Retender- Supply , Installation , Testing , Commissioning In Door - Metal Clad with Vacuum Circuit Breaker (VCB) , 11Kv , 1600A , 31.5Ka/3 Sec includes All Material And Works required at Bir Nasser, Aden City, Yemen

New amendment added #3: Amendment #3The purpose of the amendment is to:Amend the technical specification link to add the amended docuement for Metalclad T.S.- Final and replace it with the previous one. The amended clauases related to  Air insulated Switchgear are highlighted in yellow.Therefore, the follwoing amendment is in effect:Amend  e-Sourcing document tab to update the link of the technical specifications to enclude the new document tilted "Amendment 2- Metalclad T.S-final"All other terms and conditions remain the same

New clarification added: Question 1:  With reference to item-4   DC EQUIPEMENT "Supply, installation, testing and commissioning of one set of Ni-Cd Battery System, 110 VDC, 200 Ah complete with two chargers (Manual/Auto, Parallel/Independent operating facilities), steel structure and fuse box". Kindly provide the details Batteries and chargers technical specificaton  Also, "Supply, installation, testing and commissioning of AC and DC Panel". Kindly provide the following details  Single Line Diagram (SLD) of AC and DC panels. Providing the above information will enable us to submit technically compliant.Answer 1: Please refer to the RFQ technical specificationsQuestion 2:  In view of the complexity and large scope of the project, which necessitates obtaining offers and clarifications from multiple suppliers, we would appreciate your kind consideration to extend the deadline for submission.Answer2: We cannot grant more extension. The tender deadline remians the sameQuestion 3:  Civil Work – CT-02. Kindly confirm whether CT-02 refers to the concrete foundations/pedestals beneath the generators, as indicated in the referenced drawing/details.Answer 3: Please note that there is no generators required in this RFQ , however this confirm for transformersQuestion 4: The Amendment Metal Clad switchgear specifications file is mentioned specifications for Gas insulated switchgear not for Air insulated Switchgear.Question 4. 1:  Page No 5, point " 1- general requirements " the phrase " Circuit breakers, disconnectors, VTs, CTs, cable termination chambers, and any other chambers and components must be capable of withstanding a gas overpressure of 130% of normal operating pressure continuously.", this sentence make it clear it is Gas insulated, please advise. Answer 4.1:  An amendment will published soon. This sentence shall be deleted from the new amendment.Question 4.2:  Tightness test page No 14 point 16.1 a " IEC 62271-200 tightness test " & page No 15 Clause No 7.8 " Pressure tests of gas filled compartment ", these kind of tests are only for Gas insulated switchgear not for Air insulated Switchgear, please advise.Answer 4.2: An amendment will published soon. This sentence shall be deleted from the new amendment. Question 5:  DISCONNECTING AND EARTHING SWITCHES, in page No 9 point No 8 " DISCONNECTING AND EARTHING SWITCHES ", it is mentioned that " The earth switches and disconnector shall employ motor operation mechanism. In addition, emergency hand operation shall be provided ", motor operation for disconnector & earthing switch are only in GIS not in AIS whichgear, please advise. Answer 5: Even though  earth switches and disconnectors (isolators) with motor-operated mechanisms are standard in SF6 panels, it is frequently utilized in Air-Insulated Switchgear (AIS). While older or simpler AIS installations might rely on manual hand-cranks, modern AIS upgrades almost always include motorized mechanisms to bring them up to modern and safety standards.Question 6:  Busbar extension while adjacent bays energized, this feature is only for GIS Switchgear, please advise.Answer 6: The delivery of the switchboard should be such as to enable bay extensions for the future works , and to confirm that  installed equipment  is applicable and without complete shutdown, the switchboard  should utilize the included built-in physical isolation barriers  bus section,This creates an absolute firewall between the old, live system and the new, un-commissioned extension as function.Question 7:   We kindly request  to extend the tender submission deadline for more time, in order to enable us to prepare and submit our best financial offer and the best technical specifications.Answer 7: We cannot grant more extension. The tender deadline remians the same

New amendment added #2: Amendment #1The purpose of the amendment is to:Extend the clarification deadline to 21 June, 2026Extend the tender's deadline to 28 June ,2026Amend the drawings link to add the amended docuement for ELECTRICAL WORKS DRAWINGS and replace it with the previous oneAmend and upload document "Amendment 1-  BOQ_ADN-017" item (15.2) in the BOQ is amended to read as follows: same the item of (15.1) but without shading sun (2,0 m x 1,2 m).Therefore, the follwoing amendment is in effect:Amend e-Sourcing genderal tab to extend clarificaion and tender's deadline  Amend  e-Sourcing document tab to add the update tthe following documents Amendment 2- ELECTRICAL WORKS DRAWINGS for drawingsAmendment 1-  BOQ_ADN-017"All other terms and conditions remain the same

New clarification added: Question 1: Please note that, based on your amendment file titled "ELECTRICAL WORKS DRAWINGS", Page 5, Drawing No. E-04 (SLD, Protection & Metering Diagram), the switchgear indicated is of the GIS type (SF6 Circuit Breaker). However, the BOQ, the amended file "Metalclad T.S. – Final", and the Technical Questionnaire clearly specify AIS-type switchgear, namely 33 kV Metal-Clad VCB Switchgear and 11 kV Metal-Clad VCB Switchgear. Therefore, we kindly request confirmation of the required switchgear type (AIS or GIS), as there appears to be a discrepancy between the drawings and the tender documents. Please note that the selection of AIS versus GIS switchgear will have a significant impact on the technical proposal and pricing.Answer 1: This to confirm that the requirement is VCB metal-clad switchgearQuestion 2: Refrding to DC EQUIPEMENT in the Technical Questionnaire the requirment for item# 5.8  (System efficiency 100% Load Up to 94%). Our clarification Request is: The efficiency is only 90% at 100% load.— is that acceptable?Answer 2: Regarding the requirement for a system efficiency of up to 94% at 100% load, please adhere to the RFQ condition and requirement. Question 3. item No 3.2 Metering unit, in the BOQ is one, but in the drawings are 2 metering, the standard configuration are to be 2 units as we have bus coupler, please advise.Answer 3: While the drawing correctly represents the standard configuration requiring two (2) metering units due to the split-bus arrangement with a bus coupler, only one unit is required for the current phase. The public electrical corporation mandates only a single point of revenue metering on the main incoming feeder. The second bus section is dedicated to internal power distribution and standby use; therefore, it will utilize standard multifunction meters embedded within the VCB panel rather than a separate metering cubicle. We will update the drawing to explicitly clarify this distinction.Question 4. Item No 3.4, it was mentioned that the outgoing feeder 630A with quantity 4 pcs, but in the drawings are 2 outgoing feeders 1250A named " TO TR 2 (IC) & TO TR 1(IC)" and another one as spare 630A named " O/G-4 SPARE", please advise which one is correct Answer 4: Please note that O/G-X refers to the outgoing feeders, of which there are actually 4, as per the drawing and BoQ Item No. 3.4. Meanwhile, Item No. 3.5 is for the incoming supply from either the generator or the transformer, where the drawing matches BoQ Item No. 3.5 Question 5. BOQ item No 3.5, generator panels 1250A and quantity is 2, but in the drawings are 630A with quantity 3 breakers named as "" O/G-1 & O/G-2 & O/G-3"", please advise which one is correct? Answer 5: Please note that O/G-X refers to the outgoing feeders, of which there are actually 4, as per the drawing and BoQ Item No. 3.4. Meanwhile, Item No. 3.5 is for the incoming supply from either the generator or the transformer, where the drawing matches BoQ Item No. 3.5Question 6: Regarding to Transformers, it was mentioned in the BOQ 1.1 & 1.3 the type of onload tap changer OLTC as MR Type that means to be manufactured by "Maschinenfabrik Reinhausen", is it mandatory to buy from the same manufacturer or it can another manufacturer.Answer 6: Rather than representing a specific brand, the 'MR' designation defines a technical standard. Specifically, 'MR Type' serves as the baseline benchmark for the minimum engineering requirements.  Question 7: Regarding to BOQ item No 2 33KV Metal Clad VCB Switchgear & item No 3 11Kv Metal Clad VCB Switchgear, it is mentioned as VCB type, but in the drawings as SF6 type and in the technical specifications as VCB, either the drawings to be amended by changing the SF-6 to VCB or changing the description in BOQ and the specifications in the technical specification file.Answer 7: This to confirm that the requirement is VCB metal-clad switchgear Question 8: Could you please extend the submitting deadline?Answer 8: An extesnion will be granted. Please check eSourcing Electrical Switch Gear House – Item No. 15.2Question 9 : Item No. 15.2 refers to Item No. 14.1; however, there is no Item No. 14.1 in the BOQ. Kindly clarify the correct reference.Answer 9: Please refer to the amendment BOQ. it is 15.1

New clarification added: Question 1 : regarding the item 1.1 Transformer, The vector group of the transformer stated as YNyn0d11  however the YNyn0d11  indicates a three-winding structure, but the given voltage ratio is 33kV/11kV ! please clarify the actual winding quantity and complete voltage levels of the transformer or What are the full voltage ratings of all three windings corresponding to the vector group YNyn0d11 ?Answer 1: The TS explicitly confirms the requirement  of a 5MVA, 33/11 kV step-down power transformer featuring the YNyn0d11 vector group. Rather than treating this as a standard dual-output transformer feeding two distinct external loads, the document outlines specific compliance rules for how this configuration must be handled. The tertiary delta winding serves as  entirely for harmonic suppression , neutral stabilization, and fault-handling capability, it does not serve an external distribution load or auxiliary system voltage. Consequently, no secondary voltage rating is specified or required for it.The vector group YNyn0d11 specified for the 5MVA transformer is correct for this step-down application and aligns fully with the system requirements outlined in Section 2 of the Technical Specification.  Per clauses 2.1 and 2.2, both the 33kV transmission system and the 11kV distribution system are solidly earthed. To accommodate solid grounding on both sides, a star-star (YNyn) winding configuration is mandatory. The capital letters (YN) correctly designate the 33kV high-voltage primary winding , while the lowercase letters (yn0) designate the 11kV stepped-down secondary winding.  The d11 designation represents a tertiary delta winding included strictly for harmonic suppression and neutral stabilization, as required by clause 2.8 of the specification. It does not indicate a step-up configuration. Please  proceed as specified.Question 2: please also confirm the Impedance requirement?Answer 2: We confirm that the short-circuit impedance requirement will strictly comply with Clause 2.10 (Impedance) of the Technical Specification. Question 3: Could you please inform the specific no-load loss and load loss requirements you need for the 5MVA & 150KVA Transformers, Since the IEC standard does not specify specific numerical values for losses, it only specifies the tolerances.Answer 3: Per the "Losses and Evaluation of Losses" clauses , the manufacturer is required to propose their most competitive, optimized design losses. The IEC permitted tolerances are part of routine testing. Question 4: Please confirm whether the 11kV and 33kV in this tender are (gas-insulated switchgear) or (air-insulated switchgear). The current drawings and the Electrical Technical Specification appear inconsistent.Answer 4: This to confirm that the requirement is VCB metal-clad switchgear Question 5: Please confirm whether the circuit breaker used in the switchgear is a vacuum circuit breaker (VCB) or an SF₆ circuit breaker.Answer 5: This to confirm that the requirement is VCB metal-clad switchgearQuestion 6 :The tender documents indicate that the switchgear, circuit breaker, disconnector (isolating switch), earthing switch, CT, PT, and insulation components all should be provided with IEC type test reports. In addition, the test report date for the switchgear must be within six years. Please confirm whether these requirements are mandatory.Answer 6: Upon delivery the compliance with IEC type test reports is a requirement. Under Section 2, Clause 33.1 (Type Tests), the document explicitly mandates: "Type test reports older than 6 years will not be acceptable." Question 7 :The Electrical Technical Specification indicates that the circuit breaker provide evidence of switching capability for capacitor bank applications. Please provide a template of such evidence for our reference in preparing the submission.Answer 7: Upon delivery the specification explicitly states that the circuit breakers must be backed by valid type tests according to IEC 62271-100.  Clarification RequestQuestion 8: Electrical Switch Gear House – Item No. 18. Please clarify the required width of the steps.Answer 8: Item No. 18 is fully detailed in the BOQ and aligns with drawing page CW-05." "Item No. 6 is fully detailed in the BOQ and aligns with drawing page CT-02."​Question 9: Fence and Transformer Area Works – Item No. 6. No drawings or details have been provided for this item. Kindly share the relevant drawings/specifications, as we are unable to price it accurately without the required information.Answer 9: Item No. 6 is fully detailed in the BOQ and aligns with drawing page CT-02."Question 10: Regarding Vendor Submission - General  Questionnaire Main Tender - Item # 1 : (Has your firm/organization been contracted by UNOPS in the past? If yes, please indicate the kind of work) . Option Yes and No is not available , when we fill the table of this item and click (save) button  , the content of this table disappear , also it appear the qustionries are still incompleted because the answer to this item has not been activated which may be is due to the missing of option Yes or No for activiation .Kindly , we would appreciate your advice.Answer 10:  This part is not Yes/No option. You need to add short free text. Question 11: Regarding to CB 11kv/33kv, it was written in the drawings as the medium of circuit breaker is SF6, while in the technical specifications were written as Vacuum type, which one we should consider.Answer 11: This to confirm that the requirement is VCB metal-clad switchgearQuestion 12. If we consider the one in drawings, does it mean by SF6 CB is the circuit breaker itself is SF6 or the switchgear is SF6 & the breaker itself is Vacuum type as almost all companies do this configurationAnswer 12: This to confirm that the requirement is VCB metal-clad switchgear Dear Sir,Question 13: Please note that, based on your amendment file titled "ELECTRICAL WORKS DRAWINGS", Page 5, Drawing No. E-04 (SLD, Protection & Metering Diagram), the switchgear indicated is of the GIS type (SF6 Circuit Breaker).However, the BOQ, the amended file "Metalclad T.S. – Final", and the Technical Questionnaire clearly specify AIS-type switchgear, namely 33 kV Metal-Clad VCB Switchgear and 11 kV Metal-Clad VCB Switchgear.Therefore, we kindly request confirmation of the required switchgear type (AIS or GIS), as there appears to be a discrepancy between the drawings and the tender documents.Please note that the selection of AIS versus GIS switchgear will have a significant impact on the technical proposal and pricing.Answer 13: This to confirm that the requirement is VCB metal-clad switchgear.

New clarification added: Question 1: Circuit Breaker Type and Switchgear Insulation: On Page 2 of the document "Metalclad T.S. - Final", Section A - 33kV SWITCHGEAR specifies a 1250A VCB breaker, and on Page 17, Section B - 11kV VCB METALCLAD SWITCHGEAR also requires a 1250A VCB. The BOQ similarly specifies 33kV Metal Clad VCB Switchgear and 11kV Metal Clad VCB Switchgear. However, the latest drawing "SLD, PROTECTION & METERING DIAGRAM" (Drawing No. E-04) indicates that all circuit breakers are SF6 Circuit Breakers. In addition, based on the space limitations shown in "CONTROL ROOM AND TRANSFORMER LAYOUT" (Drawing No. E-05), the allocated area for the 33kV switchgear panels appears suitable only for compact gas-insulated switchgear utilizing SF6 insulation. Could you please confirm whether the quotation should be based on SF6-insulated switchgear and SF6 circuit breakers, or whether VCB metal-clad switchgear remains the required solution?Answer 1: This to confirm that the requirement is VCB metal-clad switchgearQuestion 2:  Busbar Extension and Bus-Sectionalizer Requirement: Page 4 of the document "Metalclad T.S. - Final" states: "The design of the switchboard should be such as to enable bay extensions at either end with minimum disturbance to the installed equipment and without complete shutdown of the switchboard. The design shall allow high-voltage testing of the extended busbar section and bays while the other busbar sections and bays are in normal operation." Based on our review of the latest SLD, PROTECTION & METERING DIAGRAM (Drawing No. E-04), this requirement can only be fully achieved by incorporating an additional bus-section/bus-coupler switchgear panel with suitable isolation facilities. Without such a panel, busbar extension and high-voltage testing of the extended section cannot be performed while maintaining normal operation of the existing switchboard. Since the addition of this panel would result in a deviation from the current BOQ scope, please clarify whether the inclusion of a bus-section switchgear panel is mandatory to comply with this requirement.Answer 2: The delivery of the switchboard should be such as to enable bay extensions for the future works , and to confirm that  installed equipment  is applicable and without complete shutdown, the switchboard  should utilize the included built-in physical isolation barriers  bus section,This creates an absolute firewall between the old, live system and the new, un-commissioned extension as function.Question 3: Transformer Tertiary Winding Parameters: The BOQ specifies: "Supply, installation, testing and commissioning of a 5MVA, 33/11kV step-down power transformer with (MR) ON-load tap changer, voltage variation range +5%, -15% at 1.25% step voltage, vector group YNyn0d11, outdoor use, as per Technical Specification." Upon reviewing the latest SLD, PROTECTION & METERING DIAGRAM (Drawing No. E-04), we noted that the tertiary winding parameters are not specified. Both the tertiary winding voltage level and capacity are absent from the documentation. Based on the specified vector group YNyn0d11, we understand that the delta tertiary winding is intended primarily as a stabilizing winding to improve system performance and suppress harmonic components. In the absence of specific requirements, we propose adopting a standard tertiary winding design with:Voltage rating: 11kV (same as the secondary winding)Capacity: 500–1000 kVA (stabilizing winding only)Please confirm whether this assumption is acceptable or provide the required tertiary winding voltage and capacity ratings.Answer 3: The TS explicitly confirms the requirement  of a 5MVA, 33/11 kV step-down power transformer featuring the YNyn0d11 vector group. Rather than treating this as a standard dual-output transformer feeding two distinct external loads, the document outlines specific compliance rules for how this configuration must be handled. The tertiary delta winding serves as  entirely for harmonic suppression , neutral stabilization, and fault-handling capability, it does not serve an external distribution load or auxiliary system voltage. Consequently, no secondary voltage rating is specified or required for it.The vector group YNyn0d11 specified for the 5MVA transformer is correct for this step-down application and aligns fully with the system requirements outlined in Section 2 of the Technical Specification.  Per clauses 2.1 and 2.2, both the 33kV transmission system and the 11kV distribution system are solidly earthed. To accommodate solid grounding on both sides, a star-star (YNyn) winding configuration is mandatory. The capital letters (YN) correctly designate the 33kV high-voltage primary winding , while the lowercase letters (yn0) designate the 11kV stepped-down secondary winding.  The d11 designation represents a tertiary delta winding included strictly for harmonic suppression and neutral stabilization, as required by clause 2.8 of the specification. It does not indicate a step-up configuration. Please  proceed as specified. 

New clarification added: Question 1:  Is acceptable to supply 11 kv & 33 kv metal clad  switchgear of SF6 ?Anawer 1: Please refer to the RFQ condition and requirementQuestion 2:  Electrical Metalclad T.S - Item ( 29.0- SPECIAL TOOLS) - cited that : " A detailed list shall be provided for the special tools/ accessories included in the offer " , and " These shall be to the approval of the Authority"  , also "All such necessary items shall be deemed to be included in the contract price. Upon commissioning, these special tools and accessories shall be handed over to the Authority in good condition."  . Kindly specify the detailes of the requested Special tools and confirm.Answer 2: Special Tools' means the manufacturer-recommended tools and accessories essential for performing both routine and emergency maintenance, without which the equipment cannot be properly serviced, it could not specify the details as each manufacturer has its own standardQuestoin 3: Electrical Metalclad T.S - Item ( 31.0 - SPARES AND ACCESSORIES) - Cited that : " Recommended spares and accessories shall be listed in the enclosed schedule for11Kv& 33KV switchgears and control gears for satisfactory operation of the switchgears and control gears for three years after commissioning" . Kindly provide us this schedule and specify the detailes of the requested Spare and accessories , also confirm if the price to be included in BOQ . or not?Answer 3: SPARES AND ACCESSORIES , These are the components identified by the manufacturer that are most likely to degrade, wear out, or fail during normal use. It could not specify the details as each manufacturer has its own standard. Question 4: Electrical Metalclad T.S - Item ( 30.0- ERECTION, OPERATION & MAINTENANCE MANUALS) Cited that :  " A separate volume shall cover all tests reports including routine test reports for complete switchgears, CTs and VTs, relays and other accessories and other tests reports witnessed by PEC Engineers." , Also Item (32.0- Tests)  required testing and inspection  at manufacturer’s works in presence of CLIENT inspectors / representatives also it's cited that  The balance items not ready during the inspection shall be subject to further inspection by PEC?therefore the follwing to be clarified:   a- Please confirm whether these tests must be performed in the presence of the client or not . With Considering the resulting financial impact and the time required .  b- Please confirm that the routine tests will be performed directly by the factory without the need for independent observer from internationally accredited test lab.  c- Please explain what is meant by PEC and the difference between it and the client.Answer 4: All the required is the ERECTION, OPERATION & MAINTENANCE MANUALS , Routine Tests: These will be performed directly by the factory’s QC department using calibrated instruments. The  independent, internationally accredited observer is not required. However it gives more confidence to the end-user/beneficiary .  PEC (Public Electricity Corporation) while the CLIENT is  the utility end-user/beneficiary AWSLC,  All certified routine and test reports will be compiled into a single volume and handed over  upon project completion.The client ("The Authority") has the right to send their engineers to the manufacturer's factory to witness the testing of the relays and Bay Control Protection Units (BCPUs). They aren't saying they definitely will go, but they are reserving the right to do so.The offer  price must include all costs related to conducting the tests at the factory, setting up the inspection, using the testing facilities, and providing the test reports. It cannot charge extra later for hosting the inspection.The client will handle their own travel logistics. It does not need to budget for the client engineers' plane tickets, hotel stays, or daily expenses.5- Electrical Power Transformer T.S - Item (2-34 : Tests) , we understand , the tests to be performed directly by the factory without  presence of CLIENT inspectors / representatives and results to be submitted to the client , Kindly confirm .Answer 5: Routine Tests: These will be performed directly by the factory’s QC department using calibrated instruments.Question 6: No spares and any tools for transformer are required. Please confirm Answer 6: Please refer to the RFQ condition and requirementQuestion 7: Training not included . Please confirm Answer 7: Please refer to the RFQ condition and requirementQuestion 8:  Updated Electrical drawings - Drawings CW 0 to CW20 - The project title mentioned ( Construction of station 2 in isthumas station in addition rehabilitation the electrical and mechanical components of the existing isthumas pumping) and is not for bir nasser. Answer 8: An amendment is to be published soon for the drawings- Electrical. Please refer to eSourcing, document tab. Amendment #2- Drawings Question 9: The transformer voltage is stated as 33/11 kV, indicating a single output, but the connection group designation (YNyn0d11) indicates a dual-output transformer. How should we proceed in this case? If the transformer is dual-output, what should the second output voltage be in kV?Answer 9: The TS explicitly confirms the requirement  of a 5MVA, 33/11 kV step-down power transformer featuring the YNyn0d11 vector group. Rather than treating this as a standard dual-output transformer feeding two distinct external loads, the document outlines specific compliance rules for how this configuration must be handled. The tertiary delta winding serves as  entirely for harmonic suppression , neutral stabilization, and fault-handling capability, it does not serve an external distribution load or auxiliary system voltage. Consequently, no secondary voltage rating is specified or required for it Question 10:  step-down transformer is requested, but the connection group belongs to a step-up transformer. How should we proceed in this case? Answer 10: The vector group YNyn0d11 specified for the 5MVA transformer is correct for this step-down application and aligns fully with the system requirements outlined in Section 2 of the Technical Specification.  Per clauses 2.1 and 2.2, both the 33kV transmission system and the 11kV distribution system are solidly earthed. To accommodate solid grounding on both sides, a star-star (YNyn) winding configuration is mandatory. The capital letters (YN) correctly designate the 33kV high-voltage primary winding , while the lowercase letters (yn0) designate the 11kV stepped-down secondary winding.  The d11 designation represents a tertiary delta winding included strictly for harmonic suppression and neutral stabilization, as required by clause 2.8 of the specification. It does not indicate a step-up configuration. Please  proceed as specified.

New amendment added #1: Amendment #1The purpose of the amendment is to:Extend the clarification deadline to 15 June, 2026Extend the tender's deadline to 22 June ,2026Amend the drawings link to add the amended docuement for ELECTRICAL WORKS DRAWINGS and replace it with the previous oneAmend the technical specification link to add the amended docuement for Metalclad T.S.- Final and replace it with the previous one. The clause "The country of origin for manufacturing & testing shall be in Europe, North America or Japan only." is deleted.Therefore, the follwoing amendment is in effect:Amend e-Sourcing genderal tab to extend clarificaion and tender's deadline  Amend  e-Sourcing document tab to add the update the links with the following documents ELECTRICAL WORKS DRAWINGS for drawingsTechnical specification - Metalclad T.S.- Final for technical specificationAll other terms and conditions remain the same

New clarification added: Question 1: Can we supply from a Chinese SWGR company that has been approved and supplied the PEC-Aden with Switchgear order?? or should the product manufacturing & testing should be in Europe ,North America or Japan as per the tender docs??? Please confirm.Answer 1: An amendment for the technical speciation- Metalclad T.S.- Final is to be published soon. We do not have any favorite origin, as much as it complies with the RFQ requirement.Question 2:  For 33kV and 11kV short circuit requirement, on BOQ is 31.5kA but TS shows 25kA. Please confirm which we shall followAnswer 2: As switchgear  combined from  different panels it was standardizing a system to handle both 25 kA for 3 seconds and 31.5 kA for 1 second. Please refer to the Metalclad Technical specification  page 2  section. A -   33 kV  SWITCHGEAR part  A-1  and Page 3 A2  it is matching the panels requirement in BoQ  in addition to the amended drawing SLD.Question 3: For 11kV part, TS B-5 section mentioned the 400A load breaker switch is required, but on BOQ, there is only 630A VCB panel requiredAnswer 3: Please refer to the Metalclad Technical specification  page 18  section  B-2   11 kV, (25kA/3sec)  item No b) One 630 A, VCB, circuit-breaker complete. And SLD as well Question 4: From TS SECTION –2 :  TECHNICAL SPECIFICATION – 11&33KV SWITCHGEAR – 2.0 MANUFACTURER/SUPPLIER. It mentioned the country of origin for manufacturing & testing shall be in Europe, North America or Japan only. Please confirm we can join in this tender. Answer 4:  An amendment for the technical speciation- Metalclad T.S.- Final is to be published soon. We do not have any favorite origin, as much as it complies with the RFQ requirement.Question 5: We kindly request an extension of the submission deadline for the tender by two (2) weeks. As the tender was announced immediately following the Eid holiday period, additional time is required to effectively communicate with suppliers and obtain the necessary quotations, technical information, and supporting documents required for a comprehensive and competitive submission. We would greatly appreciate your consideration of this request and look forward to your favorable response.Answer 5: An extension for the tender will be granted. Please check eSourcing  Question 6: Pls provide us with your clarification for the following :There is a mismatch between the single line diagram and the BOQ in terms of switchgear ratings and quantities.→ Could you please confirm which document we should consider as reference?If the single line diagram is to be followed, relay and current transformer details are missing in panels 1, 3, 5, and 6.→ Could you please advise how we should proceed for these panels?If the BOQ is to be considered, we kindly ask you to share a revised single line diagram aligned with the BOQ.Panels 4 and 6 are feeding generators:Is there any specific requirement for generator circuit breakers?Will current transformers and breaker be included in these panels?Is generator differential protection (87G) required?Could you also specify the voltage transformer requirements for the incoming panels?→ Will both incoming panels have identical specifications?Additionally, we would appreciate it if you could share the missing 33kV single line diagram,Answer 6: An amendment is to be published soon for the drawings- Electrical. Please refer to eSourcing, document tab. However , both should be matched ,this is  to confirm that the BoQ value is correct as well .Question 7: We kindly need your feedback on the following clarification1.     There is a discrepancy in the quantity of cabinet units between Single Line Drawing and the Bill of Quantities. Please confirm whether the SLD design or the BOQ design shall prevail.2.     Per the incoming and outgoing feeder layouts shown on drawings, PT cabinets are specified for all relevant bays. Conventionally, PT devices are installed either solely within the incoming feeder cabinet or in a standalone dedicated PT cabinet, and PT installation on outgoing feeders is unnecessary. Kindly confirm if PTs are required to be fitted on outgoing feeder cabinets strictly in accordance with the drawing specifications.- refer to attached.3.     With regard to Item 4.14 in the parameter sheet: Impulse withstand voltage: 75/95kV, please confirm the rated impulse withstand voltage as either 75 kV or 95 kV. If the specified level is 95 kV against the system maximum voltage of 13.8 kV (Item 4.10 Highest voltage in parameter sheet), type 24 kV switchgear shall be adopted for consideration.Answer 7:  An amendment is to be published soon for the drawings- Electrical. Please refer to eSourcing, document tab. However , both should be matched ,this is  to confirm that the BoQ value is correct as well .

New clarification added: Updated responses to the previously addressed questions:Pls provide us with ur response for the following Questions raised by manufacturers :Question 1:  In both image 1 and image 2, for the two 630VCB in red circle, we suspect they are wrong as they don’t match the BOQ. Please confirm what are exact values there.Answer 1:  An amendment is to be published soon for the drawings- Electrical. Please refer to eSourcing, document tab. However , both should be matched ,this is  to confirm that the BoQ value is correct as well .Question 3: Image 1, Image 2, and the BOQ all have some mismatches in configuration and details.For the purpose of quotation, shall we take the BOQ as the final configuration?Answer 3: An amendment is to be published soon for the drawings- Electrical. Please refer to eSourcing, document tab. However , both should be matched ,this is  to confirm that the BoQ value is correct as well . 

New clarification added: Pls provide us with ur response for the following Questions raised by manufacturers :Question 1: In both image 1 and image 2, for the two 630VCB in red circle, we suspect they are wrong as they don’t match the BOQ. Please confirm what are exact values there.Answer 1: Could you please specify the drawing number and page. However , both should be matched ,this is  to confirm that the BoQ value is correct as well .Question :. For 33KV-400A VCB in image 2, our team suspects it is indoor rather than outdoor.Answer 2: the  33KV-400A VCB indoor installation is specifically found in  Metalclad Technical specification , Section 1: General rating and minimum requirements, under item B-5 Quession 3: Image 1, Image 2, and the BOQ all have some mismatches in configuration and details.For the purpose of quotation, shall we take the BOQ as the final configuration?Answer 3: Could you please specify the drawing number and page. However , both should be matched ,this is  to confirm that the BoQ value is correct as wellQuestion 4:  Assuming the BOQ is the final configuration, we marked items in BOQ on SLD, with great details. Please check ‘Technical Confirmation.pdf’ and ‘BOQ.png’. The serial number in SLD follows the information in BOQ. Please also kindly provide the information based on the questions in the ‘Technical Confirmation.pdf’.Answer 4: This  part is between you and your manufacturer so we can confirm that you should adhere to the RFQ requirements.

New clarification added: Question 1: The tender technical specification link is not available in the document. Please provide the link or the technical specification sheet for the tender requirement. Answer 1: Thanks for notifying us. Please find the link to the technical specifications : https://drive.google.com/drive/folders/1aqDLhw8wB5ZszPlfpZaEysmgYceajMvm?usp=sharing