Earthing Switch Retrofit HGC-3 ABB High Current
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Transcript Earthing Switch Retrofit HGC-3 ABB High Current
GCB Service
Earthing Switch Retrofit Kit for
HGC-3 & HEC 3..6
ABB High Current Systems Services
© ABB Group
February 13, 2015 | Slide 1
HGC 3 System
Earthing Switch Retrofit Kit HGC-3 & HEC 3..6
© ABB Group
February 13, 2015 | 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
February 13, 2015 | 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
February 13, 2015 | 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
February 13, 2015 | 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
February 13, 2015 | Slide 6
Project Based Tasks
Adjustments of existing electrical schematic
Adjustments of customer interlocking system
Summary / Benefits
© ABB Group
February 13, 2015 | 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
© ABB Group
February 13, 2015 | Slide 8