ABB VBF Series Instruction For Installation, Service And Maintenance page 56

Dismantling of Operating Coils Setup
Steps For Replacement of Shunt Opening Release (YO1) 15030
When the YC shunt closing release
is present, unscrew the four fixing
screws (14) and withdraw it (15)
Disconnect the power supply connectors of the additional shunt opening release
Unscrew the four fixing screws and withdraw release (8)
YO1 SHUNT OPENING RELEASE
FOR ASSEMBLY, PROCEED IN REVERSE ORDER
Fig. 7
Steps For Replacement of Shunt Closing Release (YC) 15031
YC SHUNT CLOSING RELEASES
Fig. 8
Unscrew the four fixing screws
(17) and withdraw the relative
YO1 release(16).
FOR ASSEMBLY, PROCEED IN REVERSE ORDER
56