Product Description
Vacuum circuit breaker has a high insulating medium for arc extinction as compared to the other circuit breaker. The pressure inside the vacuum interrupter is approximately 10-4 torrent and at this pressure, very few molecules are present in the interrupter. The vacuum circuit breaker has mainly two phenomenal properties.
High insulating strength: In comparison to various other insulating media used in circuit breaker vacuum is a superior dielectric medium. It is better than all other media except air and SF6, which are employed at high pressure.
When an arc is opened by moving apart the contacts in a vacuum, an interruption occurs at the first current zero. With the arc interruption, their dielectric strength increases up to a rate of thousands time as compared to other breakers.
The above two properties make the breakers more efficient, less bulky and cheaper in cost. Their service life is also much greater than any other circuit breaker, and almost no maintenance are required.
| Item | Unit | Data |
| Rated voltage | KV | 12 |
| Maximum working voltage | KV | 12 |
| Rated Current | A | 630-1250 | 630-1600 | 630-1600 |
| Rated short circuit breaking current | KA | 20 | 25 | 31.5 |
| Rated short-circuit switching current | KA | 50 | 63 | 80 |
| Rated peak withstand current | KA | 50 | 63 | 80 |
| 4S rated short-circuit withstand current | KA | 20 | 25 | 31.5 |
| Rated insulation level | 1min Power frequency withstand voltage | KV | 42(fracture 48) |
| lmpulse withstand voltage | KV | 75(fracture 84) |
| Rated short-circuit current breaking times | Times | 50 |
| Rated Operating Mechanism Closing Voltage(DC) | V | AC,DC 110,220 |
| Rated Operating Mechanism Opening Voltage(DC) | V | AC,DC 110,220 |
| Contact opening distance | mm | 11±1 |
| Overtravel(the length of contact spring compression) | mm | 3.5±0.5 |
| Closing/Opening Time Difference Among Three Phase | ms | ≤2 |
| Contact closing bounce time | ms | ≤2 |
| Average opening speed | m/s | 0.9-1.2 |
| Average closing speed | m/s | 0.5-0.8 |
| Tripping Time | Maximum operating voltage | S | ≤0.05 |
| Minimum operating voltage | S | ≤0.08 |
| Closing time | S | 0.1 |
| The main circuit resistance of each phase | | 630≤50 | 1250≤45 | 1600≤40 |
| Allowed Consumpted thickness of Contacts | mm | 3 |
Company Information
INTRODUCTION
Zhejiang Xinkou Power Equipment Co.,Ltd, is a high-tech enterprise specializing in developping, design, manufacture, sales, import and export of low voltage and high voltage electrical products.
Company main products: indoor and outdoor high voltage vacuum circuit breaker, load break switches, disconnecting switches, drop out fuse cutour, lightning arrester, etc. All products comply with the requirements of GB, IEC, ANSI and other international standard.
SERVICE
We have a very professional sales team which can offer you the best service and answer you very professional questions, so you can feel very comfortable before you buy machine from us. As is known to all of us, after-sale service is the most important to all industries. Our company has been trying our best to build a very professional and high-caliber after-sale service team which can solve all problems efficiently in the future.
