Explain in detail the steps that must be taken to ensure that the task is carried out safely (include drawing and sketches where required, include pre commencement of work activities and the work itself in a chronological manner)
A. Verify IFC drawings availability
B. Verify Documents for QC material receiving inspection
C. Mobilization of equipment
D. Transport of materials loading & Unloading
E. LV Panels Assembly and Installation
LV Panels Installation Procedure and Method Statement
PURPOSE
This procedure covers the Method Statement pertaining to installation of low voltage panels to be carried out in Solar Combined Cycle Power Plant Project. This procedure shall be applied to the
method and criteria for installation work carried for panels, cabinets, cubicles for services such as lighting and small power. Field installation personnel must verify the feasibility of this procedure with the approved construction drawing, actual site condition and project specification.
REFERENCE STANDARDS
• IEC International Electro-technical Commission
• NEC (NFPA 70) National Electrical Code
• Project and Manufacturer’s Specifications.
• Project Technical Specifications
• Applicable/ Approved International Standards
• Approved/Issued for Construction Drawings
RESPONSIBILITY
The Site Manager
• Responsible for the Quality Procedure to ensure that construction work is carried out as per Project requirements. His Superintendent/Supervisor shall check that work is ready for inspection and prepare Internal Inspection Request. The Superintendent/Supervisor shall inform all parties concerned for any of inspection and the time schedule.
The Quality Control Inspector
• Responsible for conducting surveillance and inspection duties for work and ensuring quality compliance and efficient recording and reporting of results as required. He shall review all relevant documents, material conformance certificates and non-conformance reports and shall receive all internal requests for inspection from various sections of implementing work and prepare (RSI) Request for Site Inspection as per schedule work priorities and proceeds with the Quality inspection with the client, owner representative as required. He shall also prepare Witness / Hold Point inspection and the corresponding work releases by reviewing records and results as proof that work inspected conforms to contract requirements. He shall also be responsible to ensure that an approved detailed IFC/ AFC or shop drawing is available prior to commencement of the work and all materials to be used are in compliance with the approved project specifications or requirements.
Field Engineer
• Ensure that all related works are carried out in accordance with approved Issued for Construction drawings,
specifications, schedule, quality and safety. Check Design and Construction details in reference with the project standard and specification. See to it that the design drawings provide adequate information for purchasing and site construction. Report to Site Manager.
Electrical Superintendent
• Ensure that work once started is carried out as planned and that the applicable standards are complied with. Check working methods and precautions to be taken by the supervisors/foreman before commencing work. In charge of planning and preparation of manpower, materials, tools and equipment together with his supervisors prior to start of any activity. Monitors project completion schedule and the discipline supervisors under him.
Discipline Supervisor
• Leads field installation and monitor his work unit and assigned activity. He ensures that work activity will be according to project specification and approved construction drawing. Oversee quality of construction works and ensure that HSE policy and requirements are followed at all times. Report to Electrical Superintendent.
HSE Officer
• Supervise the project activities relating to health, safety and environmental compatibility. He shall carry out regular inspection at site and workplaces whether work is being carried out according to the given instructions and those personnel are wearing the necessary protective equipment (PPE). Perform, in co-operation with the Site Supervisors and Foremen regular Tool Box meetings. Report any adverse condition to health and safety.
MATERIALS AND CONTROL
• Ensure that materials and equipment are stored and handled properly and prevent any damage during handling and transport.
• Check all supplied materials are in conformance with Purchase Order or Specifications or Drawings. Any discrepancies shall be reported immediately to ABENER.
• Store LV panels & other associated components on dust free area and protect them against atmospheric action and dirt preferably in air conditioned room to prevent damages of electronic components part.
• Where applicable, space heater must be energized during storage period to prevent damage to components due to condensation and negative accumulation.
LV PANEL GENERAL REQUIREMENTS
• LV panels shall be installed on the location as statede in issued approved for construction drawing and other equivalent Project specifications.
• Compare equipment nameplate data with drawings and specifications.
• Base plate, floor fixing, wall fixing etc. shall be checked for level and location and fixing points checked against their position on the respective sections. Cable sleeves and ducts shall be inspected to verify location and alignment of drops.
• Before installing in position, panel will be opened up and inspected for cleanliness and ensure no foreign bodies are present. Dust shall be removed using a vacuum cleaner or with rags as appropriate.
• Installation shall be witnessed to ensure the equipment is vertical and fixing bolts tightened. Where equipment consists of a number of sections, the assembly shall commence from the control section. Section on either side of the center shall be alternated, levelled and shimmed as necessary
• L V panels earth bars will be connected to the main earthing grid at each end of the equipment.
• Wires shall not be jointed or teed between terminations. All wires shall be clearly identified at each end. The same identifier shall not be used on wires in different circuits on the same section.
• Stranded conductors will be terminated accordingly; larger conductors will use an approved crimped termination lug.
• All exposed terminals and cable terminations will be shrouded using a transparent non-flammable material to prevent accidental contact.
LV PANEL INSTALLATION
WORK SITE PREPARATION PRIOR TO INSTALLATION
• General assembly and manufacturer’s instruction must be considered when transporting the equipment.
• When transporting the equipment to work site, ensure that equipment is firmly secured on the trailer/truck.
• Handling, loading and unloading of L V panels must be performed by a competent rigging crew and performed in accordance with the company’s safety requirements.
• Dimension and weight of the equipment will be considered in selecting the lifting equipment needed for the activity. All lifting equipment especially crane which is usually used for lifting activity must follow the safety requirements of the project.
• Equipment will be lifted through the lifting members that are usually bolted to the top of packaging group.
• Outdoor lifting activity with crane must not be done during bad weather condition. All lifting activity must follow the safety requirement initiated by HSE department.
• Check that loading and unloading area has enough space for the activity.
• It is advised that packaging should be opened only during installation at the area. During unpacking and removal of wooden boxes, physical and visual inspection shall be conducted to check for damages, dent and paint finishes.
• Panels are lifted through the lifting bolt. When not provided, slinging through the pallet using stand-off protection at the top corners to space the slings correctly and prevent chafing of paintworks during lifting. Observe proper and safe lifting when panel are manually moved, handled or transported.
Caution: Cubicles may easily tip over, when transported with pallet jack, observe safe allowable distance between pallet and the ground
LV PANELS INSTALLATION PROCEDURE
- Area must be prepared; required warning sign and barricade the area. Unauthorized person must not be allowed at the activity area.
- Inside substation, safe practices for shifting and lowering of panels from pallet jack shall be observed. A void using metallic levers to protect paint finishes.
- Remove barrier bags and loose items of panels. Check for cleanliness and ensure that no foreign bodies are present inside.
- Required assembly shall be according to manufacturer’s lay-out drawing. Set them in the position called for on the drawing of the base plan. Installation must be aligned and securely fixed.
- Support required for wall mounted panel will be according to lay-out drawing and reference dimension from panel. Support must be leveled and secured with complete fastener, bolts or hardware.
- Use a spirit level to make sure levelling along its length. Plumb using a plumb line.
- Panel to be installed on floor or concrete pad must be securely fixed with fasteners/hardware. Alignment must be observed at all times.
- Auxiliary wirings and accessories removed during shipment must be reconnected in reference with the manufacturer’s assembly and interconnection lay-out drawing
- All bus bar bolts will be checked for tightening and torque tested as required as per manufacturer’s recommended torque setting.
- Remove all the shipping blocks or braces. Examine all the meters, relays, etc. and remove any shipping blocks or braces.
- Breakers, starters, and miscellaneous devices can be mechanically exercise to assure that the equipment is suitable for electrical energization.
- Temporary protection should be provided to protect equipment from adjacent on-going construction works.
- Keep the panel closed and secure after installation.
LOW VOLTAGE PANEL INSPECTION
• Quality Control personnel verify that assembly and installation of panels conforms to the approved engineering drawing, manual instructions and specifications of the project. RSI shall be prepared according to the approved Inspection and Test Plan to notify Client’s inspection representative and concern person regarding scheduled dates of inspection. Once inspection is done and accepted, inspection report must be signed and records are properly kept.
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