ABB UBBRT - Page 10

10
1ZSE 5492-118 en, Rev. 4
fm_00235
Bottom
Bottom valve
drain screw
Moving contacts
Fixed contacts
Fixed contacts
Moving contacts
Change-over selector:
Selector switch:
Cylinder
Flange
Bevel gear
Oil valve
Selector switch shaft
Fig. 2. General arrangement of on-load tap-changer, type UB.
Transition resistor
Current collector
terminal
Shielding rings
Indicator window
Air release valve to on-
load tap-changer
Connection to oil
conservator
Pressure relay
Air release valve
to transformer tank
Top cover
1 Introduction