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
| Vacuum | Gas | ||||
|---|---|---|---|---|---|
| Type | VJ-12 | VJ-12B* | VJ-13 | VJ-22 | VGC-22 |
| 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 | |
| Mass (Kg) | 120/140 | 145/175/245 | 185/245 | 230/250/305 | 600 |
- *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."