Project Name: Premier Diamonds 88/3,3/6,6 kV S/S Project ID: NE-RFM-1 107-2772

1. Project Name:Premier Diamonds 88/3,3/6,6 kV S/S Project ID:NE-RFM-1107-2772 Presented by: Charles Cudjoe Date: >>>TEF Date<<<

2. Eskom Values • Zero Harm • Integrity • Innovation • Sinobuntu • Customer Satisfaction • Excellence

3. Contents • Decision Required • Previous TEF Comments • Problem Statement • Related Projects • Project Schedule • Load Profile • Geographical Location • SHIM – Register, Comments & Minutes • Design Alternatives Considered • Network Performance • Existing & Proposed Single Line Diagram • Existing & Proposed Substation General Arrangement • Existing & Proposed Network Diagram • Control Plant Scope of Work & Control Room Layout • Power Plant Scope of Work • Site Plan • Material Selection • DRA Decommission Input Sheet • Project Costing Detail • Customer Contribution calculations • Financial Analysis • Risk and Mitigation Strategy • Long Lead Materials • Proposed Method of Implementation / Sequence of Construction Events • Network Performance during construction • Environmental Summary • Technical Information

4. 1. Decision Required • The TEF is hereby requested to approve the technical content of the preliminary designs for the following project/job. • The TEF is also hereby requested to support the submission of the following project/job to the IC for financial approval.

5. 3. Problem Statement • Provide what triggered the project: • Substation is approximately 48 years old. • The substation configuration is non-standard with no metering on the Eskom side. • Earthing on Isolators/Structures are missing posing a danger to operators. • All operating labels are not to standard. • Large oil volume breakers and old isolators are redundant. No spares available. • The 88 kV VT`s are oil type and leaking. • Substation fence is beyond repair • Flooding and soil build up in sub yard • Trfr DP values are low & some are PCB contaminated • Block house still housing 3,3kV busbars (Safety concern)

6. Supporting evidence

7. Supporting evidence

8. Supporting evidence

9. Supporting evidence

10. Supporting evidence

11. Supporting evidence

12. Supporting evidence

13. Supporting evidence

14. Supporting evidence

15. Supporting evidence

16. Supporting evidence

17. 5. Project Schedule • Provide information on the causes of any delays of the project. • State if there are other dependencies such as Environmental, Land Acquisition, etc.

18. 6. Load Forecast Double Click to edit.

19. 6. Load Forecast

20. 7. Geographical Location Mark where the project is taking place. Show places others can use to orientate themselves such as major roads, cities and substations. Show the scale.

21. 7. Geographical Location

22. 8. SHIM – Stakeholders Invited, Register, Comments & Minutes The recorded minutes of the Stakeholders Input Meeting, and the actual comments of all Stakeholders must be captured at the Stakeholder Input meeting, scanned and included in the TEF presentation.

23. 8. SHIM – Stakeholders Invited, Register, Comments & Minutes

24. 8. SHIM – Stakeholders Invited, Register, Comments & Minutes

25. 9. Design Alternatives Considered Please indicate the preferred one

26. 9. Design Alternatives Considered Option 2 is the preferred one

27. 10. Network Performance – Historical and Existing

28. 11. Existing Single Line Diagram

29. 11. Proposed Single Line Diagram

30. 12. Existing Substation General Arrangement

31. 12. Proposed Substation General Arrangement cont.

32. 13. Existing Network Diagram Bynes 88kV Bynes 132kV Bynes 132kV & Esselen 88kV network

33. 14. Control Plant Scope of Work

34. 14. Control Plant Scope of Work Cont.

35. 14. Proposed Control Room Layout

36. 15. Power Plant Scope of Work • Give a description of the work to be done: • Specify new equipment, its size and quantity. • Specify equipment to be decommissioned. • Specify changes in network configuration. • Separate the work that is covered by the customer from the work to be done by Eskom.

37. 15. Power Plant Scope of Work HV Side • Replace all (8) 5MVA trfr`s(double banked units) with (2) single 20MVA units • Replace 88kV VT`s on Busbar • Replace WOD`s switches with 132kV Breakers on Tfr1-4 • Replace all Isolators including bus sections with new double break 132kV units • Replace 88kV busbar Conductor to standard Bull conductor • Install new 132kv bkr on 88kV Zonderwater incoming line with Stats metering. • Move all line surge arrestors to busbar side of line isolator • Replace all surge arrestors on Trfr`s 88/6,6/3,3 kV • Replace all 88kV incoming cables with overhead lines MV Side • Install new 3,3 kV (6,6kV) feeder cable supports • Install new 11kV Isolators on 3,3kV side for isolation between Eskom and Customer • Install new 11kV transformer kiosk breakers and Vt`s for protection and metering on 3,3kV side • Construct MV transformer bay according 2/ET-15108

38. 15. Power Plant Scope of Work cont. Civil & other Work • Build a bund wall around all Transformer plinths • Install an oil holding dam • Build a retaining wall to prevent flooding • Replace bolted connections with crimp connections. • Test earth mat and repair if necessary • Replace all equipment labels. • Replace yard overhead screening wire to Hare conductor • Install yard lights • Replace fence with steel welded galvanised fence enclosing control room • Replace the roof of the control room • Supply 9 sets of 10kA earth/applicator sticks with lock-up box (2-Et/14904) • Repair Control room and install Desk(2-ET/14904) • All indoor bus bars, isolators, panels are to be removed. New trfr panels move to control room

39. OPTION1 NEW SUB Route directly to Potch DS ZETA POTCH DS 16. Site/Route/Township Plan • Lines and Cables: Provide geographical layout of the route showing other mapping details such as roads, erven, rivers, wetlands, contours, etc. • Substations: Provide geographical layout of the substation site showing other mapping details such as roads, access, private properties, rivers, wetlands, contours, etc. • Developer and Electrification: Provide the development layout with respect to existing network.

40. 16. Site/Route/Township Plan

41. 17. Materials Selection The purpose of this slide is to compare load and fault level requirements to material selection.

42. 17. Materials Selection Note: A cable will go out from the s/s to the customer’s common point of connection

43. 18. DRA Decommission Input Sheet Use ‘Print Screen’ to copy this table.

44. 18. DRA Decommission Input Sheet Use ‘Print Screen’ to copy this table. WRONG FORMAT!

45. 19. Project Costing Detail PROVIDE HIGH LEVEL SCOPE FOR EACH JOB

46. 20. Customer Capital Contribution Calculations STATE N/A IF NOT REQUIRED • Provide the breakdown of customer capital contribution calculations. • Provide the basis in which percentage contribution is based upon.

47. 21. Financial Analysis/PEM • Provide FEM Assumptions • FEM is required for all projects that are: • For strengthening and refurbishment. • For direct customer and the customer is not paying the full project cost. • For electrification and the DOE is not paying the full project cost. • Even FEM’s with negative NPV need to be presented.

48. 22. Risk and Mitigation Strategy • Indicate if the mitigation is an allocation of funds in the contingency to cater for the uncertainty factor • Is this amount also in the financial budget for the year • If applicable reduce or increase the number of risks

49. 23. Long Lead Materials – Primary Plant

50. 23. Long Lead Materials – Control Plant