GCB Service Earthing Switch Retrofit Kit for HGC3

GCB Service Earthing Switch Retrofit Kit for HGC-3 & HEC 3. . 6 ABB High Current Systems Services © ABB Group 06 March 2021 | Slide 1

HGC 3 System Earthing Switch Retrofit Kit HGC-3 & HEC 3. . 6 © ABB Group 06 March 2021 | Slide 2 § Manufactured from 1998 – 2010 in Zurich, Switzerland § Optional earthing switch was provided on either or on both sides § Transformer side (3) § Generator side (4)

Why Earthing Switch Retrofit Kit? Earthing Switch Retrofit Kit HGC-3 & HEC 3. . 6 § Challenge § § Solution § § © ABB Group 06 March 2021 | Slide 3 If earthing switch was not equipped during factory assembly, new enclosures would be necessary to supply in order to retrofit 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

Scope of supply Earthing Switch Retrofit Kit HGC-3 & HEC 3. . 6 § © ABB Group 06 March 2021 | Slide 4 Parts and components § Earthing switch complete § Earthing Contact § Support FVZ § Console complete § Earthing switch motor drive § Adaptations control cubical incl. mimic Earthing switch complete Open position Motor Drive Close position

Scope of supply Earthing Switch Retrofit Kit HGC-3 & HEC 3. . 6 § © ABB Group 06 March 2021 | Slide 5 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

Scope of supply Earthing Switch Retrofit Kit HGC-3 & HEC 3. . 6 § © ABB Group 06 March 2021 | Slide 6 Project Based Tasks § Adjustments of existing electrical schematic § Adjustments of customer interlocking system

Summary / Benefits © ABB Group 06 March 2021 | Slide 7 § 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