Method Statement Title: Installation of Motor Control Centre ( MCC ) & Variable Frequency Drives ( VFDs )
1.0 Scope
This method statement details the method of installation of Motor Control Centres and Variable Frequency Drives, as per project Specification Sections 16472 and 15725.
Note: A separate Method Statements shall be submitted for testing and
commissioning.
- MCC’s ( Ref : ETA / MS / E – 30 )
- VFD’s ( Ref : ETA / MS / E –31 )
2.0 Material
- All panels / materials / components shall be as per approved material submittals.
- Panel dimension, arrangement and control sequencing shall be as per approved drawings.
2.3 Ensure the panel is factory tested and verify test reports.
3.0 Applicable Location
3.1 MCC’s at Tower E1,E2,E3 & W1,W2,W3 Plant Rooms.
3.2 MCC’s & VFD’s at East & West Podium Heat Exchanger Room.
4.0 Method
4.1 Storage
4.1.1 All components / materials received at site shall be inspected and ensured against approved material submittal.
4.1.2 Any discrepancies, damages etc. shall be notified immediately for further action.
4.1.3 MCC Panel / VFD’s shall be carefully unloaded from the vehicle using Crane / Fork lift and moved to suitable place for storage.
- Items found not suitable for the project shall be removed from site immediately.
- MCC Panel / VFD’s shall be stored in a covered place separately as per manufacturer recommended ambient condition.
4.1.7 MCC Panel / VFD’s shall be covered properly to prevent dust and contamination.
4.2 Installation
4.2.1 Shift the panel from stores to the installation spot using fork lift.
4.2.2 For floor mounted panels, the exact location of the panel and fixing holes to be marked on the concrete plinth provided by others for the installation.
4.2.3 Remove the packing and ensure that the panel is free from transportation damages.
4.2.4 For wall mounted panels, the exact location of the panel and fixing holes to be marked based on approved shop drawing keeping panel in place and will be fixed in an approved manner.
4.2.5 Position the panel on the plinth and align properly.
- Anchor the panel as required and ensure it is fixed securely to the plinth, as per approved drawings.
- Terminate the incoming and outgoing power and earthing cable as per approved single line diagram ( SLD ) using proper tools.
- Conduct insulatio tests to ensure the healthyness of the panels.
- Provide proper access around the panel for future maintenance.
- Ensure the services containing water are away from the panel .
4.2.11 Identification of panel and outgoing breaker shall be verified against approved shop drawings.
4.2.12 Incoming and outgoing cables shall be marked / identified as per approved shop drawings.
4.2.13 All components of the panel such as MCCB, MCB, Relays, Fuses, Meters, CT’s, Contactors, Terminals, etc. shall be verified against the approved panel internal drawing for correct rating and size.
- Any internal connections / modifications will be carried out by the Manufacturer’s representative.
4.2.15 All breakers (incoming / outgoing) shall be in “OFF” position and to be locked to prevent mishandling.
4.2.16 Check and ensure adequate space is available for maintenance.
4.2.17 After installation panel shall be properly cleaned and protected with plastic covers to prevent from dust and contamination until commissioning time.
4.2.18 Inspection request shall be raised for Consultant’s and NMX inspection.
5.0 Records
- Signed-off Installation Check List will be attached to final inspection request.
- Inspection request duly signed-off by NMX and Consultant.
- Caliberation certificates of Megger.
- Attachment
6.1 Installation check list format for MCC’s and VCD’s.
