Post on 17-Dec-2015
© ABB Group April 18, 2023 | Slide 1
Earthing Switch Retrofit Kit forHGC-3 & HEC 3..6ABB High Current Systems Services
GCB Service
© ABB Group April 18, 2023 | Slide 2
HGC 3 SystemEarthing Switch Retrofit Kit HGC-3 & HEC 3..6
Manufactured from 1998 – 2010 in Zurich, Switzerland
Optional earthing switch was provided on either or on both sides
Transformer side (3)
Generator side (4)
© ABB Group April 18, 2023 | Slide 3
Why Earthing Switch Retrofit Kit?Earthing Switch Retrofit Kit HGC-3 & HEC 3..6
Challenge
If earthing switch was not equipped during factory assembly, new enclosures would be necessary to supply in order to retrofit
Solution
To provide easy earthing switch / grounding switch retrofit solution
Objective
Increase safety during maintenance within the PP
Simplify maintenance procedures within the PP
HGC 3 breakers ordered w/o earthing switch do not have an assembly jig
© ABB Group April 18, 2023 | Slide 4
Scope of supplyEarthing Switch Retrofit Kit HGC-3 & HEC 3..6
Parts and components
Earthing switch complete
Earthing Contact
Support FVZ
Console complete
Earthing switch motor drive
Adaptations control cubical incl. mimic
Earthing switch complete
Motor Drive
Open position Close position
© ABB Group April 18, 2023 | Slide 5
Scope of supplyEarthing Switch Retrofit Kit HGC-3 & HEC 3..6
Assembly Procedure Removal disconnector and arcing
chambers
With alternative device, adjustments on enclosure incl. rework
Assembly of earthing switches incl. linkage and motor drive
Reassembly of disconnector and arcing chambers
Adjustments and setting of earthing switch
Wiring of earthing switch to control cubical
Retrofit of control cubical incl. mimic
Mounting of new rating plate
Re-commissioning incl. functional checks
© ABB Group April 18, 2023 | Slide 6
Scope of supplyEarthing Switch Retrofit Kit HGC-3 & HEC 3..6
Project Based Tasks
Adjustments of existing electrical schematic
Adjustments of customer interlocking system
© ABB Group April 18, 2023 | Slide 7
Summary / Benefits
Easy Retrofit Kit available for HGC 3 breakers, originally not equipped with earthing switch
Ensures a safe maintenance process
Can be executed during overhaul of the unit
© ABB Group April 18, 2023 | Slide 8