VA2 OM MS ME ES 001 method statement of electrical system rev 0

METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

FOR APPROVAL

0
Rev

V.K.Hoan
Date

Prepared

T.D.Thinh
Checked

T.N.Khoa
Approved

First Issue
Details of Revision

Owner

VUNG ANG II THERMAL POWER LLC
Owner’s Engineer

TOKYO ELECTRIC POWER SERVICES CO., LTD

EPC Contractor

PACIFIC CORPORATION JSC

Subcontractor

HOP LUC CONSTRUCTION JOINT STOCK COMPANY
Project
VUNG ANG II THERMAL POWER PLANT PROJECT
Title
METHOD STATEMENT OF ELECTRICAL SYSTEM

Document No.
VA2-OM-MS-ME-ES-001

Rev.
0

Page No.
84 page

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

MỤC LỤC/ INDEX
1

2

3

4

5

6

SCOPE OF WORK ............................................................................................................................... 4
1.1

General discription .................................................................................................... 4

1.2

Power supply summary ............................................................................................. 5

1.3

Based on documents .................................................................................................. 6

MATERIALS, EQUIPMENT ............................................................................................................... 7
2.1

List of materials. ........................................................................................................ 7

2.2

List of machinery & tools .......................................................................................... 8

2.3

List of PPE .................................................................................................................. 9

RESPONDSIBILITIES ......................................................................................................................... 9
3.1

Site organization chart .............................................................................................. 9

3.2

Manpower for construction ..................................................................................... 10

REQUIREMENTS OF WORK........................................................................................................... 10
4.1

Coordination at site ................................................................................................. 10

4.2

Trình tự công việc / Sequence of work................................................................... 11

INSTALLATION FOR ELECTRICAL SYSTEM ............................................................................ 12
5.1

Medium voltage (MV) system installation: ........................................................... 12

5.2

Transformer Installation: ....................................................................................... 20

5.3

Generator Installation ............................................................................................. 24

5.4

Electrical underground conduit installation: ....................................................... 28

5.5

Low Voltage Electrical Panel Installation: ............................................................ 32

5.6

Cable ladder and tray installation: ........................................................................ 36

5.7

Electrical conduit installation: ............................................................................... 41

5.8

Power cabling: .......................................................................................................... 46

5.9

Electrical Equipment installation: ......................................................................... 53

5.10

Lightning protection and Earthing installation: .................................................. 66

HSSE Managerment plan................................................................................................................ 73
6.1
6.2

7

Organization ............................................................................................................ 73
Responsibilities .........................................................................................................................73

MEDICAL PLAN ..............................................................................................................................77
7.1

General ......................................................................................................................................77
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

8

7.2

Medical Facility ........................................................................................................................78

7.3

Medical Staff ............................................................................................................................78

RISK ASSESSMENT ........................................................................................................................80

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

1

SCOPE OF WORK
1.1 General discription
Electrical system construction methods apply to areas including: Family apartment,
Management house, Multi-functional gym and healthy care house, Supermarket and
restaurant, external area, substations and pumping stations, sewage treatment plants.

Figure 1.1 Working plan
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

1.2 Power supply summary

Equipment Name

Transformer

Generator

Model

Quantity

Oil immersed type 750KVA35(22)/0.4KV Y/∆/YO-12-11
750KVA-380/230,50HZ

1

1

Table 1.2 Power supplyequipment Name

Figure 1.2.1 Electrical station floor plan

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Figure 1.2.2 Single line diagram
1.3 Based on documents
 Approvalled materials documents.
 Approvalled Shop-drawings.
 Specification of MEP.
 Approvalled inspection & test plan.
 Standards Required by Statutory Regulations.
NO
1

2

3

4

ITEM

STANDARD

National technical regulation on fire safety for houses and

QCVN 06:

buildings

2020/BXD

National technical regulation on energy efficient construction
works.

QCVN
09:2017/BXD

National technical regulation on electrical system of housing

QCVN 12:

and public works.

2014/BXD

National technical regulation on electrical engineering,

QCVN QTĐ

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

NO

ITEM

STANDARD

volume 8: Technical regulations on low voltage.
5

08:2010/BCT
11 TCN

Electrical equipment regulations I, II, III, IV.

18~21:2006

Place electrical equipment in houses and public works -

6

Design standards.
Installation of electrical lines in houses and public works -

7

Design standards.

TCVN 9206 : 2012

TCVN 9207:2012
TCVN 7447

8

Electrical installations of buildings.

(included 14
TCVN)

Lightning protection for constructions - Design - construction

9

standards

10 Lightning protection parts I, II, II, IV

TCVN 9888 :2013
TCVN 7114-

11 Ecgonomi - Workplace lighting - Part 1: In the home.

12

13

14

1:2008

Ecgonomi - Workplace lighting - Part 3: requires safe lighting
and protection of outdoor workplaces.
Artificial

lighting

outside

public

TCVN 71143:2008

works

and

urban

infrastructure engineering - Design standards.
Power cables with extruded insulation and their accessories
for rated voltages.

15 Conductors of Insluated Cables.

16 Power transformers – General.

17 A new standard on Switchgear and Controlgear Assemblies.
18 Rotating electrical machines.
19

TCVN 9385:2012

Protection of structrures and open areas against lightning
using Early Streamer Emission air terminals.

TCXDVN
333:2005
Cables IEC 60502
IEC 60228
Transformer IEC
60076-1
Switchboard IEC
61439
Diesel IEC 60034
NFC 17 – 102 :
2011

Table 1.3 Applicable technical standards
2

MATERIALS, EQUIPMENT
2.1 List of materials.
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Materials use at project for install of electrical system: Transformer, Generator, Medium
voltage cable,LV electrical panel, Cabinets voltage, Cable ladder & tray, power cable,
Electrical equipment, conduit,….
2.2 List of machinery & tools
No

Name

Unit

Quantity

1

Drilling machine

Pcs

2

Forklift hand

Pcs

3

Electrical jack

Pcs

1pcs/5 person

4

Cutting machine

Pcs

1pcs/5 person

5

Electrical Panel

Pcs

1pcs/5 person

6

Hammer

Pcs

1pcs/1 person

7

Pliers

Pcs

1pcs/1 person

8

Hand tools

Pcs

1pcs/1 person

9

Measuring tape

Pcs

1pcs/1 person

10

Line marker

Pcs

1pcs/1 person

11

Scaffolding

Set

1pcs/5 person

12

Ladder

Pcs

2pcs/5 person

13

Tời điện

Lot

4

14

Máy xúc

Pcs

1

15

Cẩu tự hành

Pcs

1

16

Xe cẩu

Pcs

1

Note

1pcs/5 person
1

Table 2.1. List of tools and machinery.
+ Note: The certificated and relevant document of the special equipment will be submitted
prior to use at site.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

2.3 List of PPE
STT/

STT/

Tên / Name

No

Tên / Name

No

1

Hi vis

7

Half Rubber Coated Gloves

2

Safety shoes

8

Plastic coated gloves

3

Safety helmet

9

Face shield

4

Safety uniform

10

Safety boots

5

Safety goggles

11

Safety Harness

6

Ear plug

12

Dust mask

Table 2.2. List of safety equipment mobilization
3 RESPONDSIBILITIES
3.1 Site organization chart

TRINH NGOC KHOA
Site Manager
090.3468.016

TA DUC THINH
Deputy Site Manager
0982.351.435

TRAN VAN TAN
Electrical Engineer

0946.824.893

SITE ENGINEER

DO DINH HUONG
Mechanical Engineer
0359.445.933

SITE ENGINEER

SITE ENGINEER

TR.V.QUAN
HSSE Manager
0979.498.881

TR.D.LAP
Team Leader
0973710987

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

3.2

Manpower for construction
Site

No

Work item

1

manager

ME

Team

manager

leader

Family apartment
Management

2

house

Engineer

QS,QA,QC,
Shopdrawin

HSSE

g

1

4

1

2

1

2

1

2

1

2

Multi-functional
3

gym and health
care house
Supermarket and

4

restaurant

5

1

1

2

3

Park house
Substation and

6

pumping station
Underground

7

sewage treatment
Table 3.1 Construction Staff

No.

Work item

Quantity

Scope of work

1

Mechanical worker

5

Workers are rotated from

2

Electrical worker

30

3

Cleaning workers...……

5

one item to another
depending on the actual
construction

Table 3.2 Construction worker
4 REQUIREMENTS OF WORK
4.1

Coordination at site

- Survey at site before the installation.
- Survey and understand the current progress of the main structure and the site
with reference to Safety Management System and contract requirement and
engineering due diligence.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

4.2

Trình tự cơng việc / Sequence of work

Method of statement
Shopdrawing
Material
Construction plan
Rejected

Approved
Installation of system

Rejected

Approved
Owner/Owner’s Engineer
Inspection

Rejected

Approved
Proceed to other related
works
Sketch 4.2-1 Work flow chart

4.2.1

Preparation

- Listing for all materials used for electrical system, making plan for submission,
purchasing and installation
- Listing for all shopdrawing used for electrical system, making plan for submission
and installation
- Listing for all methodstatement used for electrical system, making plan for
submission and installation
- Survey construction plan.
4.2.2

Documents base on:

- Approvalled material documents.
- Approvalled shop drawings.
- Approvalled construction method statements.
- Approvalled ITP.
4.2.3

Construction procedure:
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Refer to the shop drawings and the project's MEP technical specification to make an
installation methodology for the electrical system.
5 INSTALLATION FOR ELECTRICAL SYSTEM
5.1 Medium voltage (MV) system installation:

5.1.1 Purpose:
- Describe electrical works relate with installating of medium voltage systems.
5.1.2 Method statement
Works are execute base on construction schedule and detailed approval drawing.
a. Material:
Medium voltage concrete pole, medium voltage equipment (Transformer, isolator,
outdoor isolator switch, recloser circuit breaker 35kV-630A, support, etc.), medium
voltage cable.
- Material background check: origin, date of manufacture, assembly drawings,
schematics diagrams, technical specifications with test run data, CO, CQ.
- Material positioning is to consider the risks associated with mechanical damage.
Material are not to be placed in a position where they may be damaged by moving
vehicles, e.g located close to the kerb where they are likely to be struck by heavy
vehicles travelling on a road carriageway or moving in or out drive way access area.
- Tools and equipment for installation must suitable with the manufacturer's
instructions
b. Preparation
- Machinery & tools refer item 2.2
- Check Medium voltage system location follow to approved shop drawing are ready
for installation.
- Check the route to transport material, equipment of MV system to the installation
location.
- Determine actual correct type of material as per position need to install follow to
approval drawing.
- Determine actual, correct & type of support(angle bars, c-channel) and bolt, nut as
per type of equipment and installation position.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- Prepare sand, 1x2 stone, rebar, wood plates, cement to pour the column foundation.
- The Safety Officer will check the area to ensure no potential incidents before
lifting.
c. Installation work
+ MV pole foundation pourring.
- Determine pole position.
- Excavate until requirement depth.
- Clean and flatten bottom of pit.
- Make formwork and put in pit.
- Cut, bend, tie the rebar and put in the pit.
- Proceed concrete pouring.
- All steps of pouring the pole foundation follow the Civil construction method of
concrete pouring

Picture 5.1-1 Cross section drawing of pole foundation
+ MV poles installation:
- After pouring concrete, the column foundation must wait for the allowed number of
days to be erected.
- Clean pole foundation before erection .
- Re-check collisions with other systems while lifting process.
- Accurately locate the center of the pole. After the pole has been put into position,
adjust the pole to vertical.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- Grout void between pole base and foundation. Use non-shrinking or expanding
concrete grout firmly packed in entire void space.
+ Some picture about the medium voltage pole erection work:

Picture 5.1-2 Poles erection by crain.
+ MV equipments installation.
- Install support and secure them firmly before installing MV equipments.
- Determine actual correct type of support as per MV equipment and position need to
install follow to approval drawing.
- Lift or winch each support to the correct position and tighten the bolts.
- After checking that all supports are in place and firmly fixed, Determine correct type
of equipment for each position according to the approval shop drawings.
- Install each equipment and fix it firmly by bolts and nuts of the correct
manufacturer’s type.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Picture 5.1-3 Detailled MV equipment support installation.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Picture 5.1-4 Detailled MV equipment installation
+ MV cable pulling and laying
Attention before lay, stretch cable :
- The anchorage of the cable tension section must be temporarily increased: the
anchor corresponds to the anchorage for preparation for tensioning.
- Corridor of cable pulling route must be cleared to ensure enough conditions for rope
pulling.
- At the intersections that need scaffolding to support the wire, the scaffolding must
be made firmly. Special locations will have their own detailed methodology.
- Hanging Puly, erect scaffolding to support the cable to cross the road...
- Transport cable drum to laying, pulling location.
- The cable coming out of the cable drum passes through the pulley. Check the signal
system to prepare to pull the cable. When the signal is smooth, there are no problems,
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

then issue the command to pull the cable. Pull slowly to adjust the cable out system to
make sure the cable belly is always the natural ground to avoid damage to the cable
while pulling.
- When pulling the cable, the cable drum are placed on the cable drum support
dedicated to the uncoil cable.
- After putting the cable on the pole, proceed to lock the cable.
- Stretch the cable to get the deflection according to the design
- Proceed to lock in place by cable belt after stretching enough deflection.
- Details of cable pulling, laying and connection can be refer in section 5.8.3.

Picture 5.1-5 Cable pulling and stretch cable get design deflection.

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Picture 5.1-6 Installation and connection on pole.
5.1.3 Inspection procedure
+ Internal Inspection:
- Materials shall be checked for quality, quantity, size, type according to
approvalled shop drawing, document, certificate of equipment.
- Inspect MV system installation:
• Check position, leveling.
• Check tightening connection bolts between components.
• Check the cable connection to the equipment.
+ Inspect with Contractor’s and Owner’s Inspector :
- Materials shall be checked for quality, quantity, size, type according to approvalled
shop drawing, document, certificate of equipment by PAC’s Inspector.
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- Inspect Electrical equipment installation:
• Visual check.
• Check beauty hygiene
• Check position, leveling.
• Check tightening connection bolts between components.
• Check the power cable connection to the devices

• Continuty and insulation test record.
5.1.4 Completion Record
- Inspection Record
- As-built documents.
5.2 Transformer Installation:
5.2.1 Purpose:
- Describe electrical works relate with installating of Transformer Oil immersed type
750KVA-35(22)/0.4KV Y/∆/YO-12-11.
5.2.2 Biện pháp thi công/ Method statement
Works are execute base on construction schedule and detailed approval drawing.
a.

Equipment

Transformer Oil immersed type 750KVA-35(22)/0.4KV Y/∆/YO-12-11
- Transformer shall be standard manufacture’s as per approved type.
- As per approved shop catalogue manufacture.
b.

Preparation

- Machinery & tools refer item 2.2
- The work shall be start when civil works of Transformer room have completed,
clean, handed over and approval of installation schedule.
- Check Transformer location follow to approved shop drawing at transformer room
where the Transformer’s position are ready for installation.
- Check the route to transport the genrator to the installation location.
- Check floor level of Transformer plinth, check the door hight and wide.
- Before construction, it is required to clean the construction site area.
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- For transformer installed on foundation, floor use means such as rollers,
cranes, and lifts etc
- The Safety Officer will check the area to ensure no potential incidents before
lifting.
c. Installation work
- Making of position for Transformer on foundation.
- Bring the transformer into installation position by forklift or wooden roller.
- secure panel base to the floor/wall using anchor bolts.
- Check and align level by bolt, nut leveling before tighten bolt.
- After installation, fix the transformer, proceed to connect the ground to the
transformer.
- Insulation test for cable before connecting the switchboard, record the
insulation measurements.
- Transformer cable connection .
- Clean the transformer with a vacuum cleaner. Check all connections for
tightening bolts, insulation of colored cables and cable markings. Connect the
ground wire from the cable tray ladder to the transformer cover.
- Fix the anchor bolt to the plinth.
- Check the leveling by adjusting the leveling bolt.
- Some picture about the transformer installation work:

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Figure 5.2-2 Transport transformer by forklift

Figure 5.2-3 Check transformer grounding

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

Figure 5.2-4 Push transformer into position

Figure 5.2-5 EVN Inspect transformer.
5.1.3 Inspection procudure
+ Internal Inspection:
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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- Materials shall be checked for quality, quantity, rating and size.
- Check technical installation after setting.
- Inspect transformer installation:
• Check position, leveling and condition of Transformer.
• Check correct anti vibration base.
+ Inspect with Contractor’s and Owner’s Inspector :
- Materials shall be checked for quality, quantity, rating and size by PAC’s Inspector.
- Inspect transformer installation:
• Visual Inspection:
• Check quality of installed Transformers on site.
• Check position, leveling, rating and condition of Transformers.

• Check correct components of Transformer.
• Check correct anti vibration base.
- Take a sample of circulating cooling oil for testing and take test record.
5.1.4 Completion Record
- Inspection Record
- As-built documents
5.3 Generator Installation
5.3.1 Purpose:
- Describe electrical works relate with installating of Generator 750KVA380/230,50HZ.
5.3.2 Method statement
Works are execute base on construction schedule and detailed approval drawing.
a. Equipment
Generator 380V/220V AC, 3 phase, 4 wire - capacity 750/825kVA, with noise shell :
• Engine brand: VMAN (German technology), Made in: China. Model: D22AZ
• Alternator brand: VMAN. Made in China. Model: VA750
• Controller: VMAN. Made in China. Model: VMAN4.0

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METHOD SATEMENT OF FIRE SYSTEM FOR O&M ACCOMODATION

- Generator shall be standard manufacture’s as per approved type.
- Size, type: As per approved catalogue manufacture.
b. Preparation
- Machinery & tools refer item 2.2
- The work shall be start when civil works of Generator room have completed, clean,
handed over and approval of installation schedule.
- Check Generator location follow to approved shop drawing at generator room
where the Generator’s position are ready for installation.

- Check the route to transport the genrator to the installation location.
- Check floor level of Generator plinth, check the door hight and wide.
- Before construction, it is required to clean the construction site area.
- Use means such as rollers, cranes, and lifts etc
- The Safety Officer will check the area to ensure no potential incidents before
lifting.
c. Installation work
- Making of position for Generator on foundation.
- Secure panel base to the floor/wall using anchor bolts.
- Check the leveling before tighten bolt.
- After installation, fix the electrical cabinet, proceed to connect the ground
to the cabinet.
- Insulation test for cable before connecting the switchboard, record the
insulation measurements.
- Generator cable connection .
- Clean the generator with a vacuum cleaner. Check all connections for
tightening bolts, insulation of colored cables and cable markings. Connect the
ground wire from the cable tray ladder to the generator cover.
- Fix the anchor bolt to the plinth.
- Check the leveling by adjusting the leveling bolt

25