gis report 1

8/13/2019 GIS Report 1

1/23

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


2/23

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


3/23

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


4/23

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.


CB Box Shifting 8 days.


5/23

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.


Anchor Bolt Fixing 3 Days


6/23

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).


Circuit Breaker Erection 4 days


7/23

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.


CB Alignment 6 days


8/23

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.


CT Erection 6 days


9/23

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


Single Feeder Disconnector 6 days


10/23

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


11/23

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.


Bus duct Enclosure erection 6 days


12/23

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.


Erection of Double bus bar disconnector

and coupling of Bay 1 and Bay 2

6 days


13/23

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.


14/23

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


Support Structure Erection for Bus

EMVT and Line EMVT

4 days


15/23

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.


Erection of Bus EMVT with disconnector 3 days


16/23

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.


Erection of Line EMVT 2 days.


17/23

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.


18/23

GIB Structure Erection:

Structure for Bay 2 - Line 2 erection is in progress.


19/23

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



CT erection for Bay 1 to Bay 9



Single feeder disconnector with high speed and low speed earth switch


Comp Comp Comp Comp NA Comp Comp Comp Comp


20/23

Double bus bar disconnectorCommon Point


Comp Comp Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Coupling


Comp Comp Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Bay VT


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


NA In

Progress

In

Progress

NA ---------- In

Progress

NA NA NA


21/23

GIB Bus duct and Bushing Erection


NA Not

Comp

Not

Comp

NA ---------- Not

Comp

NA NA NA

Single Feeder Disconnector with low speed earth switch


NA NA NA NA Not

Comp

NA NA NA NA

Cabling

Cable laying:


In

progress

In

progress

In

progress

In

progress

In

progress

In

progress

In

progress

In

progress

In

progress

Cable termination


Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Earthing


In

Progress

In

Progress

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp

Not

Comp


22/23

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


23/23

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.

gis report 1

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