De-energized tray-form tap-changer
This type of tap-changer was designed by Sanmen Tenglong Electric Appliance Co.Ltd. and the related factories with the help of Shenyang Transformer Research Institute in May 1 994. This tap-changer which is made of new structure , new material and new technology has the merits of reasonable in structure , handle freely, turning flexibly, locating exactly, good hermetically performance and small value of contact resistance ,it has become the new generation product in these days and has been certified by Ministry Department of China in December 1995. There are two sorts of products for this tap-changer, it is suitable for oilimmersed three phase or single-phase power transformer with frequency 50Hz or 60Hz, highest Voltage for equipment 12kV and 40.5kV and 72.5kV, rated current 63A, 125A, 250A and 400A. It can be fixed directly on transformer tank cover or tank wall, they must be working under non-energized condition.
WSP II₁、WSP III₁，Series de-energized Tap-changer ( Tray form )
WSP III₃ Series de-energized Tap-changer ( Tray form)
WDP ll₂ 63/15-6 X 5QS Series de-energized Tap-changer ( Tray form )
WDP ||₃ 63/□ -6x5 Series de-energized Tap-changer ( Tray form)
Whole sealing ( QMF ) disc、strap de-energized tap-changer
The whole sealing disC、strap de-energized tap-changer is applicable to the whole sealing oil-immersed power transformer and ameliorate the switch's sealing property according to the requirements of the whole sealing transformer，meanwhile, it can improve the level of the transformer on all respects by adopting the dual sealing to ensure the non-immersion of the switch. This switch's mounting dimensions and method are the same of the general switch with same specifications.
WSP II₂ 63~125/12~40.5-4x3~6x5 tray-form De-energized tap-changer
This instruction applies to WSP |I 2 63~125/12~40.5-4x3~6x5 type of de-energized tap-changer for pad-mounted transformer specifically used to change its step positions under no-energized condition，the switch is suitable for three-phase pad-mounded transformers with highest voltage for equipment of 12、40.5kV, rated current of 125A and below, it must be operated when the transformer is under de-energized state .
WSP II₂ 250/12-6x5SX tray-form De-energized tap-changer