: | kA | 50 |
10 | Load switch full capacity breaking times: | times | 100 |
11 | Rated short-circuit breaking current of fuse : | kA | 31.5 |
12 | Rated transfer current: | A | 1000 |
13 | Rated SF6 gas pressure (ambient tempeture20ºC): | Mpa | 0.04 |
14 | SF6 gas min. pressure (gauge pressure at 20ºC) | Mpa | 0.02 |
15 | Gas annual leakage rate | <0.2% | |
16 | Mechanical lifetime : | times | 5000 |
17 | Protection degree of gas filled tank | IP | 67 |
18 | Protection dgree of mechanism compartment, instrument compartment and cable compartmnet | IP | 3X |
19 | Circuit resistance | ||
20 | LBS cubicle | uΩ | 130 |
21 | LBS+fuse cubicle | uΩ | 250 |
22 | Circuit breaker cubicle | uΩ | 140 |
Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales offices, and its total asset is 4.2 billion Yuan, over 3500 employees.
As an outstanding representative of Chinese-made, our enterprise is in the steady development and growth in the tide of reform and opening up.
In1976,our production mode transforms from Labour products to the manufacturing process;
ln1982,the Xiangshan local state- owned high-voltage electric factory was founded,we start the professional development of electrical apparatus ;
In1994,we reorganized and established joint- stock company, enngraver to be an international group ;
In 2005, our group ranked the No. 225 in competitiveness of China's top 500;
According to national development,we expand five major industrial, such as the high voltage apparatus, renewable energy equipment, intelligent grid and rail transit equipment,and magnetic gear in order to achieve the business strategic abjectives.
Over these years, our company stand for independent innovation and to build low-carbon economic development
model.Annual R & D expenses accounted for more than 5% of
corporate sales.We have mastered the core technology of
transformation and distribution equipment and core self-supporting
ability long since.Our self- developed prefabricated substation,
ring main unit, load switch, wind power switchgear, inelligent grid
systems and many other products achieved the international advanced
level,By the way, we are the one of the companies who draft the
national standards about that.
Tianan has the certification and honour involves China famous
brand,China top brand,National inspection- free products and
ISO9001 quality system, IS014001 environmental management system,
OHSAS 18001 occupational health and safety management system. the
inspection measurement and certification system and
"CCC","PCCC",etc.Also we equipped with business efficient and
flexible management mechanism, large number of outstanding
professionals, first-class production and testing equipment,
high-level research and development strategy, Quality is the
character" concept, perfect quality management system and quality
assurance,sales and marketing network all over the
country,which forms to provide customers with excellent
support system of resources.
The products are widely used in nuclear power plant, chemical plant, railway, underground, Airport, national defense, Beijing Olympics and main national, provincial and municipal construction projects. Whether in the Shenzhou spacecraft launching base,the Sanxia power plant, Qinghai-Tibet railway, Qingshan nuclear power station, or domestic subway, Olympic venues. International airport. wind farms and so on.Our projects applied in more than 30 countries and regions all over the world. Our main products includes
- 126kV&252kV power transformer,resin-Cast Dry-type & Oil-immersed Power transformer,Combined transformer
- 252kV and below 252kV outdoor HV disconnecting switch and transformer,
- Boxtype substation below 40.5kV,Prefabricated substation and cable (RMU)branch box
- High Voltage &Medium Voltage&Low Voltage switchgear
- Ring main unit switchgear, mid-mount switchgear, fixed switchgear, GIS switchgear,frequency conversion switchgear,
- 126kV GIS combination apparatus,
- SF6 circuit breaker,Vacuum circuit breaker ,H. V. &L. V. Circuit breaker,
- High-voltage inverter speed regulation device, high-voltage static reactive power Generator, active power filter, intelligent electric equipments, etc.
Seeing is believing, Tianan Group sincerely welcome all new and old customers and friends come to our company for a visit or inspection.