Procurement of Operational Spares - 69/13.8kV Substations Contract Number GPL - PI ADDENDUM No. 1

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1 March 08, 2016 Prospective Bidders Procurement of Operational Spares - 69/13.8kV Substations Contract Number GPL - PI ADDENDUM No. 1 Please find attached an addendum on the above contract. This addendum forms part of the contract and must be included in your bid submission. Please acknowledge receipt of this addendum in the Bid Submission Form. Should you require any further clarifications, do not hesitate to contact Mr. Navin Deonarayan, Project Engineer, Projects Management Department, Guyana Power & Light 257/259 Middle Street, Cummingsburg, Georgetown, Tel or , .ndeonarayan@gplinc.com Yours sincerely GUYANA POWER & LIGHT INC. Lennox McGreggor Projects Manager 38

2 Procurement of Operational Spares - 69/13.8kV Substations Contract Number GPL - PI Addendum No.1 This addendum addresses a clarification requested on and now forms part of the bidding and contract documents and modifies the original bidding documents. Kindly acknowledge receipt of this addendum in the space provided in the Bid Submission Form. Failure to do so may subject Bidder to disqualification. AMENDMENTS/CLARIFICATIONS OF Instruction to Tenderers, Procurement of Operational Spares - 69/13.8kV Substations. a. Closing date for the submission of Bids for Procurement of Operational Spares - 69/13.8kV Substations has been extended to March 30, 2016 at 14:00 hours. b. The TECHNICAL AND GENERAL REQUIREMENTS is amended. c. Appendix I is included. TECHNICAL AND GENERAL REQUIREMENTS CONTENTS 1.01 SCOPE STANDARDS COMPLIANCE WITH SPECIFICATION COMPLIANCE WITH REGULATIONS SERVICE CONDITIONS SYSTEM CONDITIONS 43 39

3 1.07 QUALITY ASSURANCE INSPECTION AND TESTING GENERAL TYPE TESTS AND ROUTINE TESTS REJECTION CORROSION PROTECTION NON CORRODING FASTENERS SAFETY HAZARDOUS SUBSTANCES SPARE PARTS SPECIAL TOOLS PACKING AND SHIPPING LABELS GUARANTEE SUBMITTALS WHICH FORM PART OF THE BID SUBMITTALS AFTER CONTRACT AWARD COMPLETENESS OF SUPPLY 51 40

4 SPECIFICATION: TECHNICAL AND GENERAL REQUIREMENTS 1.01 SCOPE A. General This specification covers Technical and General Requirements for Procurement of Operational Spares 69/13.8kV Substations. Equipment shall include Materials, Goods and Services. B. Associated Specifications This Specification shall be associated with each of the Equipment Standards listed in Appendix STANDARDS A. Standards of General Application Standards of General Application include but are not limited to the following (Short Title): ANSI C84.1 IEC 617 Voltage Ratings for Electrical Power Systems Graphic Symbols for Drawings B. Standards of Particular Application Equipment shall be manufactured and tested in accordance with the Standards of Particular Application, listed in Appendix 1. C. Alternative Standards The Bidder may propose alternative standards, provided it is demonstrated that they give a degree of quality equivalent to that of the referenced standards. Acceptability of any alternative standard is at the discretion of the Procuring Entity COMPLIANCE WITH SPECIFICATION 41

5 All equipment offered shall comply fully with the requirements of this Specification and the Specification applicable to the item. Any minor departure must be disclosed at the time of Bidding in the Non-Compliance Schedule included in each Specification COMPLIANCE WITH REGULATIONS All equipment and accessories shall comply in every respect with the Regulations and Acts in force in Guyana. Bidders shall acquaint themselves with such Regulations. In case of difficulty, the Procuring Entity will provide assistance SERVICE CONDITIONS The equipment shall be suitable for installation in the 69/13.8KV Substations having the characteristics described below: Environmentally, the region where the equipment is being installed is tropical. It includes coastal areas subject to high relative humidity, which can give rise to condensation, and onshore winds will frequently be salt-laden. On occasions, the combination of salt and condensation may create pollution conditions for outdoor equipment including insulators. Therefore, outdoor material and equipment shall be: A. Designed B. Protected for use in an exposed, heavily polluted, salty, corrosive and humid tropical coastal atmosphere. The Supplier shall comply fully with the requirements of this Specification and associated ASTM A123 or BS729 Hot-dip Galvanizing in the provision of the necessary corrosion protection 42

6 Altitude Maximum daily mean temperature Maximum outdoor ambient shade temperature Design Temperature for Equipment Rating Minimum outdoor ambient shade temperature Maximum relative humidity Wind Velocity Isokeraunic level Average Number of days with Rain p.a. Average Annual rainfall, cm : <1000m above sea-level : 30 C : 40 C : 40 C : 15 C : 100% : 30 kph : 70 :120 : 150 Table 1. Service Conditions 43

7 1.06 SYSTEM CONDITIONS All equipment shall be rated not less than the requirements of the 60 Hz system parameters as outlined below: Nominal System Voltage: 69 KV 13.8 KV LV Single Phase 120/240 V LV Three Phase 240/480 V (see note 1) 125 VDC Maximum System voltage: 75 KV 15 KV 125/ / VDC Nominal Short Circuit Levels: 12.6 KA 35 KA 16 KA 16 KA Insulation Levels BIL: Power Frequency 1 min.: 350 KV 160 KV 95 KV 34 KV 30 KV 10 KV 30 KV 10 KV 1000 VDC Creepage 25mm/kV Neutral Grounding Arrangements: Star connected with directly grounded neutral Delta connected (grounded through zigzag transformer) Solidly Grounded Solidly Grounded Table 2. System Conditions Voltage spread to ANSI C 'Voltage Ratings for Electrical Power Systems'.: Note 1: Other 3-phase voltages may also be applicable for special applications where so specified. 44

8 1.07 QUALITY ASSURANCE A. Quality Assurance governing the Supply Details of the Quality Assurance governing Supply of Equipment shall be submitted with the Bid and shall typically include details such as: The Structure of the Organization and the Independence of the QA function. The System for Purchasing, Taking Delivery and Verification of Quality of Materials; The System for Ensuring Quality of workmanship; Proposed Subcontractors who shall be Subject to Procuring Entity s Approval The System for QA of Sub-contractors equal to the Bidder s Hold and Notification Points; Final Inspection and Test. B. Manufacturer s Certification If Manufacturers are certified to a recognized Quality Management and Quality Assurance Standards such as ISO 9001 or ISO 9002, such certification shall be submitted as part of the bid documentation INSPECTION AND TESTING - GENERAL Full details of proposed tests, including connection diagrams and drawings, shall be submitted for the Procuring Entity s approval, at least one month before testing. In the case of components for which specific type tests or routine tests are not given in this specification, the Supplier shall include a list and details of the tests normally required for these components. If the Procuring Entity does not indicate his intention to participate in the testing, the manufacturer may proceed with the tests and shall furnish the results thereof to the Procuring Entity. No inspection or lack of inspection or passing by the Procuring Entity s representative of equipment or materials shall relieve the Supplier from his liability to complete the supply in accordance with the order and this specification. 45

9 The Supplier shall submit to the Procuring Entity two signed copies of test certificates. The test certificates must: - Show actual test values, and not merely confirm that requirements have been met. - Include the date on which the tests were carried out - Include the Procuring Entity s order No. - For items with serial numbers such as bushings, etc., - give the serial numbers included in the consignment and the serial numbers of the test samples. No materials shall be dispatched until the test certificates have been received by the Procuring Entity and the Supplier has been informed that they are acceptable. All materials supplied shall have successfully met the Quality Assurance, Type and Routine Testing and Other Requirements of this General and Technical Requirements Specification and its associated Specific Equipment Specifications listed in Appendix 1. The Supplier shall be responsible for the proper testing of the plant or materials supplied by sub-suppliers to the same extent as if the plant or materials were completed or supplied by the Supplier. The Procuring Entity shall have free entry at all times, while work on the order is being performed, to all parts of the manufacturer's works, or sub-supplier s works which concern the processing of the equipment ordered. The manufacturer shall afford the Procuring Entity without charge, all reasonable facilities to ensure that the equipment being furnished is in accordance with this specification. The Procuring Entity may decide to have the equipment tested after reception. The supplier shall co-operate with this inspection and shall provide to the Procuring Entity, free of charge, all the facilities which the latter may require. The Procuring Entity shall have the right, if he so chooses, to review Design Analysis and Calculations (where, for example, in the opinion of the Procuring Entity, the adequacy of the Design is not adequately demonstrated by other Submittals or by the Type or Routine Tests). Prices for Type Tests, or Additional Type Tests, shall be quoted as a separate item, if requested. All routine and Special or Sample Tests required by this Specification shall be carried out at the expense of the Supplier. The Procuring Entity shall cover his own costs arising from attendance at tests TYPE TESTS AND ROUTINE TESTS 46

10 A. Type Tests Type Tests are specified in the Associated Specifications listed in Appendix 1 A list of Type Tests completed, and copies of Type Test Certificates shall be submitted with the Bid. B. Routine Tests Routine tests are specified in the Associated Specifications listed in Appendix 1. A list of Proposed Routine Tests and Sample Copies of Routine Test Certificates shall be submitted with the Bid C. Special or Sample Tests Special or Sample tests shall be at the Procuring Entity s option. Such Tests shall be carried out in accordance with the requirements of the specific Equipment / Materials Specifications and Standards REJECTION The Procuring Entity reserves the right to reject equipment or to demand modifications to equipment if the test results do not comply with the values specified or with the data given in the technical data schedule. If more than 10% of a particular consignment fails to meet any of the requirements of this Specification, the Procuring Entity shall be free to reject the whole consignment. On no account shall any rejected consignment, or part thereof be again presented for test unless with the written approval of and under conditions determined by the Procuring Entity. In the event of disagreement arising between Procuring Entity and Supplier as to Quality of Equipment or Material, the matter shall be referred to an Independent Testing Laboratory mutually agreed upon for test under specified conditions. The Report of such Test shall be final and the expense shall be borne by the party against whom the decision is given CORROSION PROTECTION A. Corrosion Protection Standard Given the highly corrosive environmental conditions, the highest importance is attached to the adequacy of the Supplier s Proposed Corrosion Protection Systems. 47

11 The Supplier shall use a recognized National or International Standard to define the Corrosion Protection he proposes to meet these highly corrosive conditions. B. Hot-dip Galvanizing All ferrous materials and all ferrous components of accessories and fittings shall be hot-dip galvanized, in accordance with the ASTM A123 or BS729: Hot-Dip Galvanizing unless the ferrous material is stainless steel. High tensile steel nuts, bolts and spring washers shall be electro-galvanized. C. Other Corrosion Protection and Painting Systems Where Hot-dip Galvanizing of ferrous materials is clearly not feasible, other methods of corrosion protection shall be proposed by the Bidder, for approval by the Procuring Entity D. Confirmation of Corrosion Protection The Supplier shall furnish a Statement, as a submittal forming part of the Bid, confirming that the corrosion protection of all ferrous materials shall be by means of Hot-dip Galvanizing, except as otherwise permitted above NON CORRODING FASTENERS 1.13 SAFETY Nuts, bolts, and washers shall be of non corroding metal or metal alloy. Ferrous bolts, nuts and washers placed in outdoor positions shall be treated by hot dip galvanizing to prevent corrosion, except high tensile steel bolts and spring washers which shall be electro-galvanized to service condition four. Appropriate precautions shall be taken to prevent electrolytic action between dissimilar metals. Where bolts are used on external horizontal surfaces and where water can collect, methods of preventing the ingress of moisture to the threads shall be provided. Taper washers shall be provided, where necessary, and protective washers of suitable material shall be provided front and back on the securing screws. All nuts and pins shall be adequately locked. 48

12 Equipment shall not present Hazards to personnel involved in handling, installation, testing, operation and maintenance HAZARDOUS SUBSTANCES The Supplier shall give an assurance, in the following terms, that: There are no substances - in concentrations which could be classified as hazardous under any applicable National, International or Other Codes or Standards- in the Supply. In the event that hazardous substances are found in concentrations in breach of the above, then: The Supplier shall be responsible for any injury resulting from such hazardous substances. The Supplier shall accept responsibility for the return of the goods and disposal of the hazardous substances. There is an absolute prohibition on any PCB content whatsoever. The Supplier shall submit safety data sheets for all substances in his Supply which could be hazardous above certain limits SPARE PARTS The Bidder shall give an assurance that spare parts, if required, will continue to be available throughout the life of the equipment. Spare parts shall be delivered suitably packed and clearly identified as to what they relate to and, where applicable, with a designation number corresponding to a drawing or corresponding to the spare parts list in the Operation and Maintenance instructions SPECIAL TOOLS The Bidder shall provide a priced list of all special tools and apparatus required for erection, commissioning and maintenance of the equipment PACKING SHIPPING AND DELIVERY A. Delivery to a Designated Stores 49

13 The Supplier shall ensure safe transit from the Manufacturer s works to a Designated Store or Warehouse and shall be responsible for all associated costs and expenses, including offloading, delivery, and insurance. B. Customs Clearance and Delivery to Site Customs Clearance and Delivery from such Designated Store or Warehouse to Site shall be carried out by GPL at their expense. C. Packing Cases Packing Cases shall be robust, wooden and non-returnable packing. Equipment and accessories shall be packed and securely clamped within such cases. D. Delivery Documentation Delivery Documentation shall include the following, at a minimum: - a clearly defined delivery docket number - supplier s name; - contract number / order no. - quantity of material, description and GPL Item No. - packing list A packing list in a sealed waterproof envelope shall accompany each case/drum or other delivery configuration. Two copies of each packing list shall be sent to the Procuring Entity prior to dispatching the equipment/material. E. Marking of Packing Cases or Drums Each packing case ( or drum for cables and conductor ) shall be indelibly marked, on two sides - with the following: - individual serial number; - Procuring Entity s name; - contract number / order no. - supplier s name; - manufacturer s name; - country of origin; - description of contents; or - conductor/cable details and length on drum 50

14 - case/drum measurements; - gross and net weights; and - all necessary slinging and stacking instructions. F. Delivery Program 1.18 LABELS The Bidder shall state and guarantee a delivery time from the date of receipt of an official order for the first consignment. He shall also clearly state the subsequent rate for dispatch of the material on a per week/month basis. All apparatus shall be clearly labeled indicating where necessary, its purpose and service positions The material of all labels and plates their dimensions, legend and the method of printing shall be subject to approval of the Procuring Entity. Colors shall be permanent and free from fading. All labels and plates for outdoor use shall be free of incorrodible material GUARANTEE The Supplier shall provide a guarantee which shall include the following: Satisfactory operation during the guarantee period of 18 months from the date of shipment. Performance figures as supplied in the Technical Schedule. No need for maintenance renewal of Corrosion Protection for at least five years from the date of delivery SUBMITTALS WHICH SHALL FORM PART OF THE BID The following Submittals, which shall form part of the Bid, shall be provided, in respect of each item: 1. Schedules, duly completed: - Technical Schedule - Non-compliance Schedule - Schedule of Type Tests Completed and Proposed Routine Tests. There shall be attached to this Schedule: 51

15 2. Delivery Program. A. Copies of Type Test Certificates B. Sample Copies of Routine Test Certificates 3. Descriptive Literature giving technical details 4. Outline Dimension Drawings. 5. Outline Installation, Operation and Maintenance Information 6. Manufacturer s Recommendations regarding spares - together with prices. A. Mandatory Spares B. Recommended Spares 7. A Priced Schedule of all special tools and equipment required for erection, commissioning and maintenance of the equipment. 8. Outline of Manufacturer s Quality Assurance Policy/Program. 9. A Statement confirming that the corrosion protection of all ferrous materials not of stainless steel shall be by means of Hot-dip Galvanizing, or alternative proposal as indicated in Clause 1.06 B. The Submittals, in total, shall provide all necessary detail to allow the offer to be evaluated technically. Where applicable, detail required for life-span costing e.g. Losses, etc shall be provided. Data must be specific to the item offered. Generic or General Data is not acceptable. Submittals, must be in English or with an English translation provided SUBMITTALS AFTER CONTRACT AWARD A. Technical Folders Hard Copy The Procuring Entity shall nominate items of equipment for which the Supplier shall provide two bound Folders of Technical Particulars. Information in respect of each nominated item shall include the following, insofar as applicable: - Descriptive literature giving full technical details. - Detailed dimensioned drawings. 52

16 - Installation, Commissioning and Operation and Maintenance Instructions - Manufacturers Recommendations regarding spares A. Mandatory Spares B. Recommended Spares - A Schedule of all special tools and equipment required for erection, commissioning and maintenance of the equipment. - Calculations validating the Design ( If requested by the Procuring Entity ) - Technical data schedule, with approved revisions - Inspection and test reports carried out in the manufacturer s works; Such folders shall be subject to approval by the Procuring Entity, who shall reserve the right to call for additional information, if in his opinion such is required. B. Technical Folders Electronic Version Suppliers shall provide an Electronic Version of the Technical Folders in addition to the hard copy. C. Drawings and Documentation 1. Schedule for the Production of Drawings Within 10 days of placement of order, the Supplier shall submit for approval by the Procuring Entity, a schedule of the drawings to be produced. The schedule shall also provide a program of drawing submittals. 2. Drawings and Document Formats All detail drawings submitted for approval shall be to scale not less than 1:20. All the important dimensions shall be given and the material of which each part is to be constructed shall be indicated on the drawings. All documents and drawings shall become the property of the Procuring Entity. All drawings and calculations, submitted to the Procuring Entity, shall be on international standard size paper, A0, A1, A2, A3 or A4. All such drawings and calculations shall be provided with a contract title block, which shall include the name of the Procuring Entity and shall be assigned a unique drawing number. Lettering sizes and thickness of lettering and lines be selected so that if reduced by two stages to one quarter of their size, the alphanumeric characters and lines are still perfectly legible so as to enable them to be microfilmed. 53

17 For presentation of design drawings and circuit documents, IEC Publication 617 or equivalent standards for graphical symbols are to be followed. 3. Approval Procedures The Supplier shall submit all drawings, documents and type test reports for approval in sufficient time to permit modifications to be made if such are deemed necessary and resubmit them for approval without delaying the initial deliveries or completion of the supply. The Procuring Entity shall endeavor to return them within a period of two weeks from the date of receipt. Three copies of all drawings shall be submitted for approval and three copies for any subsequent revision. The Procuring Entity reserves the right to request any further additional information that may be considered necessary in order to fully review the drawings. If the Procuring Entity is satisfied with the drawing, one copy will be returned to the Supplier marked with Approved stamp. If the Procuring Entity is not totally satisfied with the drawing, then Approved Subject to Comment status will be given to it and a comment sheet will be sent to the Supplier. If the drawing submitted does not comply with the requirements of the specification then it will be given Not Approved status and a comment sheet will be sent to the Supplier. In both these cases the Supplier will have to modify the drawing, update the revision column and resubmit for final approval. Following approval, ten copies of the final drawings will be required by the Procuring Entity. Any drawing or document submitted for information only should be indicated as such by the Supplier. Drawings and documents submitted for information only will not be returned to the Supplier unless the Procuring Entity considers that such drawing needs to be approved, in which case they will be returned suitably stamped with comments. The Supplier shall be responsible for any discrepancies or errors in or omissions from the drawings, whether such drawings have been approved or not by the Procuring Entity. Approval given by the Procuring Entity to any drawing shall not relieve the Supplier from his liability to complete the supply in accordance with this specification and the conditions of contract nor exonerate him from any of his guarantees. 4. Electronic Versions of the Drawings & Documentation Electronic versions of drawings and documentation shall be provided COMPLETENESS OF SUPPLY All accessories or fittings not specifically mentioned in a Specification but which are necessary or usual for similar equipment and for its efficient performance shall be included in the Bid along with full details and price. The attention of the Procuring Entity should be drawn to it. 54

18 Appendix1 The following list includes but is not limited to the standards guiding the supplied equipment specifications. SECTION III GENERAL TECHNICAL REQUIREMENTS 1. Substation automation - IEC Pipe labels BS "Hydraulic" nipples -BS Drawing- BS 308 and BS 1192, ISO 128, ISO 5455, ISO 5456, ISO 5457, ISO 6433, ISO and ISO Humid tropical conditions- ISO Nuts and bolts and washers- ASTM A396, IS0/R272 or BS 1802 and galvanized to ASTM A Non-destructive examination of the finished weld -BS EN 1435 /BS EN Galvanized - ASTM A123, or BS Nuts and bolts and small components shall be tested in accordance with ASTM A153 or ISO 1459, 1460 and Chromium plating -BS Pressure gauges -BS EN Thermometer pockets- BS Electrical instruments and meters -IEC and lec Meters shall be calibrated -IEC Panel wiring -BS 6231 Type A or B 16. Wire colours -British Standard 6746C 17. Motors -BS 4999, BS 5000 and IEC Main conductor and slot insulation- IEC Terminals marked -BS Contactors -IEC Current and voltage transformers -IEC and IEC60 185/ IEC Oil and compound -IEC or BS Cable boxes for transformers -BS Oil leakage routine test -BS Compression glands -BS

19 SECTION VI OUTDOOR SWTCHGEAR AND EQUIPMENT 26. Clearances between live metal work and earth -BS Circuit-breakers -IEC (BS 5311) and IEC and IEC Transient recovery voltages recorded during the tests- (BS 5311). 29. Tripping mechanism -IEC Tubular busbars and electrical connections in outdoor substations -BS. 159 and Porcelain and toughened glass insulators -IEC and IEC Suspension and tension insulators with ball and socket fittings -IEC and Bushing insulators -IEC Isolating devices minimum safety clearances -BS Current transformers -IEC Voltage transformer accuracies and outputs- IEC Surge Arresters -IEC High current impulse test -IEC Whole of the rolled steel sections, tubes, flats, plates, bolts, buts and bars -BS EN SECTION VII METAL CLAD MEDIUM VOLTAGE SWITCHGEAR 40. Distance across all insulators -IEC Switchgear (indoor use) -IEC Air insulated switchgear -IP 2XC (IP 3X to IEC 60529) 43. Circuit-breakers -IEC and IEC Busbars and connections -BS Cable boxes -BS Base & Floor -ASTM A-36 SECTION VIII PROTECTION METERING AND SCADA 47. Relays -IEC 60255, or equal, and IEC Relay cases -IEC SECTION IX BATTERIES, CHARGERS AND DC SWITCHBOARD 49. Batteries -IEC Radio frequency interference voltage -BS 800/ BS EN SECTION X MAIN AND AUXILIARY POWER AND MULTICORE CONTROL CABLES 51. Cable outer coverings -BS 6746 or the relevant parts of IEC and IEC Mechanical glands for the termination of electrometric or thermoplastic insulated cables - BS

20 kv cable shall be cross-linked applicable polyethylene insulated -IEC tested in accordance with IEC Conductors -IEC or BS Voltage Identification -BS Partial discharge test -Clause 3 IEC Conductor resistance measurement to Clause IEC Voltage test on outer-covering - Clause 3.1 IEC High voltage test -clause 18 IEC Voltage (d.c.) test of 10 kv on anticorrosion covering -Clause 5 IEC Cables and associated terminating accessories type approval tests- IEC Insulating compounds -Clause 4 of IEC Core screen -IEC Multicore cables identified (red, yellow or blue)- IEC Anti-corrosion sheath extruded PVC compound to- IEC The armour bedding extruded PVC compound -BS 6346 IEC Armour on multicore cables -BS 1442 and BS 6346 or IEC Outer protective covering extruded black PVC compound -BS PVC insulated cable designs -BS XLPE insulated cables -BS Low Smoke & Fume cable - BS Stranded copper conductors shall be un-tinned- BS Power type multicore control cables -BS Conductor insulation -BS All cable protective covers -BS Power cables flame retardant outer covering -IEC 331 and/or IEC 332 SECTION XI TRANSFORMERS 77. Transformers -IEC or ANSI C57 and NEMA TR-l. 78. On-load tap changers -IEC or ANSI C Rating plate data -IEC or ANSI C SECTION XII COMMUNICATION EQUIPMENT 80. Rating plate data -IEC or ANSI C Miniature circuit breakers -IEC Printed Circuit Boards -BS PVC sheathed steel wire armoured and PVC served 600/1000 V grade -BS

21 84. Switchgear and isolators -BS Batteries -IEC Fuse links -BS 88 Class DC 40 SECTION XIII EARTHING ELECTRODES AND CONNECTIONS 87. Grounding -IEEE Earthing conductors -BS 6480 SECTION XV LV SWITCHBOARD 89. LV Switchboards -IEC V Switchboard -IEC Moulded-case circuit breakers -IEC Miniature circuit breakers -BS Fuses -IEC