FZN25-12Dvacuum load switch and FZN25-12DR composite apparatus are main for 12kV three-phase AC 502Hz ring main unit,urban distribution station whose power is supplide by terminal and industrial consumer to control load and protect under short circuit.Breaking and closing ring closure current of load switch,charging current of non-load transformer and cable,composite apparatus can break till any current of rated short circuit current.
The linkage of direet acting isolation clearance and vacuum rac exting uishing chamber is adopted. It has the unction of hand operation and clectric operation.
FZN25 and FZRN25 series possess special design of driving mechanism,the are exting uishing chamber only can bear voltage during the instant of breaking and closing, so its size is very small,and the price is quite inexpensive.
FZN25 and FZRN25 series can realize one off operation of isolation clearance and are extinguishing chamber clearance.
FZN25 and FZRN25 series has mutual-linkage grounding valve of grounding swith between static contact and moving electric torch,so it can make sure safety and convenient maintenance.