
Transformer Arc Extinguishing Current Limiting Fuse For Power Distribution PRW11-12/3-100 Type
PRW10-12F/100 on-load drop-out fuse (hereinafter referred to as
fuse) is suitable for power distribution line and power
distribution transformer of AC 50Hz, rated voltage 10kV. It is used
as overload and short circuit protection and opening and closing
load current.
Fuse is composed with underframe, arc suppression device and arc
extinguish device. When the fuse is in the closing position,
dynamic and static contact is compressed by a compressed spring, to
ensure that there is sufficient pressure between the contacts, on
the lower end of arc extinguishing pipe arranged the rotatable
torsion spring, after putting into the fuse elements, torsion
spring is tightening, the fuse in a state of tension, to ensure the
arc extinguishing pipe locking in the closing position. When the
line is overload or short circuit and fusing, fuse wire with
torsion spring, pulled out rapidly from the melting tube, and the
thermal energy of the arc produced large arc gas in the melting
tube, arc extinguish, to reduce the burning arc time and arc
material loss.
When the arc is extinguished, the fuse tube will automatically
dropped under the action of self weight and bridge type contact
spring, making a fracture. The arc extinguishing pipe is designed
into a step by step exhaust type. When breaking small current, gas
is discharged from the lower end of the exhaust port. When breaking
large current, gas rushed to open the upper cap, gas extinguished
by upper and the lower ends of the exhaust port to meet the
requirements of breaking different current on the same fuse.
Rated voltage kV | Rated current A | Rated breaking capacity MVA | Opening/closing times of load current | Weight kg Silicone rubber can be reduced 2kg | |
Lower limit | Upper limit | ||||
12 | 200 | 40 | 200 | ≥15 | 7.8 |
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.