24kV HV emedded pole vacuum circuit breakers (VYG series) are widely used in power plants, substations, petrochemical plants, metallurgical industries, mining, manufacturing industry, airport, subway, seaport and residential areas, etc.
VYG series vacuum circuit breakers can be integrated into air insulated switchgears, a perfect replacement for the sleeve type air insulated vacuum circuit breaker.
VYG series vacuum circuit breakers can run stably under following conditions:
1. Altitude: 3000~5000m
While application at 2000m and above, please specify your conditions.
2. Ambient temperature:
Daily average: ≤+35°C
Daily average RH: 95%
Monthly average RH: 90%
Daily average saturated vapor pressure: ≤2.2×10-3Mpa
Monthly average saturated vapor pressure: ≤1.8×10-3Mpa
4. Earthquake withstand ability: not exceed Grade 8
Synthetic seismic wave 0.25g
Sinusoidal wave 0.15g
1. Excellent performance
2. Advanced embedding technology and solid-insulating process
Embedded poles: The three embedded poles of the VYG units totally enclose the vacuum interrupter, both upper and lower outgoing terminals cast in epoxy resin in APG process, a very mature automatic pressure gelatinizing technology. This helps to reduce adjustment requirements, diminish possible damage to the VI during assembly and protect connecting bolts against shock during operation. Also, discharge of the terminals can be prevented due to special conductive copper part. The embedded poles, in epoxy resin with unique material, make features of aging resistance, low/high-temperature resistance. These features protect the VI of the VYG system against any harmful influences from the outer environment. No shock & damp, pollution, condensation, dirt or small animal can ever have a possibility to face the VI, whereas those are always the headaches for the second generation. These distinctive features also enable the embedded poles a greater operating reliability, and high adaptability to various environments. The poles of the VYG series become truly maintenance-free.
Unique cushion bedding process: Since there is a great discrepancy of thermal expansion between the vacuum interrupter (which is enveloped with porcelain) and the epoxy resin (namely 1:10), that will certainly result in various troubles, for instance, cracking problems to the porcelain envelope or to the epoxy resin. However, the special VULCANIZE process is employed for VYG series to settle the above problems in this way: a special flexible bedding fills the spaces between the epoxy resin and the VI, creating a quality cushion that responds to all thermal expansions and contractions, protecting all applied material from any occurrence of aging or insulation degrading, and therefore ensuring the high reliability of the poles under various environmental conditions and the changes of them. This cushion also eliminates air gap between epoxy resin and VI, which may be ionized under high voltage electric field cause insulation or aging problem of embedded pole.
3. A complete set of type test
4. Unique spring actuator
5. Advanced manufacture process, accurate test equipment and stringent quality policy
6. Chinese national standards & international standards
7. Patented vacuum Interrupter with overall small resistance
Main Technical Data:
|2||short time power frequency with stand voltage(1min)||kV||42|
|3||Lighting impulse withstand voltage(peak)||kV||75|
|6||Rated short circuit breaking current||kA||20-50|
|7||Rated short time withstand current||kA||20-50|
|8||Rated short circuit making current||kA||50-125|
|9||Rated short circuit duration time||s||4|
|11||Rated peak withstand current||kA||50-125|
|12||Rated capacitor banks making surge||kA||12.5|
|13||Rated electrical endurance||A||630/400|
|14||Rated operating voltage||AC220/110, DC220/110|
|FOB Price:||US $ 500 - 10,000 / Unit ||
|Minimum Order:||1 Unit/Units|