VB4 Indoor Vacuum Circuit Breaker
DescriptionVB4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.
VS1 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
Their switching capacity is sufficient to handle any conditions arising from switching of equipment and system components under normal operating and fault conditions, particularly short-circuits, within the parameters of their technical data. The vacuum circuit-breakers of type VB4, designed in column form, can be supplied both as individual units for fixed installation and mounted on chassis. Vacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.
AdvantagesVacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. VS1 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:
Short-circuit currents;
Overhead lines under load and, no-load conditions;
Cables under load and no-load conditions;
Transformers under load and no-load conditions;
Generators under load and no-load conditions;
Ripple control system;
Capacitor banks(also parallel switching) and Motors with starting currents above 600A;
Fields of applicationBelow is the list of SM6 range units used in MV/LV transformer substations and industrial distribution substations:
Cable control and protection
Overhead control and protection
Transformers and distribution substations
Motor and transformer control and protection
Generator control and protection
Capacitor bank control and protection
Main characteristics1) Test voltage according DIN VDE 0670, part 1000, list 2
2) 4000 A with forced cooling
3) 3150 A with forced cooling in AP technology
4) Higher values on request
5) 360 mm for fixed, 280 mm for withdrawable Version
6) Circuit-breaker with heat sink 616 mm
7) Withdrawable Version
8) Circuit-breaker with heat sink 634 mm
Serial
Number | Item | Unit | Data |
| | 31.5kA | 40kA | 50kA |
| 1 | Rated voltage | Kv | 12/17.5/24kV |
| 2 | Maximum working voltage | Kv | 12 |
| 3 | Rated current | A | 1250 1600
2000 2500 | 1250 1600
2500 3150 | 1250 2500 3150 |
| 4 | Rated short-circuit break current | KA | 31.5 | 40 | 50 |
| 5 | Rated short-circuit close current (peak value) | KA | 80 | 100 | 125 |
| 6 | Rated withstand current (peak value) | KA | 80 | 100 | 125 |
| 7 | 4S Rated little withstand current | KA | 31.5 | 40 | 50 |
| 8 | Rated insulation level | Industrial frequency
Withstand voltage | KA | 42/50/60 |
Thunder impulse
Withstand voltage | 75/95/125 |
| 9 | Rated operation order | | Off-0.3S on and off-180S-on and off |
| 10 | Mechanical life | Times | 10000 |
| 11 | Rated short-circuit current break and close time | Times | 50 |
| 12 | Speak and move organization amount
Assign the curre t of the floodgate(DC) | | V | 110220 |
| 13 | Speak and move organization amount
Equal to the curre t of the floodgate(DC) | | V | 110220 |
| 14 | Switching distance of the contact | mm | >11 |
| 15 | Ultra journey(touches the head
Springand compress length) | mm | 4+/-0.5 |
| 16 | Three-phase breaking into shut
Floodgate sex of the same period | Ms | <2 |
| 17 | Touch the head and shut a
Floodgate of time of bouncing | | Ms | <2 |
| 18 | Average speed of breaking brake | M/s | 0.9~1.2 |
| 19 | Average speed of closing brake | M/s | 0.6~0.8 |
| 20 | Time of breaking brake | Operate it under the
Voltage highest | S | <0.05 |
| | Operate it under the
Voltage lowest | <0.08 |
| 21 | Time of colsing brake | S | <0.1 |
| 22 | Each the resistance of main return circuit | U Ω | <40 |
| 23 | Allowance abrasion cumulated thickness
Of the moving and stationary contact | mm | 3 |
Founded in 1999, with a registered capital of 10 million USD, Zhejiang Farady Powertec Co enjoys about 20 years' experience in medium voltage 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 Ecomonic develop Zone of Yueqing, Zhejiang, China, main products include: Auto recloser/gas insulated load break switch/capacitor switch/ring main unit/vacuum circuit breaker/SF6 switch disconnector.
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.
Our Advantages:
(1). Professional team: Farady before-sales engineering team give you full support as whole solution
(2). Adquate sale reference: Export to 55 countrys with good sale reference and international bid experiencec
(3). Paper work: Full ISO certificate and product type test convince end user
(4) Quality Assurances
We have a strictly quality control process from the raw material to finished products. Advanced testing lab to make sure products quality and improve our creative ability. Quality and Safety is the soul of our products.
(5) Excellent Services
Many years of manufacturing experience and rich export business help us to establish a well-trained sales service team for all customers.
(6) Fast Deliveries
Strong manufacture capacity to satisfy urgent leading time. It is around 15-25 working days after we receive the payment. It varies according to the different products and quantity.
(7) OEM ODM and MOQ
Strong R&D team for quick new products' development, we welcome OEM, ODM and customize request order. Whether selecting a current product from our catalog or seeking engineering assistance for your application. You can tell us about your sourcing requirements
