gis report 1
TRANSCRIPT
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400kV GIS, Krishnapattnam
EPC Contractor : BGR Energy Systems Limited.
Erection Contractor : ALSTOM T&D India Ltd.
Erection Sub Contractor : RB Electrical & Mechanical Works
ALSTOM came to Site and Started to work from September 4, 2013 (04.09.2013).
Works Completed:
Marking Core Cutting CB Box Shifting Anchor Bolt Fixing Structure Checking CB Erection CT Box Shifting and Testing CB Alignment CT Erection Single phase feeder disconnector Cable Laying Bus duct Enclosure for Common Point Disconnector Erection of Double Bus bar Common Point disconnector Cable tray Erection VT Box Shifting and Testing Line VT Support Structure Erection Bus EMVT Support Structure Erection Erection of BUS EMVT Erection of Bay VT GIB Marking and Core drilling GIB Structure Erection
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Marking:
Marking was started on Sep 4, 2013. All four References are marked with Co
Ordinates given in the drawings. Centre Point for all bays was marked and Axis for all 3 poles is
marked with Total Station.
Work Description Time Taken to complete
Marking 5 Days
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Core Cutting:
It was started consequently after the completion of Axis Marking. We have to do
12 no. of holes for 1 breaker. We have 3 breakers for 1 bay.
Totally we have 9 bays
1 bay - 3 breakers = 36 no. of holes
9 bays27 breakers = 324 no. of holes
M18 Core Cutting bit was used to Core out the Concrete.
Work Description Time taken to complete
Core cutting 4 days
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CB Box Unpacking and Shifting:
CB Boxes are started to unpack and shift inside GIS building from 9th
day
onwards. All 27 Breakers are unpacked outside GIS and shifted inside.
Work Description Time taken to complete
CB Box Shifting 8 days.
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Anchor Bolt Fixing:
Chemical Stud Capsules M16*125 are packed inside the drilled hole to
strengthen the bolt with concrete and Fastened with Anchor bolts. M16 Anchor bolts are
fixed for all bases.
Work Description Time taken to complete
Anchor Bolt Fixing 3 Days
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CB Erection
A day after Anchor bolt fixing, CB Base Structure Erection is completed within two
days. CB Positioning is taken place after Base Structure Erection from Bay 1Bay 9. Totally
we have 27 breakers for 9 bays (3 breakers for Each Bay).
Work Description Time taken to complete
Circuit Breaker Erection 4 days
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CB Alignment:
CB Alignment was started after completion of CB Erection. During marking time, we
have marked the point based on which CB is going to align. CB Alignment tool was fixed at the
top of Breaker. The Top level of the Breakers for all bay is 2327mm from 0 level.
Work Description Time taken to complete
CB Alignment 6 days
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Current Transformer Erection:
CTs are started to erect consequently after the completion of CB Alignment. Here we are
having four types of CTs based on its core.
Work Description Time taken to complete
CT Erection 6 days
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Single Feeder Disconnector Erection:
Erection of Single feeder Disconnector with High speed and low speed earth
switch was carried out as a parallel activity during the erection of Current Transformer.
Bay No. of. Cores Core Details
Line 1 5 Cores F1 F1 N2 F1 F1
Line 2 5 Cores F1 F1 N2 F1 F1
GT 1 6 Cores F1 F1 N2 N5 F1 F1
Bus Reactor 1 5 Cores F1 F1 N4 F3 F3
Bus Coupler 5 Cores F1 F1 N2 F1 F1
ST 1 6 Cores F6 F6 N9 N8 F7 F7
ST 2 6 Cores F6 F6 N9 N8 F7 F7
GT 2 6 Cores F1 F1 N2 N5 F1 F1
Bus Reactor 2 5 Cores F1 F1 N4 F3 F3
Work Description Time taken to complete
Single Feeder Disconnector 6 days
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Cable laying:
Cable laying was started parallel after the completion of Current transformer and
Single feeder Disconnector and is progress.
Bay Total no. of cables Cables Laid
Bay 1 - Line 1 64 Cables 27 Cables are laid and
Glanded
Bay 2 - Line 2 64 Cables 27 Cables are laid and
Glanded
Bay 3 - GT 1 64 Cables 30 Cables are laid and
Glanded
Bay 4Bus Reactor 1 64 Cables 27 Cables are laid and
Glanded
Bay 5 - Bus Coupler 64 Cables 42 Cables are laid and
Glanded
Bay 6ST 1 64 Cables 30 Cables are laid and
Glanded
Bay 7ST 2 64 Cables 30 Cables are laid and
Glanded
Bay 8GT 2 64 Cables 30 Cables are laid and
Glanded
Bay 9Bus Reactor 2 64 Cables 27 Cables are laid and
Glanded
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Bus duct Enclosure Erection for Common point:
Bus duct Enclosures are erected for 8 bays to mount Double Bus bar Disconnector
on its top. This erection is started after Single feeder disconnector erection.
Work Description Time taken to complete
Bus duct Enclosure erection 6 days
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Double Bus Bar Common point disconnector
Double bus bar disconnector erection was completed for Bay 1 and Bay 2.
Totally we have 24 nos. of Double bus bar common point disconnector. We have erected 6 nos.of Disconnectors.
Coupling:
Bus Coupling is done as a parallel activity with the erection of Double bus bar
disconnetor erection for Bay 1 and bay 2.
Work Description Time taken to complete
Erection of Double bus bar disconnector
and coupling of Bay 1 and Bay 2
6 days
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Cable Tray Fixing:
It is a parallel activity and started after the erection of Double bus bar
disconnector and is in progress up to now.
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Bus EMVT Support Structure Erection:
There are 2 sets of Structures are going to be erected in GIS Building for
Supporting Bus EMVT.
Main Bus 1
Bus EMVT 1
Main Bus 2 - Bus EMVT 2
Now, we have completed the erection of Bus EMVT 2 Support Structure.
Line EMVT Support Structure Erection:
Line EMVT support is fixed in parallel with the Erection of Bus EMVT 2
Work Description Time taken to complete
Support Structure Erection for Bus
EMVT and Line EMVT
4 days
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Erection of Bus EMVT :
Bus duct Enclosure and Single feeder disconnector with High speed and low
speed disconnector was erected main bus bar 2 and Bus EMVT is connected to the
Disconnector.
Work Description Time taken to complete
Erection of Bus EMVT with disconnector 3 days
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Line VT Erection:
Line VTs are erected for Bay 1Line 1. The Angle which supports the line VT is
not found at site. So we constructed Scaffolding arrangement to provide extra support to LineEMVT and it takes half a day time to complete.
Work Description Time taken to complete
Erection of Line EMVT 2 days.
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GIB Marking and Core Cutting:
Clearance for GIB marking is given by civil on Nov 5, 2013 and we started
marking on the same day onwards. Both GIB marking and core cutting are in progress.
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GIB Structure Erection:
Structure for Bay 2 - Line 2 erection is in progress.
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Back Charging was planned on January, 2014
All works should be completed including LV Commissioning on December 31,
2013. HV Test should start from January 1, 2014.
Works are completed and has to be completed for Back Charging of 400kV GIS.
LCC Erection
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Comp Comp Comp Comp Comp Comp Comp
CB Erection for Bay 1 to Bay 9
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Comp Comp Comp Comp Comp Comp Comp
CT erection for Bay 1 to Bay 9
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Comp Comp Comp Comp Comp Comp Comp
Single feeder disconnector with high speed and low speed earth switch
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Comp Comp NA Comp Comp Comp Comp
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Double bus bar disconnectorCommon Point
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Coupling
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Comp Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Bay VT
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Comp Not
Comp
Not
Comp
NA NA Not
Comp
Not
Comp
Not
Comp
NA
Bus EMVT
Main Bus 1 Main Bus 2
Not completed Completed
GIB Marking and Core cutting
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
NA In
Progress
In
Progress
NA ---------- In
Progress
NA NA NA
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GIB Bus duct and Bushing Erection
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
NA Not
Comp
Not
Comp
NA ---------- Not
Comp
NA NA NA
Single Feeder Disconnector with low speed earth switch
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
NA NA NA NA Not
Comp
NA NA NA NA
Cabling
Cable laying:
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
In
progress
In
progress
In
progress
In
progress
In
progress
In
progress
In
progress
In
progress
In
progress
Cable termination
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Earthing
Bay 1 Bay 2 Bay 3 Bay 4 Bay 5 Bay 6 Bay 7 Bay 8 Bay 9
In
Progress
In
Progress
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
Not
Comp
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Manpower Requirement:
Work Front Manpower
Requirement
Designation
GIB Bus Duct Erection 3 Fitter
Cable laying 2 Electrician, Helper
Cable termination 3 Electrician
Double bus bar disconnector
Erection and Coupling
4 Fitter
Marking and Core cutting 2 Fitter, Helper
Structure Assembly 2 Fitter
Cable tray, Earthing 2 Electrician, helper
Totally 18 Manpower are needed. (Excluding supervisor)
Now we have 9 nos. of manpower from RB Elect and Mech works.
Supervisor - 1
Fitter5
Electrician2
Helper1
Still we need 10 more manpower at site.
Electrician
3
Fitter5
Helper2
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Work has been carrying over for 65 days from September 4, 2013
(Including delays)
65 Accident free days, Zero Man hour lost. No near miss accident.