RFQ Number | Items Required | Qty | Date Posted | Closing Date | Closing time |
PR10241267
RQ22112021
|
Box Channel X arm 100mmX100mmX3200mm |
5 |
07/12/2022 |
12/12/2022 |
10:00 am |
PR10238099
RQ22112124
|
Cement 50kg ( Strength-32.5 ) |
50 |
07/12/2022 |
12/12/2022 |
10:00 am |
PR10241266
RQ22112917
|
SCA Conductor 100mm2 bare dog |
12600m |
07/12/2022 |
12/12/2022 |
10:00 am |
PR10240134
RQ22110713
|
Long Aluminium sighting rods (1m long segments ) |
2 |
07/12/2022 |
12/12/2022 |
10:00 am |
KINDLY FIND DETAILED SPECIFICATIONS ON OUR ZETDC WEBSITE |
1. Introduction-This Specification covers the details of the Aluminium Conductor Steel Reinforced for use on overhead lines.The sizes of conductors standardised for lines are indicated below:
2. Standards, Units and Language All conductors supplied under this specification shall conform to the following standards (latest edition and amendments): a) BS 215 b) IEC 207 c) IEC 1089 d) Any other standard provided the tenderer can provide documentary evidence that the standard is equal to or better than the above standards. SI units of measurements shall be used throughout. The conductors shall be manufactured to high quality standards. The companies manufacturing the Conductors shall have ISO 9001 or 2 certification. Documentary proof of ISO Certification shall be provided with the bid. 3. Construction Aluminium Conductor Steel Reinforced shall be in accordance -with BS 215: part 2 (1970) or IEC 207 (1966) or any equivalent internationally recognised standard. Aluminium wire used in the construction of the conductors shall be drawn from aluminium rod and shall be in accordance with materials GIE in the H9 condition complying with B S 2627 or equivalent internationally recognised standard. The purity of the aluminium in the conductors shall be, not less than 99.5 %, and the content of copper shall not exceed 0,01%. The strands shall be smooth and free from all imperfections, such as spills & splits. No joints shall be permitted in any strands. – Any consignment of conductors with protruding steel core will be rejected. All AC SR conductors shall have grease impregnated steel core. Insulated conductors shall have compacted strands with water blocking powder placed between the conductor and XLPE insulation The insulation shall be Weather resistant carbon loaded XLPE with a minimum thickness of 2.3 mm. 4. Mechanical, and Electrical CHaracteristics The mechanical and Electrical Properties of conductors shall be as per table below.
5. Tests The samples of individual wires for the tests shall normally be taken-before stranding. The manufacturer shall carry out test on samples taken out at least from 10% of aluminium wire spools. The aluminium strands shall comply with the following tests. a) Breaking load test b) Wrapping test c) Resistance test 6. Packing and Marking 6.1 Conductor Drums The conductor shall be supplied and delivered on drums. The flanges and barrels of the drum shaft be made entirely of a suitable and seasoned wood which shall be treated. If hardwood is used, it shall not form more than 40% of the total weight of wood making up the drum, neither shall it be used on the inside of the flanges and barrels, so that it shall not be in contact with the conductor. Spindle holes shall not be less than 60 mm in diameter. The surrounding of the holes shall be suitably reinforced. The flanges and barrel shall be-free from protruding material capable of damaging the conductor or the hands of the operator during rotation of the drum. The drum flanges shall be solidly secured with solid mild steel rods, nuts and square washers. The batons shall be secured with a minimum of two nails at each end and wrapped with a minimum of two steel bands or galvanized steel wire of minimum diameter 2.3nun. The quality of the drums shall cope with at least 3 years of outdoor storage. The drum for the Dog type conductor shall have a diameter of at least 700 mm. – 6.2 Packing The surface of the barrel and the inside of-the flanges shall be lined with waterproof paper. The loose end of the conductor shall be firmly stapled to the inside of the flanges. The drum number shall be branded or gauged into the outside of one of the flanges. An arrow shall indicate the direction in which the drum shall be rolled. A label showing size, type and length of conductor shall be firmly secured to the outside of one of the flanges. The label shall be suitably weatherproofed. The gross mass of the drums for the various sizes of the conductors shall be between 1300 and 1000 Kg: 6.3 Marking The following information shall be marked on each package: a) Manufacturer’s name b) Trade mark, if any c) Drum or identification number d) Size and name of conductor e) Lengths of conductor f) Gross mass of drum g) Net mass of conductor – h) Direction of rolling i) Tender number and order number 7. Inspection All tests and inspection shall be made at the place of manufacture unless otherwise especially agreed upon by the manufacturer and ZESA at the time of purchase. Two ZESA Engineers shall inspect the material at the manufacturer’s premises and the Supplier shall meet all travelling, hotel and all testing costs. The manufacture shall afford the inspector representing ZESA all reasonable facilities without charge, to satisfy him that the material is being furnished in accordance with this Specification. Alternatively, for imported conductor ZESA at its discretion may appoint a reputable international Agency such as LLOYDS or SGS to conduct inspection for every shipment consignment. The successful bidder shall arrange and pay for such inspection. All inspection costs shall be included in the bid price. An inspection certification shall be submitted with every shipment of conductor. 8.Technical Guarantee Schedule 8.1 Preamble a) The Technical schedule shall be filled in and completed by the Bidder, and – submitted with the Bid. b) All documentation necessary to evaluate whether the equipment offered is in accordance with this specification shall be submitted with the Bid. c) All data entered in the schedules of Technical Guarantees are guaranteed values by the Bidder and cannot be departed from whatsoever. c) All data entered in the schedules of informative Data are also guaranteed values by the Bidder. These data may only be altered following the Engineer’s written consent.
ANNEX 4.10b: ZESA SPECIFICATION No.41009/1997. SPECIFICATION FOR.- HARD DRAWN ALUMINIUM CONDUCTOR 1. Introduction- This Specification covers the details of the hard drawn aluminium conductors for use on low voltage (230/400 volts) overhead lines. The sizes of conductors standardised for lines are indicated below:
2. Particulars Of Electrical System The conductors shall be suitable for use on the following electrical system. a) outdoor, 3-phase b) Operated at 50 Hz variable between plus or minus 2.5% c) Directly Earthed d) Load currents up to 280 amps for 100 mm square HDA. e) Faults currents to 25kA 3. Standards, Units And Language All conductors supplied under this specification shall conform to the following standards (latest edition and any amendments): a) BS 215 b) IEC 207 c) IEC 1089 d) IEC 889 e) Any other standard provided the Tenderer can provide documentary evidence that the standard is equal to or better than the above standards. All tenderer’s correspondence and all descriptions upon drawings, illustrations or instructions shall be in the English language. SI units of measurements shall be used throughout. The conductors shall be manufactured to high quality standards. The companies manufacturing the conductors shall have ISO 9001 Certification and shall submit documentary proof thereof. The conductors shall be sourced from manufacturers who can document at least 10 years experience in manufacture of conductors and have supplied and/or manufactured at least 10 000 km of conductors. The supply record for the last 5 years shall be submitted with the bid. 4. Mechanical And Electrical Characteristics The required electrical and mechanical characteristics of conductor are as shown on table below.
5. Tests The samples of individual wires for the tests shall normally be taken before stranding. The manufacturer shall carry out test on samples taken out at least from 10% of aluminium wire spools. The wires used for all aluminium conductors shall comply with the following tests. a) Breaking load test b) Wrapping test c) Resistance test 6. Parking And Marking 6.1 Conductor Drums The conductor shall be supplied and delivered on drums. The flanges and barrels of the drums shall be made entirely of a suitable and seasoned wood, which shall be treated. If hardwood is used, it shall not form more than 40% of the total weight of wood making up the drum, neither shall it be, used on the inside of the flanges and barrels, so that it shall not be in contact with the conductor. Spindle holes shall not be less than 60mm in diameter. The surrounding of the holes shall be suitably reinforced. The flanges and barrel shall be free from protruding material capable of damaging the conductor or the hands of the operator during rotation of the drum. 6.2 Parking The surface of the barrel and the inside of the flanges shall be lined with waterproof paper. The loose end of the conductor shall be firmly stapled to the inside of the flanges. The drum number shall brand or gauged into the outside of one of the flanges. An arrow shall indicate the direction in which the drum shall be rolled. A label showing size, type and length of conductor shall be firmly secured to the outside of one Of the flanges. The label shall be suitably weatherproofed. Where battens are not used on the circumference of the flanges, the circumference of the conductor shall be well protected by hessian or similar to prevent damage to the outer layers of the conductor. The gross mass for various conductors shall not exceed by more than 10% of the values given in the following table: 25mm2Al. Area (7/2.21mm) 500kg 50mm2Al. Area (7/3.10mm) 500kg 100mm2Al. Area (7/4.39mm 500kg The normal length of various conductors shall be as given in the following-table: Conductor size normal conductor length 25mm2Al. Area. (7/2.21) 1.0km 50mm2Al. Area. (7/3.10) 1.0km 100mm2Al. Area. (7/4.39) 1.0km Longer lengths shall be acceptable. Short lengths, not less than 50% of the standard lengths, shall be acceptable to the maximum extent of 10% of the quantity ordered. 6.3 Marking The following information shall be marked on each package: a) Manufacturers’ name b) Trade mark, if any c) Drum or identification number d) Size of conductor e) Number and lengths of conductor f) Gross mass of the package g) Net mass of conductor 7. Inspection All tests and inspection shall be made at the place of manufacture unless otherwise especially agreed upon by the manufacturer and purchaser at the time of purchase. The manufacture shall afford the inspector representing the purchaser all reasonable facilities without charge, to satisfy him that the material is being furnished in accordance with this Specification. For imported conductor a reputable international Inspection Agency such as LLOYDS or SGS shall inspect every shipment. The successful bidder shall arrange and pay for such inspection. Inspection costs shall be included in the bid price. An inspection certification shall be submitted with every shipment of conductor. 8. Technical Guarantee Schedule 8.1 Preamble a) The Technical schedule shall be filled in and completed by the Bidder, and submitted with the Bid. b) All documentation necessary to evaluate whether the equipment offered is in accordance with this Specification shall be submitted with the Bid. c) All data entered in the schedules of Technical Guarantees are guaranteed values by the Bidder and cannot be departed from whatsoever. d) The Bidder also guarantees all data entered in the schedules of informative Data. These data may only be altered following the Engineer’s written consent.
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