ABB VBF Series Instruction For Installation, Service And Maintenance page 55

Dismantling of Operating Coils Setup
Unscrew the fixing screw of the release group mount
Unscrew the four coil fixing screws
(14) and withdraw the relative YC
coil (15).
Fig. 5
Steps for replacement of shunt opening release (Yo2)
YO2 SHUNT OPENING RELEASE
FOR ASSEMBLY, PROCEED IN REVERSE ORDER
Fig. 6
Withdraw the release group mount from
the front of the operating mechanism. For
assembly, proceed in the reverse order.
Unscrew the four coil fixing screws
(19) and withdraw the relative YO1
coil (18).
55