Supply bf-b-12.7 overvoltage protecto

Overview of overvoltage protector , BF-B-12
7  With the increasingly wide use of vacuum switches, various operating voltages caused by their strong breaking capacity put forward a new topic for the protection of power equipment
Due to the particularity of China's medium voltage power grid (3-66KV), the conventional medium voltage arrester is not sensitive to this kind of operating overvoltage and can not play a protective role
Combined overvoltage protector (also known as combined lightning arrester) is a new product to solve this problem
This kind of products adopt four-star connection method (commonly known as Trident connection method) and set a common neutral point, which can not only greatly reduce the phase-to-phase overvoltage, but also improve the relative ground protection level, which really limits the operating overvoltage of vacuum switch

  Xi'an Baofa Electric Co
, Ltd
our products are composite insulation, small and compact structure, overall vulcanization and fully enclosed molding
High quality metal oxide valve plate and porcelain blowing special gap are selected, with high working characteristics, safety and convenience
It is especially suitable for matching with different models of medium voltage switchgear such as KYN, XGN, GBC, jyn and GZS, or directly installed in small box type substation

Purpose and executive standard
  This product is used in AC medium voltage 3 ~ 66kV power system to prevent the infringement of operating overvoltage mainly generated by vacuum switch on power equipment
At the same time, it also has the function of lightning protection

  This product is a new technology product
The fully corresponding national standards are still being formulated and only a part of them are issued
Our company's product technical standards are mainly formulated with reference to gb11032-2000 AC gapless metal oxide arrester, JB / t9672-1999 metal oxide arrester with series gap and DL / t620-1997 overvoltage protection and insulation configuration of AC electrical devices, It shall be revised according to the standard approval draft of JB / t10496-2005 three-phase combined metal oxide arrester without gap and three-phase combined metal oxide arrester with series gap

Service conditions
The normal use conditions of conventional products are as follows:
★ ambient temperature: not higher than + 40 ℃, not lower than - 40 ℃;
★ altitude: no more than 2000m;
★ power frequency: 50 & plusmn; 2Hz； 60± 2Hz；
★ seismic intensity: 7 degrees and below;
★ high wind speed: 35m / S;
★ cleaning free conditions: areas with medium pollution and below ★ for products without gap, the power frequency voltage applied for a long time shall not exceed the continuous operation voltage of the protector;
★ for products with gaps, the short-time power frequency voltage rise at the installation point shall not exceed the rated voltage of the protector

For long-term use under the following abnormal conditions, the protector needs to be specially made, which shall be explained when ordering:
★ the temperature or altitude exceeds the standard (plateau, tropical zone, cold zone, fully enclosed cabinet, close to electric furnace, etc
);
★ there is serious moisture or corrosive gas impurities in the operating environment (water, salt field, chemical plant, etc
);
★ strong ultraviolet radiation (plateau, strong sunshine arid area, etc
);
★ particularly polluted areas (mine working face, construction site working face, etc
)

Model meaning
There is no strict national standard definition rules for this product
At present, all manufacturers,
Define your products according to the model you applied for in the national testing center,
The models of products for the same purpose vary greatly among enterprises
No model approval has been obtained
Manufacturers of the book usually refer to JB / t8459-1996 lightning arrester production standard
Expand the definition according to the general provisions of the preparation method of product model

The nationally recognized model of our products is TBP, and its model is defined as follows: ,
★ at the same time, our company also produces lightning arrester products according to GB / t8459-1996
Conventional combined lightning arrester products defined by the compilation principle of compilation method