 DESIGN ERECTION COMMISSIONING CAPABILITIES I. Switch Yard
- Switch yards of various types of switching schemes and finalization of single line diagram.
- Survey and investigation of land, considerations of orientation of lines and taking out block levels.
- Formation of site plan/plot plan for most economical finished grade levels
- Finalization of switch yard plan and cross section.
- Detailed bill of quantities for all equipments and materials
II. Technical Specifications
- Preparation of technical specifications with all parameters and references for all IS/IEC standards for equipments and materials
- Circuit breaker, isolator, instrument transformer, lightning arrestors, power transformer etc involving;
- Sizing of the equipment
- Various electrical parameters like BIL, short time current capability, continuous current rating etc.
- Method of construction.
- Control and Protection Panels
- Type of main schemes and back up schemes for protection schemes
- Type of control schemes
- Formation and type of panels
- Measurements of parameters
- SCADA compatibility and type
- Design of cable schedule and method of laying
- Auxiliary Systems
- Battery and charger-sizing of the equipment based on the measurement and protection devices, configuration of charger and DC distribution board.
- AC distribution board/panels–sizing and configuration feeders and scheme.
- Switch Yard Materials
- Steel structures – Design and configuration of columns & beams , design of equipment support structures
- Bus bars-Type of material viz., aluminum pipe, AAC or ACSR conductor, sizing based on power handling capacity and mechanical strength
- Insulators- Configuration based on electrical properties and mechanical strength
- Clamps & Connectors- Configuration and types
- Control and power cables – Sizing, selection of type of cable and insulation
- Preparation of technical specifications for all works both civil and erection of sub-station
- Preparation of technical specifications for testing and commissioning.
Control Building
- Configuration with dimensions
- Design of foundation and super structure.
- Foundation details for various equipments
Civil Works
- Design of economic levels
- Design of foundations viz., for power transformers, station structures equipment support structures etc.
- Design of cable duct
- Design of drainage system
- Design of roads & associated culverts
Lightning Protection
- Selection of type of protection
- Configuration
Illumination
- Design of illumination levels for switchyard and control building.
- Design of type of luminaries and location.
- Design of supports for luminaries.
Procurement of Equipments/Materials
- Obtaining vendor approval
- Floating the tenders and finalization
- Obtaining approval of drawings
- Arranging inspection and supplies to site
Erection
- Erection of station structures and equipment support structures and equipments like power transformer, circuit breaker, isolator etc.
- Laying of earthmat and connecting earthmat to equipments and structures.
- Formation of Bus- Main and jack Bus.
- Connecting Bus to equipment and inter equipment connection
- Formation of cable duct, drainage and roads
- Construction of control building and erection of indoor equipments
- Laying of cables and termination
Testing and Commissioning
- co-ordination of various suppliers and getting the equipments tested
- verification of all connections and terminations
- commissioning of sub–station
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