Method Statement Title: Installation of Generator and ATS.

Md Abu Zaed Khan

2 years ago

1.0 Scope

This method statement details the method of installation of Generator and ATS according to the Specification Section 16402.

Note : A separate Method Statement Ref. : ETA/MS/E-039 shall be submitted for Testing & Commissioning of Generator and ATS.

2.0 Material

All materials shall be as per approved material submittals, shop drawing and single line diagram.
- Generator & ATS.
- Cable glands and lugs.
- Identification labels and tags.

3.0 Applicable Location

4.0 Method

Generator & ATS shall be inspected upon receipt at site for damages and compliance with the approved schematic.

Upon completion of receiving inspection, the Generator & ATS shall be positioned at the correct locations with suitable crane arrangements.

Generator & ATS found with transportation damages shall be recorded and notified to the concern party for further action.

Generator & ATS shall be covered with polythene sheets to protect from dust and moisture.

4.2.1.1 Installation Procedure:

Specification sheets will be checked for the dimension & weight of the generator sets and mounting points.
DG set of both ratings will be mounted on a concrete plinth.
Installation locations will be as per approved shop drawings.

Flexible exhaust tubing will be connected to the engine to take up thermal expansion and generator set movement and vibration.
Exhaust silencer shall be mounted so that the engine does not support the weight of the silencer.
Flexible tubing will not be used to form bends or to compensate for misalignment of piping.
Mufflers and piping will be supported by Non-combustible hangers or supports.
Precaution shall be taken to rule out any possibility of combustible material coming in contact, close to the exhaust piping. Approved non-combustible material shall be used where exhaust piping pases through combustible walls or ceiling etc.
Horizontal runs of exhaust piping will be sloped downwards away from the engine to out of doors to avoid condensate water entering engine.
Installation will be as per approved shop drawings.
Exhaust pipe opening outside the building shall be arranged to avoid entry of rainwater and shall be fitted with bird guard.
On confirmation of the routing of the exhaust pipe, the number of bends & length will be communicated to the manufacturers & suitable diameter of exhaust pipe will be selected for minimum back pressure.

Intake and exhaust air louvers will be sized and located to provide sufficient intake air for engine combustion and to provide required airflow through the radiator.
Duct work with flexible connecting section will be sized and located to provide sufficient intake air for engine combustion and to provide required airflow through the radiator.
The allowable pressure drop will be checked with the manufacturer after confirming the layout and will informed to the louver supplier / manufacturer, for co-ordination purposes.

4.2.2 ATS :

Ensure approved documents like shop drawing, electrical room layout are available with the installation team.
Check the label/marking to ensure that it is the right panel and check the position according to the shop drawing.
Terminate the incoming and outgoing cable as per single line diagram using proper tools.
Megger the panels after connecting the compartments.
Megger the cables before terminating.
Megger the panel after termination.
Clean the termination and ATS panel with vacuum cleaner and hand brush to clean the dust and small metal pieces fallen during cable cutting and terminating process.
Provide identification for all the cable termination as per specification requirement.
Dress the cables neatly with cable ties / cable cleat.
Double check the connections by tightening the terminations.
Inspection shall be offered for QC Verification.

5.0 Records

QC Inspection Check List.
- Inspection request duly signed-off by NMX and Consultant.

6.1 Inspection Check List for Generator & ATS.