REPLIES TO QUERIES ENGINEERING, PROCUREMENT ......REPLIES TO QUERIES ENGINEERING, PROCUREMENT AND...

REPLIES TO QUERIES

ENGINEERING, PROCUREMENT AND CONSTRUCTION (EPC) SERVICES FOR 1.00 MW MODEL SOLAR POWER

PROJECT AT NEEMRANA INDUSTRIAL AREA ON TURNKEY BASIS AND COMPREHENSIVE OPERATION &

MAINTENANCE FOR A PERIOD OF 10 YEARS

Sr.No.

Clause No Reference from RfQ cum RfP Queries Clarification

Commercial and Legal

1. Section 1, Clause 1, Page 7

“Engineering, Procurement and Construction (herein after called as EPC) Services for “Design, Engineering, Manufacture, Supply, Procure, Port Clearance, Transportation, Storage, Insurance, Erection, Testing and Commissioning of 1.00 MW Model Solar Power Project at Neemrana Industrial Area on Turnkey Basis and Comprehensive Operation & Maintenance for a Period of 10 Years at Neemrana Industrial Park, Japanese Zone, Neemrana, Rajasthan” (the “Project”).

We would like to request that the O&M contract be for 5 years from commissioning initially. However, it can be extended to 10 years at the time of termination of first 5 years of O&M on mutual consent between owner and contractor. Kindly confirm.

The conditions given in the RFQ cum RFP will remain unchanged.

2. Section 5, Clause 5.2.2 (d), Page 70

OEM Warranty for items supplied by client will be for 2 years only. Any cost required for maintenance of replacement of supplied

As the bidder shall be performing O&M for more than 2 years, the warrantee on free issue material provided by DMCIDC shall be till the end of O&M period. Further, DLP

The conditions given in the RFQ cum RFP will remain unchanged. For additional warrantee from 3rd year to 10th

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equipment will be incurred by EPC cum &O&M contractor for 10 year

on the equipment supplied by DMICDC shall not be covered under EPC scope.

years, bidder may directly approach to OEM at their cost as makes are finalized during the bid

3. Section 5, Clause 5.2.4 (ii), Page 78

The Contractor shall provide insurance against degradation in equipment / switchgear panels / cables, etc. offered for 25 years (life span of the project). The Contractor will ensure assignment of the insurance policy in the name of Client.

We request the client to consider insurances during O&M in their scope (i.e. after plant commissioning). Please confirm.

Refer Corrigendum 1. It will be 10 years. Other conditions given in the RFQ cum RFP will remain unchanged.

4. Article 3, Clause 3.1.4, Page 94

The Contractor shall remedy any and all loss or damage to the Model Solar Power Project from the Appointed Date until the end of the Construction Period at the Contractor’s cost.

We request that the following be added to the clause: "to the extent such loss or damage is due to reasons solely attributable to the Contractor. Please confirm.

Refer Corrigendum 1.

5. Article 3, Clause 3.8, Page 96

Unforeseeable Difficulties

We would like to mention that the contractor should be compensated for unforeseen events in terms of time and cost. Please confirm.



Consequential damages We would like to mention that the contractor should not be held liable for any consequential damages. Please confirm.


7. Article 6, Clause 6.1.6,

Except as otherwise provided in this Agreement, all risks relating to

We would like to have clarity on all risks as this is a very open ended clause. Please

The conditions given in the RFQ cum RFP will remain

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Page 109 the Project shall be borne by the Contractor; and the DMICDC-NSPCL shall not be liable in any manner for such risks or the consequences thereof.

confirm. unchanged.


The Contractor shall, for the performance of its obligations hereunder during the Construction Period, provide to the DMICDC-NSPCL, within 10 (ten) days of the date of this Agreement, an irrevocable and unconditional guarantee from a Bank in the form set forth in Annexure 5(the “Performance Security”) for an amount equal to 10% (Ten percent) of the Contract Price. The Performance Security shall be valid till 180 (One hundred and eighty) days with additional claim period of fifteen (15) days beyond the final acceptance testing.

We would request the client that the CPBG for successful bidder be released after 30 days of FAC OR against submission of Performance Bank Guarantee, whichever is earlier. Please confirm.


9. Article 7, Clause 7.1.1.a, Page 110

Bank Guarantee towards Operation and Maintenance: a. The Contractor shall within 15 days from the date of commissioning, furnish a Bank

We would like to mention that there is a contradiction in the mentioned clause in reference to Annexure 6 that whether the BG shall be against O&M price of 10 years or the total contract value. Kindly clarify.

It will be 10% of 10 years O&M quoted value.

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Guarantee equivalent to 10% of Operation & Maintenance Price of the 10 years O&M fees towards O & M Performance Security, in the form set forth in Annexure 6 (the “O & M Performance Security”) which shall be valid for one year from Final Acceptance Certificate (FAC) with additional claim period of 90 days


Appropriation of Performance of Security

We would like to mention that in case any BG i.e. BG against Contract or BG against performance is en-cashed by client (partially or fully), the bidder shall not replenish the BG to the original amount. BG against contract or performance shall be submitted only once. Please confirm.



Release of Performance Security: DMICDC-NSPCL shall return the Performance Security to the Contractor 180 (One hundred and eighty) days from the date of issuance of the Final Acceptance Certificate for the EPC Services under this Agreement. Notwithstanding the aforesaid, the Parties agree that the DMICDC-NSPCL shall not be obliged to

We would request the client that the CPBG for successful bidder be released after 30 days of FAC OR against submission of Performance Bank Guarantee, whichever is earlier. Please confirm.


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release the Performance Security until all Defects identified during the Defects Liability Period have been rectified.


Retention Money We would request the Client that as the bidder shall be submitting a BG against Contract (CPBG) for the construction period, hence no amount be deducted as guarantee money (or retention money) for performance of the obligations of the Contractor for the same. Please confirm.


13. Article 8, Clause 8.3.1 Page 113

For the avoidance of doubt, the Parties expressly agree that the Damages specified hereunder and the Time Extension specified in Clause 10.3 shall be restricted only to failure of the DMICDC-NSPCL to provide the Right of Way.

Please provide us the details of the Damages on failure of Client to provide ROW as stated herein.


14. Article 8, Clause 8.3.2 Page 113

Notwithstanding anything to the contrary contained in this Agreement, the Contractor expressly agrees that Works on all parts of the Site for which Right of Way is granted within 90 (ninety) days of the Appointed Date or with respect to the parts of the Site, no later than the date(s) specified therein, as the case may be, shall be

We would like to mention that in such case, the Client should at least confirm the quantum of land which will be handed over to the Contractor of the date of execution of this Agreement.

Refer Page No.62 of RfQ cum RfP Document.

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completed before the Scheduled Completion Date and shall not qualify for any Time Extension under the provisions of Clause 8.3.1.


Special / Temporary Right of Way The Contractor shall bear all costs and charges for any special or temporary right of way required by it in connection with access to the Site. The Contractor shall obtain at its cost such facilities on or outside the Site as may be required by it for the purposes of the Model Solar Power Project and the performance of its obligations under this Agreement.

We would like to mention that Row of any type shall not be in EPC's scope. Kindly provide clarity on this clause.



Shifting of Obstructing Utilities We would like to mention that the approvals and permits for all shifting and other utility related works shall be in Client's scope. Also, the reason of delay and it's subsequent LD shall be discussed and mutually agreed upon by both parties. Please confirm. Also, Please elaborate on the Damages, as clause 8.3.1 doesn't cover it adequately. 30 days of delay from utility owning entity is a large duration and cannot be absorbed


Sr.No.


by the Contractor. Contractor should be compensated for any delay in terms of cost and time.


For the avoidance of doubt, the Parties agree that if any felling of trees hereunder requires permission, the Applicable Permit thereof shall be procured by the DMICDC-NSPCL within the time specified in the Agreement.

Please clarify in terms of Permit to be obtained for felling of trees & cost to be borne. The highlighted provision is contradictory to the first sentence of this section 9.3.



In the event, that the Contractor fails to achieve any Project Milestone or the Scheduled Completion Date within the specified days from the date, unless such failure has occurred due to Force Majeure or for reasons solely attributable to the DMICDC-NSPCL, it shall pay Damages to the DMICDC-NSPCL of a sum calculated at the rate of 0.05% (zero point zero five percent) of the Contract Price for delay of each day reckoned from the date specified; and until such Project Milestone is achieved or the Works are completed; provided that if the period for any or all

We would request the client that the LD on delay shall only be applied on delay for commissioning and applicable on un-commissioned part of the project as 0.5% per Week of delay with a maximum cap of 5% of the total contract value rather than on each project milestone. Please confirm.


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Project Milestones or the Scheduled Completion Date is extended in accordance with the provisions of this Agreement, the dates shall be deemed to be modified accordingly and the provisions of this Agreement shall apply as if has been amended as above; provided further that in the event the Works are completed within or before the Scheduled Completion Date including any Time Extension, applicable for that work or section, the Damages paid under this Clause 10.3.2 shall be refunded by the DMICDC-NSPCL to the Contractor, but without any interest thereon.


Without prejudice to any other provision of this Agreement for and in respect of extension of time, the Contractor shall be entitled to extension of time in the Project Completion Schedule (the “Time Extension”) to the extent that completion

We would like to mention that the contractor should also be compensated in terms of cost (plus profit) for the delay events. Delay in handover of the Site/land should also be included as an event in this clause.



Upon receiving the Completion Certificate, the Contractor shall

We would like to mention that the in case the contractor fails in removing such


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Page 128 remove its equipment, materials, debris and temporary works from the Site within a period of 30 (thirty) days thereof, failing which the DMICDC-NSPCL may remove or cause to be removed, such equipment, materials, debris and temporary works and recover from the Contractor an amount equal to 125% (one hundred and twenty five per cent) of the actual cost of removal incurred by the DMICDC-NSPCL.

equipment, material debris etc., the client may recover from the contractor an amouny equal to 100% of the actual cost of removal incurred by the DMIDC - NSPCL.

unchanged.


(iii) proposed modifications, if any, to the Project Completion Schedule of the Model Solar Power Project. For the avoidance of doubt, the Parties expressly agree that, the Contract Price shall be increased or decreased, as the case may be, on account of Change of Scope, unless the parties mutually agree to the contrary, the total value of change of scope orders shall not exceed 20% (TWenty percent) of the Contract Price.

We would like to mention that that the total value of change of works shall be subject to value due to change in order. Kindly confirm.



Maintain and renew all Clearances/Permits which are

We would request the Client to consider Insurances during the O&M in their scope.


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Point 14, Page 134

required by the Contractor for operation and maintenance of the 1 MW micro-grid power plant.

Further, all the required fees to be in Client's scope.

unchanged.

23. Article 14, Clause 14.2.2, Point 91, Page 140

Painting of iron parts of array structures posts once in a year.

We would like to mention that painting of iron parts shall be subject to corrosion only. Please confirm.



DMICDC-NSPCL, at any time during a Contract Year, shall not be obliged to accept availability of less than hundred percent (100%) of the installed capacity and Capacity utilization as detailed below of the solar power plant of 1MW Micro grid Solar + Diesel Generator power plant.

We would like to mention that the availability of the solar project depends on the Grid connectivity and performance of free issue inverters and micro controller. It would be difficult to ascertain the availability of the plant and reason for the down time. We would request DMICDC to confirm the method of ascertaining the un availability.

It is not grid connected plant and there is a additional capacity of 1MW DG Set as stand by.


The EPC shall also ensure that the plant performance ratio (PR) of the 1 MWp PV solar power plant shall not be less than the 77% on completion of 1st year. Percentage degradation/year for PR will also be applicable from 2nd year onwards up to 10th year for computation of PR based on the % degradation of modules, as specified by module manufacturer. If for any Contract Year, it is found

We would like to mention that PR shall not be gauranteed as the working of solar plant depends on the working of DG set and load condition. In this case, there could be scenarios of Solar power curtailment due to un availability of sufficient load. Further, as the major equipment i.e modules, inveretrs and controllers are free issue, We would therefore not be able to give PR guarantee.


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that the EPC has not been able to maintain a minimum performance ratio (PR) computed on yearly basis on account of reasons solely attributable to the EPC, the non-compliance by EPC shall make EPC liable to pay the compensation @ Rs 12.00 per kwh for the shortfall from the guaranteed generation to the DMICDC-NSPCL.


Estimated daily power generation of diesel generator sets shall be calculated as per the norm of 3.65 kWh / litre of diesel or equivalent to gas

We would like to consider Clause no. 24 of Appendix1 with the following calculation i.e, specific gravity of Diesel 0.850 & Consumption shall have + 5% tolerance as per relevant IS / BS.



Defects Liability Period We would like to mention that DLP shall be for 1 year only subject to O&M is awarded to the contractor.



Contractor’s Failure to Rectify Defects

We would request that only an amount equivalent to what has been paid by the Client in such case be payable by the contractor. Please confirm.



Payment terms for EPC work We would request that the following payment terms be followed: 20% Advance against ABG 10% against approvals of drawings 65% of supply & delivery shall be against


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irrevocable LC at sight against supply of material at site on pro rata basis; 65% against civil and erection on pro rata basis 2.5% against successful commissioning 2.5% against Final Acceptance


Termination for DMICDC-NSPCL’s Convenience Notwithstanding anything stated hereinabove; the DMICDC-NSPCL may terminate this Agreement for convenience. The termination shall take effect 30 (thirty) days from the date of notice hereunder.

We would request that In this case, contractor should be paid the following: (a) any amounts due and payable to the Contractor till the date of the termination of this Contract; plus (b) all reasonable demobilization, severance, subcontractor cancellation charges and necessary costs and expenses directly resulting from such termination.


31. Appendix 8 Appendix-8 (Submission of drawings & documents)

We would request the Client that as the total duration for commissioning is 6 months, hence the bidder should get at least 30 days from LoA for submission of all drawings and documents.


32. General We would request the Client to confirm whether the contract shall be single or split contract into supply, civil and services.

Single contract

33. General Please confirm if the C form and road permits shall be provided by the Client.

C form will not be provided and only road permits will be provided.

34. General Please confirm if the customer who has to take the solar & DG owner has the requisite approvals from the authorities. Further,

Single Consumer. If any approval required at consumer side will be in EPC scope.

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please confirm if there is single consumer or multiple consumers.

35. General Please clarify if the spare feeder is available in the consumer HT panel and the route of cable from plant to the HT panel of consumer.

It will be in EPC scope.

Civil

36. Appendix-1, Clause No. 1.1, Page 2.

The frame and leg assemblies of the array structure shall be made up of MS angles / channels / pipes with hot dip galvanization. The minimum thickness of galvanization should be at least 86 microns with reference to IS: 2062-1992 and IS: 4759-1996 (Hot dipped galvanized steel) for 5mm thick - 610 GSM

We propose the following material specification for the MMS design: 1. 2.5mm Thk HDG Column of min. Steel grade E-250 Cold Form Steel with 80 micron Galvanization. 2. 1.6 mm Thk Pre-Galvanized Rafter of Steel Grade E-350 Cold Form Steel with 550 GSM coating thickness. 3. 550 MPA Galvalume Purlins of grade AZ-150. 4. HDG Cold form members of min. Steel grade E-250 to be used for Bracing. Kindly confirm.

The conditions given in the RFQ cum RFP will remain unchanged. However, EPC contractor shall submit the design data and raw material specification for approval before fabrication.


The minimum clearance between the lower edge of the module and the ground shall be above highest flood level at the site or minimum 800 mm, whichever is higher is considered.

We propose 500mm ground clearance for Fixed/Seasonal Tilt Structures. Kindly confirm.


38. Appendix-1, The array structure shall be so We propose the design wind speed to be in The conditions given in the RFQ

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Clause No. 1.5, Page 2.

designed that it will occupy minimum space without sacrificing the output from Solar PV panels at the same time it will withstand severe cyclonic storm with wind speed up to maximum 200 kmph.

accordance to IS:875 - Part III. Kindly confirm.

cum RFP will remain unchanged.


All fasteners shall be of Stainless steel - SS 304. Nut & bolts, supporting structures including Module Mounting Structures shall have to be adequately protected against all climatic condition.

We propose HDG MS bolts of Min grade 4.6 to be used for MMS Structural connections, while SS-304 Bolts will be used for Module Connections only. Kindly confirm.



Foundation drawings & designs shall be submitted to Owner for approval before starting the work. Civil works for foundations for module mounting structure, control room etc. shall commence only after the proper leveling. Care should be taken to maintain slopes and to prevent water logging at the site.

We propose Module mounting structure erection following the contour levels to the site. Thus there shall not be any requirement for Site Leveling for MMS erection. However, local leveling at the Control room location shall be as per approved site plans. Kindly confirm.



The structure design shall be appropriate with a factor of safety of not less than 1.5. The design

We propose the Structural FOS to be as per the guidelines of IS-800, IS-801 and IS-875. Kindly confirm.

Confirmed. Prior approval to be taken before finalizing the material.

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calculations shall be submitted to Owner for approval.


All materials shall be hot-rolled structural mild steel and/or high-strength structural steel and shall conform to ASTM A36 for structural steel and to ASTM A440 for high strength structural steel.

We propose that all structural steel material shall comply to respective IS code for the material specification. Kindly confirm.



Eyebolts and Nuts All materials for eyebolts shall be forged steel conforming to ASTM A235 class C




Connection Bolts U Bolts and Nuts. All connection bolts, U-Bolts and nuts shall conform to ASTM A394.




Step Bolts Step bolts shall conform to ASTM A307 and shall be galvanized.




Steel Pipes Steel Pipes shall conform to the requirements of ASTM A53 Grade B. All pipes shall be galvanised.




2.6 Anchor Bolts All anchor bolts shall conform to ASTM A36 and shall be galvanized. The minimum



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diameter of anchor bolt shall be 16 millimetre.


Design Load: a) Wind Load On steel structures : 196 kg/m2 On line trap, disconnecting switch : 53 kg/m2 On overhead ground wire, conductor : 53 kg/m2 On porcelain insulator strings and all other section : 53 kg/m2

We propose that the wind load on structures shall be in accordance with the IS-875 part III. Kindly confirm.

EPC Contractor has to submit a design calculation as per IS-875 part-III for approval. However site falls under category-4.


Seismic Coefficient A coefficient of 0.12 shall be used.

We propose that the seismic parameters shall be in accordance with IS -1893. Kindly confirm.



Ultimate stress allowed in design shall be as follows: Members: Buckling As per ASCE Manuals and Reports on Engineering Tension Prachie - No. 52 Bearing Less than 1.00 Fy Bolts Less than 1.80 Fy Shear Less than 0.60 Fu Bearing Less than 1.00 Fu Where: Fy: Yield point of steel member materials Fu: Ultimate tensile stress of bolt materials

We propose that the Ultimate stresses allowed in the design shall be in compliance to respective IS codes. Kindly confirm.


51. Appendix-1, Limit of Effective Slenderness We propose the Limit of Effective Confirmed. Prior approval to be

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Clause No. 3.9, Page 116.

Ratio Slenderness Ratio allowed in the design shall be in compliance to respective IS codes. Kindly confirm.

taken before finalizing the material.

52. Appendix-1, Clause No. 7.C, Page 119.

c. Uniformity of Coating: The uniformity of coating test shall be made in accordance with ASTM A239

We propose that the uniformity of coating shall be in accordance with the respective IS code only. Kindly confirm.


53. Appendix-1, Section 26 Clause No. 1.1, Page 156.

Topographical / Contour survey shall be conducted on the proposed site at 5 m interval by Plain Table or any other suitable standard method of survey

We propose the contour survey at an interval of 25m. Kindly confirm.

5 X 5 array should be followed.

54. Appendix-1, Section 26 Clause No. 9.1, Page 159

The module structure foundations should be RCC foundation columns made with cement concrete as defined in IS: 456 including curing.

We propose Column embedment in the concrete Pile without any Steel Reinforcement as foundation system. Kindly confirm.



The minimum clearance between lower edge of the PV and ground level shall be above High Flood Level (HFL) or minimum of 800 mm while making due consideration will be given to Weight of module assembly. The design wind speed (maximum) considered shall be of 200 kmph.

Same as S.NO. 2 & 3. Kindly confirm.


56. Appendix-1, Section 26

Formation of paver block internal pathways.

We do not envisage paver block internal pathways as there is minimal Human


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Clause No. 13.1, Page 160

movement inside the plant. Kindly confirm. unchanged.


Formation of Asphalt road from the main entry gate to control room building.

We propose WBM road from the main entry gate to control room building. Kindly confirm.



These roads are to be designed optimally to carry the crane load

We propose roads to be designed in accordance with relevant IRC standard. We would also like to inform that there will not be any heavy crane movement inside the plant and thus Crane load shall be avoided. Kindly confirm.


59. Appendix-1, Section 26 Clause No. 14.k.i, Page 164

GI pipes of Medium quality conforming to IS: 1239 (Part I – 1990) and IS 1795 – 1982 (reaffirmed 1990) for Mild Steel pipes shall be used for all water supply and plumbing works.

We recommend PVC pipes for module cleaning system. Kindly confirm.



The Contractor shall install required number of watch towers along the fencing of the power plant. The size of each tower will be 2 m x 2 m and height should be 2 m

We do not recommend Watch tower as per standard industry practice. Kindly confirm.

Watch tower is required. EPC Contractor has to submit appropriate design for the watch tower.


The Contractor shall construct 2 meter high chain link fence fixed on MS angle poles.

Contradictory to S.No. 1 We request to kindly clarify the height and arrangement of Plant Fencing. Kindly confirm.


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300 mm high above ground level, UCR stone masonry wall shall be provided below the chain link fencing all along the periphery of the fencing. The height of the fencing above the UCR stone masonry shall be 2 m.

We do not recommend a stone masonry toe wall. Kindly confirm.


DG SET

63. Clause No. 14.2.4.2 of RfQ cum RfP Page 140

Fuel Supply Terms & Conditions

The DG set shouldn’t be loaded below 60% of rated capacity to achieve 3.65 kWh/litre. Kindly confirm. Also, SWPL would like to consider Clause no. 24 of Appendix1 with the following calculation i.e, specific gravity of Diesel 0.850 & Consumption shall have + 5% tolerance as per relevant IS / BS.


64. Clause No. 14.2.4.3 of RfQ cum RfP Page 141

Diesel Storage Tank

Diesel Tank layout (Appendix 3) shows provision for 2 no's 15 kL tank which is equivalent to 30 kL capacity only. However as per clause 14.2.4.3 (a) of Page 141 of RFQ cum RFP) estimated daily power generation is 3.65 kWh/litre and considering 1 MW power generation, per hour consumption becomes 274 litre (1MW/3.65). Now we are assuming 12 hours of daily

Our diesel storage requirement is for 15days with a free board of three days of storage day’s capacity. Accordingly EPC has to design the tank capacity. The applicable permits will be taken by EPC contractor.

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operation of DG Set and tender states diesel tank shall store 18 days of fuel requirement. Total required capacity becomes (274 Litres x 12 Hours x 18 days= 59,184 Litres). Hence we will suggest diesel tank of 75 kL capacity with (3x25 kL capacity). Please confirm on the same.

65. Appendix-1, Section 24 Page 140

Detailed technical specifications for the Diesel Generator Set

In reference to smart grid concept, we will provide forward synchronization only.

OK confirmed.


Technical Data Sheet for the DG set - Alternator Insulation : F Class

We will provide H class insulation which is standard industrial practice and will meet the requirement. Kindly confirm.

Acceptable.


Technical Data Sheet for the DG set - Operating fuel

Operating fuel system will be HSD only, LDO is not applicable.

Confirmed. Separate quote may be given for dual fuel firing engine (HSD/Gas).


Technical Data Sheet for the DG set - Type of Cooling

It is water cooled radiator type DG set. OK.

69. Appendix-1, Section 26 Clause 20 Page 166

Diesel Generator Room Please clarify construction of DG room will be in scope of EPC Contractor or DMICDC.

EPC Scope.

70. Appendix-1, Section 26 Clause 20.3 Page 167

Diesel Generator Room – The room shall be designed with RCC structure & roof slab.

Since DG set will be provided with acoustic enclosure hence roof slab is not required, industrial type shed would suffice the purpose. Please confirm on the same.


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Diesel Generator Room Three no. diesel generator will be installed in the DG shed, kindly confirm the location of balance 2 DG set.

The balance two DG also to be installed in same room.


Diesel Generator Room

Instead of vehicular approach, refilling of tank will be done with the method of fuel transfer system with required pumps & starter panels.

Alternate option for transfer of fuel from tanker to storage tank may be adopted for refilling, however ever vehicular approach is required.


Diesel Storage Tank Please confirm diesel storage tank will be underground type, over ground type or it will be choice of EPC contractor.

As per applicable Norms.

74. General

How many hours shall we assume for each generator and at what load factor?

It will vary based on the demand by the consumer but 1MW maximum power will be supplied to consumer. During day time solar power will be given first preference and balance will be supplied by DG.

75. General

Appendix 1 Page 141 'Prime Power (PRP)' states fuel consumption tolerance of +5%. Is this tolerance also allowed on estimated daily power generation of 3.65 kWh/litre?

Only diesel will be supplied by the client to EPC contractor @3.65 kWh/litre.

76. General

Scope of power cable, control cable & earthing system is not clear, request you to clarify the same.

EPC Scope.

77. General We have not considered Load for the The same will be provided by

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purpose of testing the DG sets at site. It shall be provided by client at the time of testing.

the client.

ELECTRICAL

78. Page 68, Clause 5.1.2 Section 5

Land Available : 10 Acres We request to provide the Contour layout of proposed PV plant

It will be done by EPC.


Technology (Fixed/SAT/Seasonal) As per the details in Appendix 1, we understand that fixed type structures have to be used. Kindly confirm

Fixed.

80. Page 113, Clause 8.1

The DMICDC-NSPCL shall be responsible for: (a) acquiring and providing Right of Way on the Site in accordance with the alignment finalized by the DMICDC-NSPCL, free from all encroachments and encumbrances, and free access thereto for the execution of this Agreement; and (b) Obtaining licenses and permits for environment clearance for the Solar Power Project.

We would like to mention that i in Annexure-3,Cl No: 7.3 (Pg: 192), it is required by EPC contractor to obtain permit from various state agencies. Kindly clarify. We request that all permits and approvals including Rows be in Client's scope.


81. Page 113, Annexure-3

Step down Transformer at Mikuni (Neemrana Industry) with tariff meter & switch gear

Please clarify as to where this step down transformer along with tariff meter shall be used. We requests to clarify.

At end user/consumer i.e. M/s MIKUNI, Neemrana.

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EPC Contractor shall provide Pyranometer for measuring incident global solar radiation.

We request the Client that the quantity for the same be mentioned. Please confirm.

One.

83. Appendix-1, Section 2 Clause 2.5, 2.6 Page 6

ULTRASONIC WIND SENSOR & Humidity sensor

We request to confirm on the quantity of Wind sensor and Humidity sensor.

One each.

84. Appendix-1, Section 3 Clause 3.3.3 Page 11

The entire earthing system should be made with G.I flat of adequate cross-section as per design. Minimum 3 meter long, 40 mm dia. perforated GI pipe / Copper plate (600 mm x 600 mm x 12 mm) earthing electrodes including accessories shall be provided along with brick masonry enclosure with cast iron cover plate of 600 mm x 600 mm size with pad - locking arrangement, water pipe arrangement for periodical watering of the earthing electrode stations.

We request for maintenance free earthing system. Please confirm.



A PDB panel in the control room shall be provided in between PCU and 11 / 0.30 kV-0.30 kV transformers.

We understand that PDB panel is a part of PCU itself. As PCU has outgoing ACB at AC side which have inbuilt protection features, hence PDB are not required separately between inverter and

Ok confirmed. Prior approval will be taken by EPC contractor during finalization of design.

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transformer and also LV voltage of inverter transformer shall be as per the inverter design. Please confirm.


The PDB incomer shall be a four (4) pole MCCB with thermal over current and earth fault releases.

We understand that the PDB corresponds to inverter panel. Hence, 4 pole MCCB to that of PDB shall not be applicable. Please confirm.

Ok confirmed. Prior approval will be taken by EPC contractor during finalization of design.


DC Bus & Panel should be provided for the incoming DC supply from Array Yard.

We understand that it corresponds to String combiner box. Kindly confirm.

Confirmed.

88. Appendix-1, Clause 4 Page 26

Temp. rise in °C above ambient :50 ° C - Oil, 55° C – Winding

We would like to mention that as per IS, same is applicable for design ambient of 50 deg C. For a design ambient of 45 deg C, temperature rise shall be corrected to 55 and 60 deg C respectively. Please confirm.

We will accept as per IS.

89. Appendix-1, Clause 13.a Page 30

The maximum flux density in any part of the core & yoke at the rated MVA, voltage & frequency shall be such that under 110% continuous voltage condition it does not exceed 1.9 Tesla.

We would like to mention that as per standards, the maximum flux density in inverter transformer shall be 1.6-1.7. SWPL requests to confirm.



ACSR / AAAC ALUMINIUM CONDUCTOR

We request to clarify the scope of supply and erection of T/L conductor. Also please clarify if this corresponds to the line connecting output of inverter transformer to 11 kV grid.

It will be applicable only if the transmission line is laid down overhead.

91. Appendix-1, CONFIGURATION OF THE We understand that LBS is not required at Ok confirmed. Prior approval

Sr.No.


Clause 1 Page 75

SWITCHGEAR ( 1 I/C + 1 O/G Transformer Feeders)

the outgoing feeder of each inverter transformer. And only VCB shall suit the requirement of inverter transformer protection and isolation.

will be taken by EPC contractor during finalization of design.

92. Appendix-1, Clause 1.1.b Page 95

The configuration of the D.C. System shall be as per the Single Line Diagram of the system.

We would like to mention that relevant SLD for DC system is not found in the tender. We request to furnish the same.

It will be prepared by EPC.

93. Appendix-1, Clause 5.1.1 Page 149

The earthing for array and LT power system shall be made with GI pipe, 4.5 m long, 40 mm diameter including accessories and providing masonry enclosure with cast iron cover plate having locking arrangement, watering pipe using charcoal or coke and salt as required as per provisions of IS: 3043.

We would like to mention that generally, the GI pipes are 3 m or 3.5 m. Please confirm. Also, earth pits shall be maintenance free earth pits. Please confirm.

Ok confirmed. Prior approval to be taken before finalizing the material.


The power supply to pre identified consumers / industries at Neemrana shall be at 11 kV through the micro - grid.

We request to clarify if required bay is available at interconnecting substation to connect the 11kV line.

Bay is not required. Step Down Transformer will be installed at end user/consumer and termination at LT panel will be scope of EPC.


The HV cables laid to and from the line shall be laid in buried trenches along the horizontal route length and through protection of GI pipes at the poles.

We request to clarify if 11kV power evacuation is through overhead line or through buried trench.

It will be decided in consultation of RIICO officials at Neemrana office during execution.

96. Appendix-1, Rated mainly active load breaking Please clarify if values through 5.4 to 5.7 Refer Corrigendum 1.

Sr.No.


Clause 5 Page 179

capacity : 10A shall be corrected to kA instead of "A". It will be 10KA.


11kV / 0.433kV 3 phase, 50 Hz, YNd11, oil filled, Power Transformer of approved make shall be utilized.

However, in the technical specification vector group is indicated as Dyn 11. Please clarify on the discrepancy.

Refer Corrigendum 1. It will be Dyn11.


Transformer shall be provided with an On Load Tap Changer (OLTC) switch with tapings of at least (+) 10% to (-) 15% with individual steps of 1.25%

However, in the technical specification tapping range is indicated as (+) 10% to (-) 10%. Please clarify on the discrepancy.

Refer Corrigendum 1. It will be (+) 10% to (-) 10%.

99. Appendix-1, Clause 14.h Page 202

The maximum flux density in any part of the core & yoke at the rated MVA, voltage & frequency shall be such that under 110% continuous voltage condition it does not exceed 1.9 Tesla.

As per std, the maximum flux density in Power transformer shall be 1.6-1.7. SWPL requests to confirm.


100. Appendix-3 Electrical SLD

Inverter as indicated in Electrical SLD is two nos. of 500kW each.

Please clarify if we can use 1000kW centralised inverter.

It will be supplied by the client and these are fixed 500KWx2No.s.


LBS is indicated in outgoing of inverter transformer.

We understand that LBS is not required at the outgoing feeder of each inverter transformer. And only VCB shall suit the requirement of inverter transformer protection and isolation.



In 11kV Grid connected feeder, two nos. of VCB back to back is indicated.

We understand that two nos. of VCB is not required at the grid connected feeder. And only one no. VCB shall suit the


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requirement.

103. Appendix-3 Electrical SLD Outgoing line of Standby DG

We request to clarify if the outgoing line of standby DG is bus duct or cable. Please confirm.

Cable

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