APPENDIX C FACILITY ILLUSTRATION

APPENDIX C FACILITY ILLUSTRATION

21m 21m 21m 0m 5.4m 3.5m access road (allow for water management on sides) Future Expansion 20m 24.5m 61m 49m 69m 20m Future Expansion 5m 100m 4.3m 9m 100m Space for MV lines 125m Removable panels for vehicle access Proposed MV line routes from substation (lines not to cross each other) Notes: - Space needed for cut & fill should be added to this when needed - Position of oil holding dam dependant on the slope of the site - Actual substation position on site is dependant on access route direction - Layout to be flipped horizontally and/or vertically on site as needed. 150m

Scope of work Mbumbu Traction Build Mbumbu132kV Switching Station as follows Extend Mbumbu traction by 12m of the South side,11.8m on the West and 14m on the East 4x132kV Feeder bays 2ET-1505s1 Power VT's - complete set of 3 on Switching Station(Mbumbu B/B) Reposition the existing 132kV VT on Switching Station(MbumbuB/B) Build standard Control room 2ET-14904 11

Scope of work Mbumbu Traction continues Electrical Design Fault levels below includes the following in place Description Breaker Isolator Equipment Current Transformer Cont 3 Sec Cont 3 Sec Cont 3 Sec Voltage Voltage 132kV HV Feeder bay 3150 A 40 ka 2500 A 40 ka 2500 A 40 ka 132 kv 145 kv VT SA 12

Proposed Mbumbu Switching station SED 13

Hazyview SW/S Acornhoek MTS 14

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Mbumbu Traction GA after extension 16

Existing Mbumbu Traction - South view 17

Proposed Mbumbu Switching Station South view 18

Mbumbu Traction - West view 19

Proposed Mbumbu Switching Station West view 20

Scope of work Tsakani Substation Build Tsakani substation HV yard by installing the following 80m Access Road 1 X 132kV feeder bay at Tsakani substation 2-ET-1505s1 132kV Feeder Bay Line Conductor Line bay Conductor Tube Chicadee Centipede Tube AL 120mm 0D x 4mm THK 6m L Sectionalized Busbar 2-ET-15106s1 132kV Feeder Bay Line Bay Conductor Busbar Tube Conductor Centipede Bull Tube AL 120mm 0D x 4mm THK 12m L HV transformer bay 2-ET-15107s1 Transfomer Bay Stringer Conductor Centipede 21

Scope of work Tsakani Substation Cont.. MV Transformer Bay 2-ET-15108s1 MV Transformer Bay Stringer Conductor TUBE 132/22Kv 2x20MVA BULL 112MMXOD120MM X10M;AL MV Box Bus bar 8Bays without Bus Section Breaker 2-ET-15109s1 22

Scope of work Tsakani Substation Cont.. 4X22kV feeder bays D-DT 2-ET-15110s1 MV Feeder Bays 22kV Emergency rating(50 C) Amps MV Feeder bay MV Line Isolator 22kV Knife Links Conductor Conductor Hornet Hare 400A 12KA 400A 12KA 457 292 Install Camera s in the substation Install remote oil holding dam Install lightning/lightning masts Erect palisade fence 23

Scope of work Tsakani Substation continues Civil Design - Terrace and Drainage design will be finalised on the detailed design. - Preliminary desktop study done 2012/08/10 - Geo-tech desktop study report still need to be done. Relay House Design Build a standard control room as per standard 2-ET/14904. Cable Trenches Prepare Substation cable trenches as per standard 2-ET/14911 Substation Fence Build 67 X 47m of 2.4m with steel electrified palisade fence as per standard 2-ET-14899 inside the 100m x 100m Substation servitude with 2 X removable panels and 2 X gates Earthing -Earthing shall be in accordance with SCSASABF9 standard 24

Scope of work Tsakani Substation Cont.. Earthing -Earthing shall be in accordance with SCSASABK2 standard Electrical Design Fault levels derived below includes the following in place -The Substation design will be for a 2X20MVA 132/22kV substation -The 18km 132kV Chickadee line From Mbumbu switching station to Tsakani substation Location Phase Fault HV (132kV) MV (22kV) 1 trf s 1φ 3φ 1φ 3φ 2.140kA 2.860kA 360A 4.02kA MV(22kV) 2 nd trf s 1φ 720A 3φ 6.51kA 25

Scope of work Tsakani Substation Cont.. Equipment ratings versus fault current Equipment Description Breaker Isolator Current Transformer VT SA Cont 3 Sec Cont 3 Sec Cont 3 Sec Voltage Voltage 132kV HV Feeder bay 3150 A 40 ka 2500 A 40 ka 2500 A 40 ka 132 kv 145 kv 132kV HV Transformer bay 3150 A 40 ka 2500 A 40kA 2500 A 40 ka 132 kv 145 kv 22kV MV Transformer bay 1250 A 20.0 ka 2500 A 25.00 ka 2500 A 16.00 ka 22kV 24kV 22kV MV Feederbay 1250 A 20.0 ka 2500 A 25.00 ka 2500 A 16.00 ka 22kV 24kV Voltage Trfr Rating Impediance HV (kv) LV (kv) MVA %Z Input 132 22 20 10.00% HV Fault Levels 3 Phase 1 Phase Input 2.860 ka 2.140 ka MV Fault Levels 3 phase 1 phase 1 trfr 4.02 ka 360 A Input 2 trfr 6.51 ka 720 A 3 trfr's 8.21 ka 1080 A 4 trfr's 9.44 ka 1440 A 5 trfr's 10.38 ka 1800 A 6 trfr's 11.11 ka 2160 A 26

Proposed Tsakani s/s SED 27

Substation site layout and line route 28

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