1. Single Line Diagram (SLD) 2. Preparation of layout plan & section drawing of substation. 3. Preparation of Electrical Clearance diagram. 4. Preparation of erection key diagram (EKD). 5. Earth-mat Calculation & Design, Earthing Philosophy. 6. DSLP Calculations Layout. 7. Illumination calculation and Layout. 8. LT AC & DC Single Line Diagram. 9. LT AC & DC Power Cable Schedule. 10. Control Room Panel Arrangement Plan. 11. Trench Layout & Cable Laying Schedule. 12. Panel Arrangement Layouts. 13. Battery & Battery Charger Sizing Calculation. 14. SCF & Sag Tension. 15. Tender Engineering & Estimation of Lot Items BOQ. 16. Preparation of Technical offer, Prebid Query for Tender.