| Prod Model: |
VB4 |
| Breaking Capacity: |
High Voltage Circuit Breakers |
| Operation: |
Energy-storage Type |
| Speed: |
High-Speed Circuit Breaker |
| Arc-extinguishing Medium: |
Vacuum |
| Poles Number: |
3 |
| Certification: |
Type Test |
| Installation: |
Draw-out |
| Structure: |
Vcb |
| Function: |
Customized by Relay Protection |
Product Description
12/24kV-1250A-31.5kA indoor drawable type embeded pole vacuum circuit breaker(vcb)
Description
VB4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.
VB4 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.
Advantages
Vacuum 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. VB4 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;
Application
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 characteristics
| Rated voltage1) | kV | 12 | 24 | • / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
• / •• / •
••
•• |
| Rated frequency | Hz | 50 -60 | 50 - 60 |
| Rated normal current | | 630...40002) | 630.25 |
| Rated short-circuit breaking current (symm.) | kA | 16.31.5 | 40 | 50 | 63 | 16.31.5 |
| Rated short-circuit making current | kA | 40.8 | 100 | 1254) | 158 | 40.8 |
| Rated duration of short-circuit4) | s | 3 | 3 | 3 | 3 | 3 |
| Fixed- / withdrawable Version | | • / • | • / • | • / • | • / - | • / • |
Max. overall dimensions
(fixed Version) | mm
p
H
a
b
c | 150-275
205-310
450-700
424
461-5996) | 210-275
310
570-700
424
5996) | 210-275
310
600-750
459
6088) | 275
310
750
459
677 | 210-275
310
570-700
424
631-661 |
| Weight | kg | 73-105 | 94-180 | 147-260 | 265 | 100-110 |
| Embedded Pole | | • | • | • | | • |
| Assembled Pole | | | | | • | |
1) Test voltage according IEC62271-100
2) 4000 A with forced cooling
3) 3150 A with forced cooling in APG 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
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.
WE COMMITTED TO PROVIDE A BETTER POWER
