SCOPE OF WORK KNOWLEDGE:

The scope of work is as follows:

  • The works associated with the wood pole replacement is identified and marked rotten Class 3 and Class 4 wooden poles on the LV, 11kV, 22Kv & 33kV overhead networks in the North West Operating Unit.
  • The works associated with the live work maintenance is identified, in the line inspections for 11kV, 22Kv & 33kV overhead networks in the North West Operating Unit
  • Supplying of labour, appropriate live work working platform, live work equipment, transport, vehicle mounted crane and material (when necessary), for live work within the North West-OU, to replace identified and marked rotten wooden poles and identified line components that are faulty through line inspection , using live work gloving method. The material that will be procured by the Contractor should be from a local Eskom approved supplier. Written approval should be obtained from the Employer’s representative, prior to the procurement of material.
  • The work covered in the contract comprises the establishment of a working site at the identified work area, safekeeping of Eskom supplied equipment, installation, testing where applicable, and handing over in working order.
  • All wooden poles will be stored, transported and handled as per Eskom procedure, DPC 34-1475.
  • Holes will be excavated as per Eskom standard, DST 34-1191, for appropriate pole diameter and length.
  • No holes excavated and not used, will be left open and unprotected / uncovered. No holes will be opened in advance.
  • The compacting of poles will be done according to Eskom specification DSP 34-1657. Wooden poles are not to be planted with concrete to the bottom of the pole as this practice promotes pole rot, concrete wever may be used as a ring.
  • The conductor height as stipulated in Eskom standard DST 34-1191, will be adhered to at all times. Where this conductor height, all three phases, is influenced, corrective action will be implemented to ensure that the required conductor height, as specified in the Eskom standard, is reached and maintained at all times.
  • All Wishbone configurations will be replaced with Delta bird friendly structures with a 1.7m steel X-arm and suspension insulators. T-top Delta configurations will be replaced with the same configuration accept the X-arm will be a steel X-arm.
  • The changing of identified and marked rotten wooden poles consist of:

3 Phase Wishbone structure to be replaced with 3 phase Delta bird friendly structure with steel X-arm and suspension or strain insulators as per drawing:

Suspension 0 deg D-DT- 1870

10 deg D-DT 1871

Strain D-DT- 1808 for Fox conductor

D-DT 1809 for Hare conductor

3 Phase T-top Delta with insulators on top to be replaced with 3 phase T-top Delta and post insulators installed on top of steel X-arm as per drawing:

Intermediate 0 deg D-DT-1804 (p2) with D-DT-1870 for installation of steel

X-arm with post insulators on top.

Strain D-DT-1805 (p2) with D-DT 1808 for installation with steel X-arm for Fox

conductor

D-DT-1805 (p2) with D-DT-1809 for installation with steel X-arm for Hare

conductor

3 Phase H-pole structures, one pole or both, to be replaced as required with one pole or both as per drawing. This will be for road and railway crossings where applicable as well:

D-DT-1763 for Fox conductor

D-DT-1767 for Hare conductor

60 deg: D-DT-1764 for Fox conductor

D-DT 1768 for Hare conductor

90 deg: D-DT-1766 & D-DT-1806 for Fox conductor

D-DT-1769 & D-DT-1807 for Hare conductor

The detailed maintenance work

  1. REPLACING INSULATORS ON INTERMEDIATE A-FRAME CONFIRUGATIONS (GLOVING)
  2. CHANGING PIN/POST INSULATORS ON VERTICAL AND STAGGERED VERTICAL STRUCTURES (GLOVING)
  3. CHANGING PIN/POST/SUSPENSION INSULATORS ON HORISONTAL/DELTA/H-POLE/SCF/WISHBONE/DITE CONFIGURATION (GLOVING).
  4. CHANGING STRAIN INSULATORS ON VERTICAL STRUCTURES (GLOVING)
  5. REPLACEMENT OF STRAIN INSULATORS ON A A-FRAME CONFIGURATION (GLOVING)
  6. STRAIN INSULATOR CHANGE ON HORISONTAL/DELTA TYPE CROSSARM CONFIRURATIONS
  7. CHANGING POLE/SUSPENSION INSULATORS ON VERTICAL ANGLE STRUCTURES (GLOVING)
  8. CHANGING INTERMEDIATE POLES/CROSSARMS ON HOSIISONTAL/DELTA CONFIGURATIONS (GLOVING)
  9. CHANGING/CONVERTING A WISHBONE SUSPENSION POLE
  10. REPLACEMENT OF WISHBONE CROSSARMS (LIVE WORK)
  11. CHANGING INTERMEDIATE TO IN-LINE STRAIN POLE ON A VERTICAL STRUCTURE (GLOVING)
  12. REPLACEMENT OF A WOODEN INTERMEDIATE POLE WITH OR WITHOUT CROSS ARM ON A –FRAME CONFIGURATION (GLOVING)
  13. CHANGING CROSS-ARMS ON SCF/H-POLE WOODEN POLE STRUCTURE ON 11KV AND 22KV LINES UTILISING APPROVED SPREADER BAR
  14. REPLACEMENT OF SINGLE/DOUBLE WOOD POLE ON H-POLE CONFIGURATION (GLOVING)
  15. CONVERTING INTERMEDIATE TO STRAIN POLE ON HORISONTAL/DELTA H/POLE/SCF CONFIGURATION
  16. CONSTRUCTION OF A T-OFF/CUSTOMER CONNECTION FROM A VERTICAL STRUCTURE (GLOVING)
  17. MAKING/BREAKING OF JUMPERS (GLOVING)
  18. INSTALLATION/MAINTENANCE OF DROPOUT FUSE LINK/GANGED ISOLATORS ON VERTICAL STRUCTURES (GLOVING)
  19. MAINTENANCE OF COU OUT FUSE LINKS/ GANGED ISOLATORS(IN-LINE STRAIN OR T-OFF) USING GLOVING
  20. REPLACEMENT OF A FULL/NON-TENSION REPAIR SLEEVE/SPLICE (GLOVING)
  21. REPLACING A SECTION OF CONDUCTOR (GLOVING)
  22. INSTALLING AND REPLACING POLYMERIC SURGE ARRESTORS ON MV NETWORK (GLOVING)
  23. INSTALLATION OF BIRD FLAPPERS/FAULT LOCATORS/ALARMS (GLOVING & STICK METHOD)
  24. INSTALLATION REPLACEMENT OF STAY INSULATORS (GLOVING)
  25. PREPARATION OF PIGGYBACK SYSTEF FOR LIVEWORK MAINTENANCE (LIVEWORK)
  26. CUTTING AND REMOVING A SECTION OF DOWN-RUNNING EARTHWIRE ON WOOD POLE STRUCTURE TO INCREASE THE B.I.L (GLOVING)
  27. PRUNING OF TREES
  28. SPRAY WASHING OF INSULATORS
  29. STRINGING CONDUCTORS OVER ENERGISED LINES 11 KV TO 132 KV USING LIVE WORK METHODS
  • Eskom will supply and deliver required poles and relevant hardware and equipment at the Contractor’s established site. It is the responsibility of the Contractor to transport the appropriate poles, hardware and relevant equipment from the Contractor’s site to the place of work.
  • Work will be done as per issued Maximo work order, issued by appropriate CNC and closing of the work order on a weekly base, will be done by the appropriate CNC only when work was inspected and found to be according to contract.
  • All work must be executed under live conditions by applying of accepted and authorised Eskom live work task manuals and technical instructions for gloving method.
  • No conductor displacement is to be done where conductor smaller than Fox is installed.
  • Where a non-live work person is utilised to operate the vehicle mounted crane during the pole plant operation, this person should be certified to have been attending an authorised live work appreciation course.
  • Poles that is being changed will be numbered with the original pole identification number as per Eskom standard DST 34-1439, Standard for the labelling of substations and networks.
  • No wooden pole will be cut to a desired length. Appropriate pole will be used with the correct length.
  • An oil spillage kit will be available on site. Any environmental incident shall be reported to Eskom within 24 hours after occurrence.
  • Inform land owners in adherence to ACCESS TO FARMS (INCLUDES STRATEGY ON DEALING WITH GAME FARMS) as per Eskom standard 34-190
  • Eskom or its appointed representative, behold the right to do an onsite inspection for quality, safety and adherence to scope, without prior arrangement, on intervals as needed or determined by Eskom.
  • It is not suspected to work overtime and therefor no overtime rates can be claimed. If it became necessary for the Contractor to work overtime to catch up on lost work because of his or his employees fault, the remuneration of such overtime will be for the Contractor’s account.
  • Eskom will be informed in advance when the supplied poles, hardware and equipment are reaching a low level, for replenishment.
  • The claiming of remuneration for standing time will only be allowed if Eskom is at fault e.g. if a shortage of required material is experienced.
  • Only work related kilometres can be claimed on submitting a vehicle log sheet for the following:
  • Site inspection and preparation

1 x LDV

1 x Truck

  • Executing scope of work

1 x LDV

1 x Live work vehicle

1 x Truck equipped with a vehicle mounted crane.

1 x Vehicle with a ground auger