Since the 1950s,the development of medium voltage switchgear has experienced open,box-type,metal closed and other  stages,and there is no problem in meeting the functional use requirements of the equipment,and the product has already been serialized and the scope ofuse has been fully covered.The rapid development of small size,maintenance-free,high modularity,safe and reliable environment-friendly gas insulated ring network cabinet can realize the remote monitoring,control and management of the power system distribution network,and realize the needs of power grid optimization,electricity safety,power management, energy saving and consumption reduction;At the same time,the system can be widely used in transportation,factories,hospitals, schools,buildings,residential areas and commercial office buildings and other intelligent power distribution fields.

PRODUCT CHARACTERISTICS:
◇Functional  composite,integrated  products
The inflatable shell of the switchgear is made of high quality thick 2.5mm stainless steel plate by laser welding,which ensures the airbox sealing reliability,high mechanical strength,good corrosion resistance,and the protection level of the inflatable shell reaches  IP67;The gas box is equipped with explosion-proof diaphragm,which can effectively prevent the damage caused to people and equipment when the air pressure is too high;The sealing ofall conductive components in the air box not only avoids the  influence  of  external  environmental  factors,but  also  improves  operational  reliability,making  it  maintenance-free  (or  less maintenance-free),but also meets the requirements of miniaturization.
The  switch  adopts  three-station  (isolation  +grounding)+vacuum  arc  extinguishing  chamber,which  is  the  most  mature configuration method at present,especially suitable for the current powergrid operation and maintenance needs.
◇Environmental protection,no pollution
The insulating medium of the WHHBN-12 energy-saving and environmentally friendly fully insulated ring cabinet is zero- level dry air(purchased)or 99.99%pure N2 in line with GB/T 8979-2008,and the leakage of the gas will not have any impact on the  external environment,without any recycling treatment.
◇Perfect mechanical chain
The operation panel of the WHHBN-12 energy-saving and environment-friendly fully insulated ring cabinet has a perfect five- guard mechanical interlocking function.All the interlocking functions are configured inside.Please follow the order of operation instructions when operating,and it is very convenient to use.
◇Flexible expansion design
The WHHBN-12 energy-saving and environmentally friendly fully insulated ring network cabinet is a modular design,which can realize diversified unit combinations of various modules through dedicated bus connectors,and meet the complex and diverse distribution design schemes in various places in China to the maximum extent.