Basic Info.
Product Description
VB4 medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 12~24kV and frequency 50/60Hz,widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment, especially, It is used for the occasion that needs infrequent operation at rated current or multi-breaking short circuit current, may be mounted in the indoor air insulating switchgear like type KYN28 or AMS, ABB type ZS1 series, etc. This circuit breaker is standards as GB1984-2003 AC high voltage circuit breaker, JB3855 3.6-40.5Kv indoor AC High voltage circuit breaker, DL/T403 Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker for order as well as IEC60694.This circuit breaker is made with mature APG technology. The application of VB4 terminal buffer guarantees the indoor terminal is ever more reliable in nay operation environment. VB4 can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries.
Service environment
a) Air temperature: Maximum temperature: +40ºC; Minimum temperature:-25ºC
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
Detail
The circuit-breaker VB4-12(24) is the newest equipment in the voltage class of 12kV up to 24kV manufactured by Zhejiang Farady Electric Co., Ltd. It is universal used in power distributing and transforming systems of power stations, power generators, and secondary substations of mines, industries and infrastructures.
The circuit-breaker VB4-12(24) has complete type specifications:
the rated voltage is 12kV, the rated current is up to 4000A and the rated short circuit breaking current is up to 50kA.
The circuit-breaker VB4-12(24) is equipped with modularized spring operating mechanism which has characteristic of more convenient maintenance, rapider replacing of parts and more reliable performance.
The circuit-breaker VB4-12(24) adopts embedded poles that the vacuum interrupter with low resistance and the primary main electrical circuit are cast in insulating cylinders by epoxy resin.
This structure makes the breaker have more reliable insulation.
The embedded poles of circuit-breaker VB4-12(24) have the technique of ventilation and convection. Besides, the vacuum interrupter is with low resistance. All of these reduce the power consumption and the temperature rising due to the longtime running of circuit-breaker.
The circuit-breaker VB4-12(24) has perfect performance when it is breaking short-circuit current or being operated frequently.
Beside that it also has the functions of automatic reclosing and reliable operating.
The driving mechanisms of circuit-breaker VB4-12(24) are designed by professionals in CooperNature and with characteristic of reliable closing performance, low impact force and longer lifetime. The mechanical lifetime can be up to 30000 cycles.
performance is ensured. The circuit-breaker is also applicable to humid and hot regions.
The circuit-breaker VB4-12(24) has been through the whole type test in accordance with the standards of GB and IEC.
1.Electrical control
The modular control circuit board adopts the connection plug with the self-fastening function, which can ensure the reliability of the electrical connection. It also has the function of trip-proof and monitoring.
Tripping and closing coils adopt fully sealed structure to reach strong humidity resistance. The metal shell can ensure the good electromagnetic shielding.
Magnetic blow-out micro-switch is adopted to ensure the accurate signal indication
2.Closing system
Special steel tension spring can ensure the persistence and steady of the mechanical property. Self-lubrication beating is adopted to ensure the mechanical life can reach more than 50000 times. The cam shape is optimized through rigorous engineering to ensure the excellent output performance.
3.Energy storage system
High quality motor can ensure that the continuous operating life is up to 100,000 hours or more.
The gear transmission structure can avoid the risk of fracture.
4.Holding structure
The integral design of closing holding and separating brake release can ensure that the structure is simple and reliable, which can stop the fault of opening and closing.
The latch is casted with high performance steel and matched with accurate heat treatment process to ensure its long life.
5.Surface treatment
More than 90% of the component adopt the electro less nickel-phosphorus plating process and the standard items are taken stainless steel to enhance the corrosion resistance, the salt spray test exceed 500 hours.
6.Breaking brake buffer
Special cushioning mechanism design can buff the impact of the opening operation effectively.
Accurate damping control can ensure the perfect performance of the opening operation.
The aircraft hydraulic oils have excellent low- temperature viscosity which can ensure the reliable operation of the circuit breaker.
Embedded Pole
High Reliability
Compared with the traditional assembled pole, the number of parts, conductor connection surface connecting fasteners used for the Embedded Pole can be reduced by a big margin so as to simplify the assembly procedure of the main circuit, lower the circuit resistance and enhance the reliability of the main circuit connection.
Stable Insulating Property
After the vacuum interrupter is embedded in the solid epoxy resin material, the external environment of the pole can make the lowest effect on the vacuum interrupter. With the external insulating capacity, the pole can not be affected by dust, humidity, small animals, condensation and pollutions. It can completely meet the creepage distance requirement of the II-grade polluted region specified in the GB/DL Standard.
Firm Structure
Provide the sufficient protection for the vacuum interrupter so that it can not suffer the accidental mechanical collision in the process of assembling or transportation.
Miniaturization
Adopt the epoxy resin as the insulation medium to reduce the phase distance and decrease the volume of the vacuum circuit breaker & its matching switch cabinet.
Free Maintenance
As the whole pole is poured into the integral component, the vacuum interrupter can get the sufficient protection. The free maintenance of the vacuum interrupter can provide the condition for the free maintenance of the circuit breaker.
More Environmental Protection
The circuit breaker with the Embedded Pole can substitute for the SF6 gas as the external insulation to some extent, with more environmental protection.
Technical data
Certification
Packing and Deliver
About Us
Founded in 1996, with a registered capital of 10 million USD, Zhejiang Farady Electric enjoys about 20 years' experience in MV transmission and distribution electrical equipment manufacture.
We are National Hi-tech enterprise, National Spark plan Program,State Hi-tech enterprise, State Innovation R&D center, Patent demonstrate company.
Farady is located in Liushi of Yueqing, Zhejiang,China,main products include: Transformer/RMU/switchgear/AVR/ACR and MV indoor and outdoor switch. All the products of ours have passed the national and international laboratory type test, Farady Electric was qualified supplier of China State Grid and China southern Grid.
With ISO9001/14001/18001, we are strike for create value for our partner and customer.
There is more than 20 distributors and agents worldwide already trust us and distribute Farady product there, we are not only export product, but also provide whole technology solution to help partner to establish local factory in our business line.
Today, boasting the value of products specialization, brand management, and business globalization, with the sprits of pragmatism, innovation, efficiency, and responsibility, Farady Company is dedicated to become the top name in the international business from china, and contributes its share to the transformation from the Made in China into the Invented in China.
Zhejiang Farady Powertech Co.,Ltd
TEL:0086-0577-61512688
Fax:0086-0577-61510628
Http:// faradypowertech.en.made-in-china.com
Add: N.O.278,Wei 7 Rd,Yueqing Economic development Zone,Liushi,Yueqing,Zhejiang,P.R.China, 325600