China VD4 Medium-Voltage Indoor Vacuum Circuit Breaker Factory and Suppliers - 2.5 to 34.5kV
This circuit breaker is made with mature APG technology. The application of VB4P terminal buffer guarantees the indoor terminal is ever more reliable in any operation environment. VB4P can fully meet the requirement of GB, DL, IEC, DIN, VDE as well as standards of other advanced industrial countries.
General
VB4P 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.
Service environment
a)
Air temperature: Maximum temperature: +40℃; Minimum temperature: -25℃.
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.
3D Mechanism introduction
Innovative product design
Damper with perfect performance
Thanks to the refined damper with perfect performance and the new cam gear with curvilinear design, the contacts rebounding value during the breaker opening is reduced more and the breaker can be opened reliably. Besides, the bellows in vacuum interrupter are avoided to be broken down due to contacts over bounding and also the mechanical lifetime of operating mechanism is ensured.
Special design of repair without many tools
During the design for VB4P circuit-breaker, the installation and repair must be taken into account. So for the disassembly of parts or accessories, users need no special tools and the repair becomes more convenient. Besides, all of the secondary controlling components are in front of the operating mechanism, which also make maintenance and repair convenient.
Modularized operating mechanism
Modularized operating mechanism is another feature of VB4P. It can be divided into closing module, opening module, mainaxis module and secondary wiring module, which make the mechanism have characteristic of standard manufacture method, short producing period, convenient maintenance and rapid replacing. These modules are standard and applicable to all VB4P so the costs of facilities management and maintenance are reduced.
Self-lubricative bearing without oil
Self-lubricative bearing without oil used for VB4P circuit-breaker is very applicable to over-load and low-speed conditions and avoids the lost-lubricative phenomena due to oil-lubricative bearing out of work for a long time. The free-maintenance can be realized accordingly.
Conductors with silvered surface
All the conductors of VB4P circuit-breaker are disposed by silvered process so that it do not only reduce the contacting resistance but also improve the electricity-conducting capacity of conductors. Thanks to the reduced resistance the heat from circuit-breaker running can be decreased and the breaker’s lifetime is also lengthened.
Single closing spring device
Self-lubricative Bearing without Oil
Conductors with Silvered Surface
Embeded pole design
High Reliability
Free Maintenance
Stable Insulating Property
Firm Structure
Miniaturization
More Environmental Protection
Vacuum Interrupter with Excellent Performance
1. Unique R-shaped Contact Terminal Design
2. Complete One-Time Sea-Exhaust Technology
3. High & Stable Quality Ceramic Metallization Technology
4. Stainless Steel Direct Rivet Weld Technology
Installation size
Frequently Asked Questions (FAQ)
What are the primary applications of the VB4P indoor vacuum circuit breaker?
The VB4P circuit breaker is designed for three-phase AC power systems with rated voltages up to 12~24kV (50/60Hz). It is widely used in power plants, transformer substations, petrochemical industries, metallurgy, manufacturing, airports, and residential areas to control and protect electrical equipment.
What standards does the VB4P circuit breaker comply with?
The VB4P circuit breaker fully complies with GB1984-2003, JB3855 (3.6-40.5Kv indoor AC High voltage circuit breaker), DL/T403 (Specification of 12-40.5Kv indoor High voltage vacuum circuit breaker), and IEC60694 standards, as well as standards of other advanced industrial countries like DIN and VDE.
What are the environmental limits for operating the VB4P circuit breaker?
It operates within an air temperature range of -25℃ to +40℃, monthly average humidity up to 95% (daily 90%), and a maximum installation altitude of 2500m above sea level. The air must be free of corrosive or flammable gases, and the environment should not experience frequent violent shakes.
How does the modularized operating mechanism benefit maintenance?
The operating mechanism is divided into closing, opening, mainaxis, and secondary wiring modules. This standard modular structure allows for short production periods, convenient maintenance, and rapid replacement of parts, significantly reducing management and maintenance costs.
What technologies are used in the VB4P vacuum interrupter to ensure high performance?
The vacuum interrupter utilizes a unique R-shaped contact terminal design, complete one-time sea-exhaust technology, high & stable quality ceramic metallization technology, and stainless steel direct rivet weld technology.
Does the VB4P circuit breaker require regular oiling?
No. The VB4P features self-lubricative bearings without oil that are highly applicable to over-load and low-speed conditions, avoiding common lubrication failures and realizing maintenance-free operation.