TECHNICAL SPECIFICATIONS For Procurement of Isolators ...

1 THE KENYA POWER AND LIGHTING COMPANY LIMITED. KENYA ELECTRICITY EXPANSION PROJECT. DISTRIBUTION REINFORCEMENT AND UPGRADE. TECHNICAL SPECIFICATIONS . For Procurement of Isolators , Insulators and Surge Diverters for 66kV, 33kV & 11kV Lines ICB No: KPLC1/6E/2/A11. (IDA- Credit). VOLUME II. Part 1 Bidding Procedures Part 2 Employers Requirements Part 3 Conditions of Contract and Contract Forms April 2011. 2. Kenya Power and Lighting Co Ltd Section VI Schedule of Requirements Kenya Electricity Expansion Project TECHNICAL SPECIFICATIONS Contents SECTION I GENERAL SPECIFICATIONS1 GENERAL SPECIFICATIONS .. 3. 1 GENERAL SPECIFICATIONS .. 4. SCOPE OF WORKS: .. 4. DESCRIPTION OF THE PROJECT.

2 4. STANDARDS .. 4. UNIT OF MEASUREMENT AND LANGUAGE .. 4. SERVICE CONDITIONS .. 4. WORKING STRESS AND EQUIPMENT/APPARATUS 6. BASIC REQUIREMENTS FOR ELECTRICAL EQUIPMENT .. 9. MATERIALS AND WORKMANSHIP .. 9. PROTECTION, CLEANING AND PAINTING .. 12. PACKING .. 13. DELIVERY .. 14. PROGRAMME AND PROGRESS .. 14. EQUIPMENT TESTING AT PLACE OF MANUFACTURE .. 14. PHOTOGRAPHS .. 15. SECTION II - TECHNICAL SPECIFICATIONS .. 16. 2 TECHNICAL SPECIFICATIONS FOR LINE CONSTRUCTION MATERIALS .. 17. SPECIFICATIONS FOR 66KV THREE POLE DISCONNECTORS .. 17. SPECIFICATIONS FOR 33KV THREE POLE DISCONNECTORS .. 19. specification FOR 66KV SURGE ARRESTERS (SURGE DIVERTERS) .. 22. specification FOR 33KV SURGE ARRESTERS (SURGE DIVERTERS).

3 25. specification FOR 66KV LINE POST INSULATORS .. 30. specification FOR 33 AND 11KV COMPOSITE INSULATORS .. 33. CHARACTERISTICS .. 34. SPECIFICATIONS FOR 66KV COMPOSITE INSULATORS .. 34. SPECIFICATIONS FOR STAY, STAY INSULATORS AND STAY BLOCKS .. 37. specification FOR STAY INSULATORS UPTO 43. specification FOR 33 KV EXPULSION FUSE CUT-OUT .. 46. specification FOR 33 KV EXPULSION FUSE HOLDER .. 47. 3. GUARANTEED TECHNICAL PARTICULARS.. 50. PREAMBLE .. 50. 300 MMSQ ALL ALUMINIUM ALLOY CONDUCTOR NOT REQUIRED .. 50. 66KV DISCONNECTORS (AIR BREAK SWITCHES) .. 51. 33KV DISCONNECTORS (AIR BREAK SWITCHES) .. 54. 66KV POST INSULATORS .. 57. 66KV COMPOSITE INSULATORS .. 58. 33KV COMPOSITE INSULATORS.

4 58. 66KV SURGE ARRESTORS (DIVERTERS) .. 59. 33KV SURGE ARRESTORS (DIVERTERS) .. 60. 66KV 400 MMSQ SINGLE CORE XLPE COPPER CABLE NOT REQUIRED .. 62. 2. Contract XI April 2011 KPLC. 3. Kenya Power and Lighting Co Ltd Section VI Schedule of Requirements Kenya Electricity Expansion Project TECHNICAL SPECIFICATIONS Section I General SPECIFICATIONS 3. Contract XI April 2011 KPLC. 4. Kenya Power and Lighting Co Ltd Section VI Schedule of Requirements Kenya Electricity Expansion Project TECHNICAL SPECIFICATIONS 1 GENERAL SPECIFICATIONS . SCOPE OF WORKS: The contract covers design, supplying and testing before shipment, painting, packing for transport, insuring, shipping, delivering to the port of Kenya, landing, customs clearing, transporting from the port to KPLC stores all materials referred to as Isolators , INSULATORS AND SURGE.

5 DIVERTERS FOR 66kV, 33kV & 11kV LINES generally described below. Subsequent paragraphs will give detailed descriptions and requirements as to the plant specified herein. 66kV, 33kV and 11kV overhead lines Insulators line hardware materials and fittings Stays and stay blocks Insulators Air break switches and fittings DESCRIPTION OF THE PROJECT. As described under Section VII preamble. STANDARDS. Ratings, characteristics, tests and test procedures, etc. for the electrical equipment encompassed by this specification shall comply with the provisions and requirements of the standards of the International Electro- TECHNICAL Commission (IEC), and or KPLC operational standards unless otherwise expressly stated in Particular TECHNICAL SPECIFICATIONS .

6 Where the IEC standards do not fully cover all provisions and requirements for the design, construction, testing, etc. and for equipment and components that are not covered by IEC. Recommendations recognized national standards shall be applied. The latest revision or edition in effect at the time of Bid Invitation shall apply. Where references are given to numbers in the old numbering scheme from IEC it shall be taken as to be the equivalent number in the new five-digit number scheme. The Bidder shall specifically state the Precise Standard, complete with identification number, to which the various equipment and materials are manufactured. The Bid Documents do not contain a full list of standards to be used, as they are only referred to where useful for clarification of the text.

7 UNIT OF MEASUREMENT AND LANGUAGE. In all correspondence, in all TECHNICAL schedules and on all drawings prepared by the Contractor, the metric units of measurement shall be used. On drawings or printed pamphlets where other units have been used, the equivalent metric measurements shall be added. All documents, correspondence, drawings, reports, schedules instructions, and nameplate readings of the equipment shall be in the language stated in the Bid Data sheet. SERVICE CONDITIONS. From the geographical condition, the project area is categorized into the tropical climate zone. In choosing materials their finishes, due regard shall be given to the humid tropical conditions under which the plant shall be called upon to work.

8 The contractor shall submit 4. Contract XI April 2011 KPLC. 5. Kenya Power and Lighting Co Ltd Section VI Schedule of Requirements Kenya Electricity Expansion Project TECHNICAL SPECIFICATIONS details of his usual practice which have proven satisfactory and which he recommends for application to the parts of the work, which may be affected by tropical conditions. The materials and finishes used shall be approved by the Employer. All switchgear and control cubicles shall also be rodent and vermin proof. Environment a) Unless otherwise specifically stated in Particular TECHNICAL SPECIFICATIONS or Scope of Works, any equipment, component and assembly shall be designed for the following service conditions: Parameter Max Min Ambient air temperature Outdoor +40 C -1 C.

9 Indoor +40 C -1 C. 24 hour average maximum +30 C -1 C. Ambient temperature for cables in the ground +40 C -1 C. Relative humidity 90%. Height above sea level 1800m EMC Class (IEC 61000) Industrial environments Seismic coefficient Wind pressure on project area 400 N/m . of conductors and cylindrical objects Maximum wind pressure on steel members 820 N/m . on times projected area Rainfall conditions Average 800-1700 mm/year Maximum 160mm in 24 hrs Annual mean isokeraunic level Max 180 thunderstorm days Pollution (IEC 60815) Heavy :class II. Wherever any of these maximum or 24 hour average temperatures exceed the normal service condition temperatures of the IEC Recommendations for the relevant equipment, or of such other standard which is approved to be applied, the permissible temperature rises of the IEC.

10 Recommendations or the standard shall be reduced by the same amount as the difference between the above figures and the normal service condition temperatures. The Contractor shall guarantee these reduced temperature rises. All air cooled equipment shall be cooled with convection ( without fans) provided other cooling methods are not explicitly allowed for in the SPECIFICATIONS . Acoustics, Noise measurement The equipment shall as far as possible not generate undue vibrations or bothersome noise. Provided nothing else is specified the following requirements shall not be exceeded: Area of equipment location Maximum noise level dB(A). Machine hall, workshop etc. (one meter from 85.)