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24kv High Voltage Circuit Breaker , Ac Circuit Breaker Vacuum Are - Extinguishing Chamber
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Brand Name:Tianan Electric
Model Number:VT19-24
Certification:GB1984、GB/T11022、DL/T403 and IEC62271
Price:Pending
Payment Terms:L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability:2000PCS/year
Delivery Time:35 work days
Company Data
Verified Supplier
Contact Person
Lian Huanhuan
Business Type:
Manufacturer Exporter Trading Company Seller
Officials:
3/F, Building B7 , 999 Yangfan Road,High-tech Zone, Ningbo, China 315040
Quality:
Quality Certifitation Available
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Product Details
Company Profile
Product Details
24kv Vacuum Are - extinguishing Chamber High Voltage AC Vacuum Circuit Breaker
NINGBO TIANAN (GROUP) CO., LTD.
Overview
VT19-24indoor HV vacuum circuit breaker is used in three-phase AC electric system of 50HZ,24kV. It is used as control and protection department in the mining company ,power factory and substation. Because of its special advantages, it is also suitable for the site which frequently operation under rated current or multiple breaking short-circuit current.
The circuit breaker is identified by some national standards and international relative standards, such as GB1984,GB/T11022,DL/T403 and IEC62271, etc. It has reliable lockage, used as truck department or fixed installation department.
The structure of vacuum arc-extinguish room
Vacuum arc-extinguish room is the core parts of circuit breaker to bear,make and break current energy. It has sufficient arc-extinguish function and high operation duration.
- Insulation enclosure (1) of arc-extinguish room is made up of high intensity alumina ceramics material, both ends shall be welded stainless steel cover (6) and it will be formed into sealed cavity.
- Inner layer of arc-extinguish room is metal shied cover(5) which metal moist caused by arc can be compounded or condensed on the metal shied cover in short time during terminal making & breaking, insulation media intensity of inner arc-extinguish room will be recover. Meantime, shied cover can protect ceramics enclosure from hurt of metal splashing.
- Retracted stainless steel accordion pipe (4) is the important part of arc-extinguish room that moving terminal (3) can move in the fully-closed arc-extinguish room. Sealing function and long duration of accordion pipe is one of the main factors which decided the mechanical duration of vacuum arc-extinguish room.
- Terminal is the heart of vacuum arc-extinguish room, adopt chromium-copper, advanced smelt technology can ensure the breaking function and electric duration of vacuum circuit breaker, and decrease the operation over-voltage level.
The main parameter of 24KV circuit breaker
| Rated voltage | 24kV | ||
| Rated frequency | 50Hz | ||
| Rated lighting impulse withstand voltage | 125kV | ||
| Rated 1 min power frequency withstand voltage | 65kV | ||
| Rated operation sequence | O-0.3s-CO-180s-CO | ||
| Rated current (A) | 630,1250 | 1250,1600,2000,2500 | |
| Rated short circuit breaking current (r.m.s, kA) | 20/25 | 31.5 | |
| Rated short circuit making current (peak value, kA) | 50/63 | 80 | |
| Rated short time withstand current/short circuit continuous time (kA/s) | 20,25/4 | 31.5/4 | |
| Rated peak value withstand current (kA) | 50/63 | 80 | |
| Breaking times of rated short circuit(times) | 30 | ||
| Mechanical duration (times0 | 20000 | ||
| Weight (kg) | Fixed type | ≤250 | |
| Truck type | ≤350 | ||
| Name | Unit | Data | |
| Distance of contact terminal | mm | 12±1 | |
| Over-travel | 4±1 | ||
| Three-phase opening & closing asynchronous | ms | ≤2 | |
| Tripping time of closing contact terminal | ms | ≤2 | |
| Closing & opening time | Opening | ms | ≤50 |
| Closing | ≤70 | ||
| Average opening speed(after opening 6mm) | m/s | 1.4±0.3 | |
| Average closing speed(after closing 6mm) | 0.8±0.2 | ||
Company Profile
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,
- H. V. Load switch, fuse, current transformer (CT),
- 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.
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