1.1 Introduction to Inflatable cabinets
Inflatable cabinet ManufacturersThe inflatable cabinet medium pressure metal closed switchgear has two kinds of insulation, one is air insulation, the other is compressed gas insulation. The former appears earlier and uses more. Our country is generally called switchgear, the latter called the inflatable cabinet.
The so-called inflatable cabinet is a metal-enclosed switchgear that closes high-voltage components (such as circuit breakers, isolation switches, load switches, grounding switches, transformers, Busbars, etc.) in enclosed housings filled with relatively low pressure compressed gases (such as compressed air, SF6, nitrogen, etc.).
1.2 Classification of inflatable cabinets
Inflatable cabinet manufacturers in the inflatable cabinet is according to the insulation can be divided into compressed air type, SF6 type, N2 type or SF6 and N2 mixed type, of which SF6 insulation mode is the most.
According to the use of high-voltage components, can be divided into load switch type, load switch + fuse combination type and circuit breaker type.
According to the shell material, there are two types of inflatable cabinets: One is aluminum cylinder type, the other is steel plate type. For example, Siemens 8DA10/8DB10 is an aluminum tube, 8DC11 is a steel plate type.
2. History of Inflatable Cabinets
Inflatable cabinet manufacturers of inflatable cabinets following ordinary air insulation switchgear, Siemens in 1982 took the lead in the development of SF6 insulated circuit breaker cabinets. Later, major well-known companies have launched their own products, such as ABB SAFE series (see Figure 1), Schneider RM6, Alstom FB series products.