Product Description
CONSTRUCTION OF VACUUM CIRCUIT BREAKER
It is very simple in construction as compared to any other circuit breaker. Their construction is mainly divided into three parts, i.e., fixed contacts, moving contact and arc shield which is placed inside the arc interrupting chamber.
vacuum-circuit-breakerThe outer envelope of vacuum circuit breaker is made up of glass because the glass envelope help in the examination of the breaker from outside after the operation. If the glass becomes milky from its original finish of silvery mirror, then it indicates that the breaker is losing vacuum.
The fixed and moving contacts of the breaker are placed inside the arc shield. The pressure in a vacuum interrupter at the time of sealing off is kept at about 10-6 torr. The moving contacts of the circuit breaker are move through a distance of 5 to 10 mm depending upon the operating voltage.
The metallic bellows made of stainless steel is used to move the moving contacts. The design of the metallic bellows is very important because the life of the vacuum circuit breaker depends on the ability of the component to perform repeated operations satisfactorily.
| Item | Unit | Data |
| Rated insulation level | 1min power frequency withstand voltage | Dry | KV | 42 | 65 |
| Wet | 34 | 50 |
| Lightning impulse withstand voltage | 75 | 1250 |
| | Rated short circuit breaking current | KA | 20;16;12.5 | 20;16;12.5 |
| Rated short circuit breaking times | Times | 30 | 30 |
| Rated short-circuit switching current | KA | 50 | 50 |
| Rated peak withstand current |
| Rated short-circuit withstand current | 20 | 20 |
| Rated short circuit duration | S | 4 | 4 |
| Opening time(SHT) | Maximum operating voltage | ms | 15-50 | 15-50 |
| Rated operating voltage |
| Minimum operating voltage | 30-60 | 30-60 |
| | Closing time | ms | 25-50 | 25-50 |
| Full-off time | ≤100 | ≤100 |
| Arcing time | 20 | 20 |
| Mechanical life | Times | 1000 | 1000 |
| Charging motor rated input power | W | 40 | 40 |
| Rated operating voltage and auxiliary voltage circuit | V | DC220,110,24 | DC220,110,24 |
| AC220,110,24 | AC220,110,24 |
| Rated voltage of the storage time | S | ≤10 | ≤10 |
| Over current release | Rated current | A | 5 | 5 |
| Trip current accuracy | % | ±10 | ±10 |
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.
