ProductsVacuum Circuit Breaker
MEIDEN vacuum circuit breaker (VCB) employs a proven vacuum interrupter (VI) with excellent interrupting efficiency. It has passed a series of type-tests and is designed, tested and manufactured in accordance with IEC and BS standards under rigorous controls. We are equipped with a very sophisticated and flexible manufacturing setup to make VCB that can withstand operating current up to 2000A. The four major types of VCB and one GIS model are as follow:
Major Types of VCB and GIS
|Rated Voltage (kV)||12||15||24||24|
|Rated Normal Current (A)||630/1250||630/1250/2000||1250/2000||630/1250/2000||1250|
|Rated Short-Circuit Breaking Current (kA)||25||31.5||25||25|
|Rated Short-Circuit Withstand Current (kA)||25 - 3 sec||31.5 - 3 sec||25 - 3 sec||25 - 3 sec|
|Rated Break Time (ms)||60||70||70|
|Rated Opening Time (ms)||40||50||50|
|Closing Time (ms)||50||50|
|Rated Operating Sequence (ms)||O - 0.3S - CO - 3 min - CO||0 - 0.3S - CO-3 min - CO|
|Rated Lightning Impulse Withstand Voltage (kV peak)||75||95||125||125|
|Rated Frequency (Hz)||50/60||50/60|
|Rated Transient Recovery Voltage kV/ms||0.34||0.39||0.47||0.47|
- *VJ-12B supersedes and is downward-compatible with VJ-12A. Certain degree of modifications can be made to the breaker. For example, the maximum operating current of a 630A breaker can be increased to 800A without changing the overall physical size. Manufacturing specialists are trained in Meidensha Corporation in Japan to ensure a high quality is achieved and maintained.
"This high performance VCB conforms to IEC-62271-100 and all primary components employed therein are in accordance to the relevant IEC standards. Furthermore, by incorporating it with SF6 gas insulation, the resulted synergy sets a new dimension with regards to reliability, reduced maintenance and smaller space requirement due to its compact design."