INCREASE TRANSFORMER CAPACITY (ITC) FROM 2X15MVA

TO 2X30MVA AT PMU 132KV SONGSANG, PAHANG

Client
TENAGA NASIONAL BERHAD

CONTRACT NO. TNB 159/2014

Main Contractor
PTIS ENGINEERING SDN BHD
NO. 3A, Jalan Kelumpang Satu 27/41A
Taman Bunga Negara, Seksyen 27
40400 Shah Alam
Selangor Darul Ehsan

METHOD OF STATEMENT
DIAMOND CONCRETE CORING
WORKS

Document No. : PJ37/MOS/ELECT/01

Prepared by: Review by: Endorsed by: Checked by: Checked by:

Hafizul Tarmizi Mohd Hafizuddin ( ) ( )

Engineer/Senior Project Manager Competence
PTIS Engineering PTIS Engineering Engineer Engineer/Senior Engineer/Senior
SDN BHD SDN BHD Engineer AD Engineer AM
 CONTENT OF REPORT

TITLE

1.0 CONTRACT PARTICULARS

1.1 GENERAL PARTICULARS
1.2 SCOPE OF WORKS

2.0 PROJECT SCHEDULE

2.1 WORK PROGRAM

3.0 SAFE WORK PROCEDURE

4.0 METHOD OF STATEMENT

5.0 HIRARC

6.0 COMPETENCE/ELECTRICAL SERVICE ENGINEER

7.0 LIST OF WORKERS- CIDB / NSTP CERTIFICATION

8.0 APPENDICS
1.1 GENERAL PARTICULARS

Increase Transformer Capacity (ITC) From 2X15MVA To

1. Project Name :
2X30MVA At PMU 132kV Songsang, Pahang.
Tenaga Nasional Berhad (TNB)
2. Owner :

Regional Manager (East)

3. Project Manager :
Asset Developement Department,
Transmission Division TNB,
Level 10, Wisma TNB,
Jalan gambut, Kuantan
Pahang Darul Makmur.

PTIS Engineering S.B.

4. Main Contractor :
No. 3A, Jalan Kelumpang Satu 27/41A
Taman Bunga Negara, Seksyen 27
40400 Shah Alam
Selangor
TNB (T) 415/2014 (ERMS:550026793)
5. Contract No. :

25th September 2014

6. Date of Letter of :
Acceptance

17th October 2014

7. Commencement Date :

17th Jun 2016

8. Completion Date :

609 Days
9. Contract Duration :

12 months
10. Defect Liability Period :

RM 8,626,561.98
11. Contract Amount :
1.2 SCOPE OF WORKS

The purpose of the procedure is to establish a safe, efficient and quality program
For diamond concrete coring works.
Scope of works:
1. To make an opening by coring method for incoming cable at ;

a) Cable access for additional 2 nos 11kV Switchgears

b) Cable access for Metering Panel.

c) Cable access for Tx1 Control Panel.

2.0 Project Schedule
 DAY 1
ACTIVITY Hour Hour Hour Hour Hour Hour Hour Hour Hour Hour Hour Hour Hour REMARKS
1 2 3 4 5 6 7 8 9 10 11 12 13

PTW, barricade and safety

briefing

Preparation

Set-up the protection canvas

Start Coring works at 11kV

Switchgear room.

Set-up the protection canvas

Start Coring works at 132kV

room.
 3.0 Safe Work Procedure

SAFEWORK PROCEDURE
1.0 Purpose:

For ensure proper working procedure had been follow in working inside substation.

2.0 Permit to Works

a) Permit to work will be issued by authorized person for all works to be carried out on
high voltage equipment, which is normally ‘LIVE’ unless such equipment can be
physically removed contact with ‘LIVE’ busbar or system.
Permit to Work will also be issued for all works on medium voltage busbar system.

b) A Record of the PTW issued shall be made in the substation or switch room logbook.

c) A Permit to Works will become necessary for all HV equipment once it has been
energized for the first time and commission.

d) The person to whom the permit to Work is issued shall be a competent person who
will retain the (PTW) in his procession at all time while the works is in progress.

e) The apparatus ‘ISOLATED’ and ‘EARTED’ for works the condition of a PTW
Shall remain so until the PTW has been cleared return to an authorized person and
canceled.

f) When works on apparatus for which a PTW has been issued is suspended or
complete the recipient shall sign the clearance and return the PTW and re-energized
the equipment if necessary.

g) Before being re-energized , all high voltage and medium voltage circuit that he had
works carried out upon their normally ‘LIVE’ portion must be tested to ensure that
they are safe

3.0 Safety At Work Site

The person in charge of a working party shall ensure that all the times the member of
his party thoroughly understand the work they have to do and the safety precautions
condition.

a. Owner issued permit to work at site.

b. Danger notice and barrier, existing barricade is sufficient to ensure work is

carried out within the designated safety area.

c. Safety on tools and equipment, the JCB Breaker must be inspected that are in
good condition.

d. All workers must wear protective helmets (hard hats) when working in area
where the potential for injury to the head from failing or moving objects and
when they are near exposed electrical conductors which their heads could
contact.
 e. Works shall be stop in the event of high wind or other adverse weather
condition which would make the work hazardous.

f. No equipment or material shall be stored under an energized bus or line or

near equipment.

g. Operation near adjacent to overhead high voltage lines are prohibited unless
equipment or any part thereof does not have the capability of coming within
the distance of 4750mm from the energized lines.

4.0 Access to High Voltage Apparatus / Zones

a. All high voltage apparatus shall be regarded as LIVE until has been isolated,
earthed and made subject of a Permit to Work.

b. Barnes (including rates on access ladders) cutting off access to enclosures,

chamber, cubicle on cell containing exposed high voltage conductor shall be kept
locked and shall not be open by an authorized person.

c. All spout shutters other than those made subject of a Permit to Work shall be
locked shut.

d. A High Voltage Zone under Permit to Work shall be barricaded and all work by
Contactors and/or their employee shall be confined within the Zone and be
immediate charge of a qualified person provided for under the Electricity
Regulations 1994.

e. Portable ladders (except of an approval typed) and long objects are not allowed
within the High Voltage Zone. The use of such objects shall be under the direct
supervision of the person in charge of the work and when moved at ground level
they shall be carried only in a horizontal position and as near to the ground as
practicable.

f. No person shall climb any structure in a High Voltage Zone unless the safe-
nature of the climb is checked by a second person on the immediate vicinity. In
every case one of the above two person must be a Competent Person.

g. No vehicle is allowed to move about, load or unload in a High Voltage Zone

expert as approved by the person in charge.

h. Cranes or other equipment shall be taken into or out of a substation via

predetermined route approved by the Authorized Person.

5.0 Electrical Parameters and Clearances

The following is the table for standard electrical parameter and clearances to be followed.
 Table Electrical Parameters And Clearances

Nominal System Voltage kV 275 132 33 22 11

(phase to phase) rms
Rated Voltage kV 300 145 36 24 12
rms
Power frequency withstand kV 380 275 70 50 28
voltage (1 minute) rms
Lightning impulse withstand kV 1050 650 170 125 75
voltage peak
Switching impulse withstand kV 850 - - - -
voltage peak
Minimum clearance between mm 2082 1270 381 279 203
Live Metal and Earth
Minimum clearance between mm 2515 1432 432 330 254
Live Metal of Difference
Phase
Minimum safety clearance mm 2440 2440 2440 2440 2440
between ground and the
nearest point of an insulator
Minimum safety clearance mm 4570 3500 2740 2740 2590
between ground of a working
platform and the nearest live
unscreened conductor
4.0 METHOD OF STATEMENT
4.1 Diamond Concrete Coring Works
5.0 HIRARC
6. COMPETENT ENGINEER
7. LIST OF WORKERS
8. APPENDICS
8.1 Consultant Approval
8.2 Coring Location Drawing
8.3 HILTI Coring Machine
8.4 Photo

8.4 Photo
11kV Switchgear Room
 Location to be coring for additional 2 nos 11kV Swithgear

View from the cable cellar [Location to be coring]

132kV Control Room

Location to be coring for additional beside DC DB

View from the cable cellar [Location to be coring]