Replacement of dpi (dip proof inverters) with UPS systems for ESKOM kriel power station

The tender refers to required returnable documents, but the specific list and submission instructions are not provided in the extracted text.

The extracted text does not contain searchable compliance information; further AI extraction is recommended.

• PAYE Questionnaire pack is valid from 1 March 2023 to 28 February 2024 (document validity period).
• Tender‑specific closing date is 3 June 2026 (see tender record).

• Tax‑related queries: Eskom Group Tax Department, Megawatt Park (email [email protected]).
• Submission of the completed questionnaire: your Eskom contractor representative (address/email as provided by your representative).

• Complete the PAYE Questionnaire (signed summary sheet and all required affidavits).
• Submit the pack to your Eskom contractor representative.
• Copy Eskom Group Tax at [email protected] when returning the pack.
• Required affidavits vary by answer (e.g., Appendix 1, 2, 3, 4, 7 or 8).
• Failure to sign the applicable affidavit(s) will result in PAYE being withheld from your payments.

• The questionnaire classifies the contractor as Independent Contractor, Personal Service Provider (PSP), Labour Broker or Dependent Contractor.
• Classification is based on: 1) South African residence status, 2) employment of ≥3 full‑time staff, 3) involvement of connected persons, 4) income concentration (>80% from one client), 5) place‑control‑supervision test, 6) dominant‑impression test (payment linked to deliverables, risk for quality, right to subcontract, etc.).
• The outcome determines the tax code applied (e.g., 3601, 3616) and whether PAYE will be withheld.

• Provide truthful information on all questionnaire fields.
• Supply accurate company/CC/trust details: VAT, Income Tax, registration numbers, bank details, contact information.
• Sign all affidavits that apply to your answers (e.g., Appendix 1 for ≥3 employees, Appendix 2 for no connected persons, Appendix 3/4 for place‑control tests, Appendix 7 for PSP/Dependent Contractor status, Appendix 8 declaration).
• Non‑compliance (missing or unsigned affidavits) triggers PAYE withholding.

Dr. Titus Mathe (Chief Engineer: DC & Auxiliary Supplies). Additional contacts may include: Christo van Zyl (Battery Care Group Convenor), Thomas Jacobs (Chief Engineer: DC & Auxiliary Supplies), Kashveer Jagdaw (DC & Auxiliary Supplies SC Chairperson).

No submission portal, deadline, or formal bid return process is specified in the document. However, during project execution, the following must be submitted: 1) Completed commissioning checklists (Annexes A-N) for battery room, stands, cubicles, and batteries. 2) All commissioning documents or certificates must be forwarded to the Eskom-appointed DC person for approval. 3) Battery replacement record form (Annex N) must be completed for record-keeping.

Compliance will be evaluated against: 1) ISO 9001 Quality Management Systems. 2) Eskom standard 240-56227923 (Battery Quality Requirements). 3) All commissioning work must be approved by an Eskom-appointed DC person. 4) Non-compliance with storage, installation, or commissioning instructions may lead to disqualification, warranty cancellation, or reduced operational lifetime.

Scope: Replacement of existing DPI (Dip Proof Inverters) with UPS (Uninterruptible Power Supplies) for Kriel Power Station (6 units) over 2 years. Technical requirements include: 1) Storage: Nickel Cadmium (max 24 months, 0°C–30°C, no direct sunlight), Flooded Lead Acid (max 24 months, refreshing charge every 3 months), VRLA (max 24 months, refreshing charge every 3 months). 2) Installation: Battery cubicles/stands must be level, securely mounted, and earthed. Inter-cell connectors must be torque-tightened, colour-coded (red=positive, blue=negative, white=inter-row), and coated with petroleum jelly/no-oxide grease. 3) Commissioning: Calibrated measurement equipment (class 0.5% accuracy) required for voltage, current, temperature, specific gravity, and discharge tests. Mandatory checklists (Annexes A-N) must be completed. 4) Safety: PPE per Eskom standard 240-44175132, no naked flames in battery rooms, adequate ventilation, and insulated tools. 5) Discharge tests: Must meet OEM-specified capacity and voltage thresholds.

1. B-BBEE: Minimum Level 1. 2) Personnel: Must be fully accredited by Eskom and the local supplier. 3) Safety: Compliance with Eskom PPE standard 240-44175132 and safe handling/disposal of batteries/electrolyte (240-89797258). 4) Quality: Compliance with ISO 9001, IEC 1632-1:2005, SANS 10108:2014, SANS 10119:2011, and Eskom battery quality standards (240-56227923, 240-56356510, 240-56360034, 240-56360086). 5) Equipment: All measurement tools must have valid calibration traceable to National Standards. 6) Documentation: Battery replacement records (Annex N) and commissioning checklists (Annexes A-N) must be maintained.

Clarification meeting (non-compulsory): 14 May 2026 at 11:00 via Microsoft Teams. Clarification query deadline: 5 working days before tender closing. Tender closing date: 03 June 2026 at 10:00.

Eskom Representative: Lesiba Mokhonoana. Email: [email protected]. Tel: 017 615 2327.

Submit tenders electronically via the Eskom E-tendering site. No hard copies will be accepted. Ensure all documents are in PDF format (total size limit 4GB, individual file limit 500MB). Pricing schedules must be submitted in both PDF and Excel formats. Ensure submission status is marked as 'complete' before the deadline. Late tenders will not be accepted.

Evaluation follows an 80/20 preference point system. Stage 1: Functionality evaluation (100% total, 80% minimum threshold for qualification). Stage 2: Price (80 points) and Specific Goals (20 points).

Replacement of 6 existing Dip Proof Inverters (DPI) with control Uninterruptable Power Supplies (UPSs) at Kriel Power Station for a 2-year period.

Pricing must be inclusive of VAT and exclude contingencies. Unconditional discounts will be considered in evaluation; conditional discounts will be applied only at payment stage. Payment terms for contracts under R50 million are within 30 days of receipt of an undisputed invoice.

Mandatory returnables include SBD 1, SBD 4 (Bidders Disclosure), SBD 6.1 (Preference Points), SBD 6.2 (Local Content, if applicable), Authorisation Form, Acknowledgement Form, Tenderer’s particulars, and Integrity Declaration Form. Tenderers must not be restricted by National Treasury or Eskom and must not have a conflict of interest.

Scope: Replacement of existing Dip Proof Inverters (DPIs) with Uninterruptible Power Supplies (UPSs) for Kriel Power Station (6 units) over 2 years.

Key Technical Requirements:

• Follow Eskom’s standard installation and commissioning procedures for power electronics equipment (battery chargers, inverters, converters, UPS systems).
• Installation methods (Method 1–4) must be selected based on system configuration, load isolation, and safety. Methods include:
• New installations (no standby needed).
• Total system outage (no standby needed).
• One load isolated for restricted time (standby system required, matching or exceeding existing capacity).
• Load cannot be isolated (standby system required, must safely connect to live load).
• Mandatory pre-installation steps:
• Agree on installation method with all stakeholders, including detailed risk assessment.
• Project supervisor must submit a work schedule for approval by the asset owner/system engineer.
• Use manufacturer’s drawings for assembly, cabling, and bus wiring.
• Testing requirements:
• Insulation resistance testing (minimum 2MΩ) for all cables and equipment before connection.
• Factory Acceptance Testing (FAT) must be completed by the manufacturer, with Eskom reserving the right to witness tests. FAT results must accompany equipment on delivery.
• Cold commissioning (pre-energization checks) and hot commissioning (post-energization validation) as per check sheets (Annex A–E).
• Documentation and drawings required:
• Room layout, cable block diagrams/schedules, general arrangement and schematic drawings, operational manuals.
• Settings sheets must be approved by engineering/design and supplied prior to project commencement.
• Safety and compliance:
• All work must be performed under a Permit to Work.
• Adhere to Occupational Health and Safety Act and Eskom’s plant safety regulations (e.g., 36-681 for live work).
• Personal Protective Equipment (PPE) must be used as per risk assessments.
• Equipment standards:
• Equipment must meet Eskom Standard 240-53114248 for power electronics.
• Labelling must comply with Eskom’s drawing standards (e.g., AKZ/KKS numbers, fuse/MCB ratings, switchgear positions).
• Commissioning deliverables:
• Completed check sheets (Annex A–E) for each equipment type, signed off and stored per division processes.
• Verification of alarms, surge protection, earthing, and component integrity.

Mandatory Compliance:

• Eskom Standard 240-53114248: Thyristor and Switch Mode Chargers, AC/DC to DC/AC Converters, and Inverter/UPS Standard.
• ISO 9001: Quality Management Systems (manufacturer’s quality control plan must be signed off by Eskom).
• Eskom Engineering Drawing Standard 240-86973501: Common Requirements for drawings and documentation.
• Occupational Health and Safety Act: Adherence to all stipulations, including PPE and safe work procedures.
• Eskom Plant Safety Regulations (e.g., 36-681 for live work where applicable).
• Local station safety regulations: Must be followed in addition to national/standard requirements.

Documentation and Certification:

• Manufacturer’s procedures and manuals must be provided and used for installation/commissioning.
• All test results (FAT, insulation resistance, commissioning) must be documented and submitted.
• Equipment must be accompanied by approved settings sheets and marked-up drawings (if modifications are made).

Ethics Office advice line: +27 11 800 3187/3189. Email: [email protected]. Fax: 086 663 4120. Whistle-blowing hotline: 0800 11 27 22.

Suppliers must adhere to Eskom’s Code of Ethics, including: fair, equitable, transparent, competitive, and cost-effective procurement practices; high ethical standards in business dealings; no favouritism or nepotism; compliance with safety, health, and environmental legislation; and protection of confidential information. Suppliers must also comply with Eskom’s Conflict of Interest Policy, Protected Disclosures Policy, and relevant South African legislation (e.g., Labour Relations Act, Employment Equity Act, Basic Conditions of Employment Act).

Open tender process. Bidders must specialize in the major scope (control supply UPSs) and will be responsible for appointing subcontractors for: cabling, batteries, civil/structural work, and SCADA modifications. Lead contractor must meet criteria outlined in the tender evaluation strategy (to be developed).

Contract awarded to a lead contractor specializing in the major scope (control supply UPSs). Bidders must meet the criteria set out in the tender evaluation strategy (to be developed).

Scope: Decommission existing Dip Proofing Inverters (DPIs) and supply, install, FAT, SAT, commission, and handover control supply modular UPSs at Kriel Power Station for 380V Unit Boards A-D. Key technical requirements: (n+1) modular redundancy for rectifiers and inverters; hot-swappable modules; NiCd battery backup; bypass line for continuous supply; sustain control supply voltage for 1 second during voltage dips (0.75 Vn); interface with existing 380V Unit Boards A-D; mains recorder for voltage monitoring; alarm integration with EOD SCADA. Structural: Floor slab assessment required for UPS and battery cabinet placement (existing slab may not support load without reinforcement). Equipment ratings: UPSs to match existing DPI ratings (5.75kVA). Standards: Must comply with Eskom and SANS electrical, structural, and safety standards.

Contract type: NEC3. Estimated capital cost: R23.2M. Pricing format and payment terms to be specified in the tender evaluation strategy.

Mandatory compliance with Eskom standards: 240-56227443 (Control and Power Cables), 240-56360086 (Stationary Vented Nickel Cadmium Batteries), 240-137465740 (Standby Battery Storage and Commissioning), 240-53114248 (Thyristor and Switch Mode Chargers/UPS), 240-56356396 (Earthing and Lightning Protection), 240-56364545 (Structural Design), 240-83539994 (NDT Personnel Approval), 240-83540088 (NDT Requirements). Additional compliance: SANS 10142-1 (Low-voltage installations), SANS 10162-1 (Structural use of steel), SANS 10160-1 (Basis of structural design), SANS 10100-1 (Structural use of concrete).

Submit the following with your bid: 1) OEM letter of certification/accreditation (must include distribution agreement, technical support offered, and warranties); 2) Full equipment track record (years in service, customer references with contact details, environmental conditions, known problems/exceptional performance); 3) Completed Technical Schedules A and B; 4) Certificates proving compliance with environmentally sound disposal of used cells and electrolyte; 5) If deviating from Eskom standards: commissioning and maintenance instructions with differences clearly indicated; 6) Training proposal (course structure, duration, price per course for max 15 people, including venue, equipment, and presenters); 7) Priced spares list (individual pricing, descriptions, reference numbers, 5-year storage guarantee).

Evaluation is based on: 1) Compliance with SANS 62259:2005 or IEC 62259:2003 for recombination technology; 2) Meeting electrical performance (rated capacity, discharge curves, endurance, charge retention, temperature effects); 3) Quality assurance (ISO 9001 certification); 4) Local support capability (24-hour response during commissioning, trained staff nationally); 5) Prototype inspection and testing by Eskom; 6) Verification of test certificates, drawings, and instruction manuals; 7) Warranty terms (1-year full + 4-year prorated).

Scope: Manufacture, delivery to site, off-loading, erection, commissioning, and de-commissioning of vented nickel cadmium cells (1.2V nominal) with partial gas recombination for Kriel Power Station. Key requirements: 1) Cells must be wet, charged, and pre-tested (capacity test reports per cell required); 2) Expected life: 17 years with end-of-life capacity ≥80% of C5 (5-hour rated capacity); 3) Must include all inter-cell connectors, nuts, bolts, washers, anti-corrosion lubricant, and cell numbering; 4) Battery cabinets: IP31 rating, ventilation holes, no internal isolation points, sharp edges removed (top drawer or standalone types); 5) Environmental suitability: altitude ≤2200m, humidity 10-85% non-condensing, outdoor temps -10°C to +40°C, room temps -5°C to +50°C; 6) Must provide maintenance equipment (jug, funnel, top-up bottle, lubricant), safety signs, and logbooks (A4, specific covers, NCR paper); 7) Spares: 85-170 cells stocked locally, 24-hour delivery, 10-year availability; 8) Disposal: Environmentally sound processes for cells and electrolyte, with compliance certificates; 9) Training: Optional (if specified), covering installation, commissioning, and maintenance; 10) Warranty: 1-year full + 4-year prorated (proportional to achieved life vs. design life).

1. Cells must comply with SANS 62259:2005 or IEC 62259:2003 (recombination technology); 2) Transport must comply with National Road Traffic Act 93/1996 (hazardous goods); 3) Hazardous locations: comply with SANS 10108 (classification) and SANS 10119 (ventilation/pressurization); 4) Quality: ISO 9001 certification; 5) Warranty: Minimum 1-year full + 4-year prorated (manufacturer-endorsed, not representative); 6) Codification: Adhere to Eskom’s AKZ/KKS system for all plant/components; 7) Disposal: Comply with 240-89797258 (safe handling/transport/disposal of cells, batteries, electrolyte).

Submit all tender information in English. Use the provided electronic MS Excel spreadsheets for Technical Schedules A&B. All supporting documents, including drawings, must be submitted in electronic (e.g., PDF) format. Clearly reference all supporting documents in the relevant columns of the Technical Schedules. Non-compliance with submission format may result in disqualification.

Technical evaluation follows a two-level process with an 80% minimum threshold for acceptability. Level 1: Mandatory Gatekeepers (must pass all to proceed; failure results in 0% technical score). Level 2: Scored evaluation (100% total) with three sub-categories: 1) Product A&B Schedules (50% weight) – scored per item (5 = fully compliant, 2 = partially compliant, 0 = non-compliant), multiplied by item weight. 2) Supplier support, facilities & services (20% weight) – assessed via site visit to OEM/local agent. 3) Risk (30% weight) – split into Product Risk (60% of sub-category, scored 100%, 80%, 40%, or 0%) and Performance Questions (40% of sub-category, covering track record, expertise, and OEM support).

Scope: Technical evaluation, testing, and acceptance of Flooded Lead Acid and Nickel Cadmium standby batteries, accessories, and ancillary equipment for Eskom. Standards: Must comply with ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and Eskom-specific standards (240-56360034 for Vented Lead Acid Batteries, 240-56360086 for Nickel Cadmium Cells). Local Content: All battery cabinets and stands must be locally manufactured. Additional: Only single-cell batteries (not blocks) will be accepted. Suppliers must demonstrate capabilities for design, manufacture, testing, delivery, installation, commissioning, de-commissioning, and disposal.

Pricing must cover: supply, transportation, de-commissioning, disposal, formation, installation, and commissioning of batteries. Clarify whether guarantees and/or warranties are included in the offered price. Subcontracting (if any) must be disclosed and evaluated as part of the supplier’s facilities assessment.

Mandatory: 1) All tender information in English on provided MS Excel Technical Schedules A&B. 2) All supporting documentation (certificates, type tests, ISO certifications, drawings) must be available. 3) Formal OEM-agent agreement detailing distribution, technical support, and warranties for this tender. 4) Detailed track records (companies, contact details, sites) for all offered equipment. 5) Permanent South African office for supply and support, with advanced-level support available for the contract duration. 6) Local manufacture of battery cabinets and stands. 7) Valid certificates for hazardous substance transport (vehicle and Hazmat agreement). Unacceptable risks: No local/regional track record, non-compliance with type tests, missing OEM support/agent agreement, use of non-Eskom-approved subcontractors, or lack of technical support facilities for commissioning.

• Period for reply to the offer: 1 week (as stated in the contract).
• Starting date: as soon as possible after contract award.
• First programme submission: within 2 weeks of contract signature.
• Revised programmes: at intervals not exceeding 2 weeks.
• Completion date for the whole works: not specified (placeholder in document).

Project Manager: Kgomotso Ngweye – Tel: 017 615 2450 – Email: [email protected] – Address: Kriel Power Station, Private Bag x5009, Kriel, 2271. Supervisor: Ted Magwaza – Tel: 017 615 2972 – Email: [email protected] – Address: Kriel Power Station, Private Bag x5009, Kriel, 2271.

• Complete the NEC3 Form of Offer and Acceptance (C1.1) and have it signed by an authorised representative.
• Submit all returnable documents listed in the Tender Data at the award stage.
• Within two weeks of receiving the signed agreement, deliver all required securities, bonds, guarantees and proof of insurance to the Employer’s agent as specified in the Contract Data.
• Failure to provide the securities within this period will be treated as repudiation and may lead to disqualification.

• Replace existing DPI (dip‑proof inverters) with UPS units at Kriel Power Station Units 1‑6 (specifically Units 3‑6 mentioned).
• Scope includes engineering, design, manufacturing, factory acceptance testing, transport, off‑loading, installation, site acceptance testing, commissioning and hand‑over.
• Works cover structural integrity checks, UPS space allocation, SCADA modifications for alarm integration, and provision of training to Eskom engineering, maintenance and operations staff.
• Contractor must supply associated power and control cabling and deliver required software/firmware.
• All works must comply with NEC3 ECC3 contract conditions and relevant South African standards.

• Contract type: NEC3 Option A – priced contract with activity schedule.
• Payment terms: invoices paid within 4 weeks of receipt of a valid invoice.
• Retention: 10% of contract price (retention amount is zero, but 10% is held).
• Price adjustment for inflation (Option X1) based on SEIFSA indices – 35% Labour, 10% Transport, 45% Electrical Engineering, 15% non‑adjustable.
• Delay damages (Option X7): 2% of the price of the delayed item per day, capped at 10% of that item’s price.
• No explicit requirement for performance or bid bonds in the extracted text.

• Contractor must comply with NEC3 ECC3 contract conditions.
• Provide CIDB registration number where applicable.
• Notify Employer within 7 days of any change to B‑BBEE status and submit an updated verification certificate within 30 days.
• Maintain required insurances as per Insurance Table A (cover for loss/damage to works, plant, equipment, property and bodily injury).
• Provide CSD, tax compliance and valid CIPC registration as per standard public‑sector tender requirements (implied but not explicitly listed).

Closing date: 2026-06-03 at 10:00. Document compilation/authorization dates (2022-06-01 to 2022-06-06) are historical and not bid-relevant.

Submit all information in English. Provide an OEM letter confirming you are a local agent authorized to: test, commission, maintain, modify, and conduct operating/maintenance training. Submit completed Technical Schedules A&B separately for each offered product (e.g., UPS, chargers, inverters). Include compliance to Referenced Technical Standards (Annex D) with a signed declaration for any deviations. Submit CVs for key personnel involved in development. Failure to meet any mandatory requirement results in automatic disqualification.

Evaluation has four stages, each with an 80% minimum threshold to proceed: 1) Mandatory Requirements (pass/fail on submission completeness). 2) Technical Qualitative Requirements (scored sub-categories: Schedules A&B, OEM type testing, manuals/drawings/training, life cycle costing, deemed technical risk, practical evaluation). 3) Factory Evaluation (desktop + site visit, scored via checklist). 4) Deemed Offer Risk (narrative on technical, field failure, pricing, deviations, CVs). Scoring: Fully compliant = 3, Partially compliant = 1, Non-compliant = 0. Critical items weighted 2x or 3x. Claims of compliance are verified; unclaimed compliance is scored as non-compliant.

Scope: Design, manufacture, testing, QA, delivery, off-loading, erection, commissioning, decommissioning, installation, and disposal of UPS, phase-controlled/switch-mode chargers, converters, inverters, and Siemens charger retrofits for Eskom’s Generation/Transmission/Distribution. Standards: Eskom 240-53114248 (power electronics) and 240-87040106 (Siemens retrofit). Type testing: SANS 62040-1/2/3, SANS 1652, IEC 60146. OEM/agent must perform FATs and type tests (EMC/RFI via accredited lab). Manuals: Comprehensive OEM manuals required; similar equipment manuals acceptable with compliance commitment. Training: SETA-accredited, 10-year availability, OEM-authorized, includes parameter adjustments/firmware upgrades. Equipment must support local capacity for type testing >16A.

Life Cycle Costing (LCC) is evaluated as part of technical criteria. LCC includes: Total Cost of Ownership (capital cost + energy cost + reliability cost), Mean Time Between Failure (MTBF) data, spares/repair costs, and field failure reports. Pricing anomalies may impact Deemed Offer Risk Evaluation. Submit detailed cost breakdowns for LCC calculations.

Mandatory: All submissions in English; OEM-authorized local agent status; completed Technical Schedules A&B; signed compliance declaration for standards (with deviations); CVs for key personnel. Normative references: ISO 9001, Eskom standards 240-53114248 and 240-87040106. No explicit mention of CSD, tax, B-BBEE, CIDB, CIPC, professional registrations, or local content in the provided document.

Next review date for the standard: June 2026.

Compiled by: Yuvir Gokul (Senior Engineer, Transmission). Approved by: Prince Moyo (General Manager: Engineering). Authorized by: Dr. Titus Mathe (General Manager: Technology).

Evaluation is based on compliance with Eskom Standard 240-53114248 (Revision 3). Key points:

• Design, testing, quality assurance, and commissioning must align with the standard.
• Performance is verified against Equipment A&B Schedules (Annexures A–E) and relevant SANS/IEC standards (e.g., SANS 1652, IEC 60146-1-1, IEC 62040).
• Technical specifications, operational requirements, and test results are assessed for conformity.

Scope: Replacement of existing dip-proof inverters with control UPS for Kriel Power Station (6 units, 2-year period).

Key requirements:

• Full compliance with Eskom Standard 240-53114248 (Revision 3).
• Environmental suitability: Altitude ≤2,000m; humidity 20–90% (non-condensing); outdoor temps -15°C to 60°C; indoor temps -5°C to 50°C.
• Input supply: TN-S configuration; 400V (3-phase) ±15–25% or 230V (1-phase) ±15–25% (division-dependent). Frequency: 50Hz ±5%.
• UPS classification: VFI-SS-111 (IEC 62040-3).
• Operational features: Hot-pluggable rectifier modules; active power factor correction; redundant configurations; microprocessor-based control for alarms, voltage/current monitoring, and event recording (5-second window).
• Battery compatibility: Vented Lead Acid (240-56360034), NiCd (240-56360086), VRLA (240-51999453), Lithium Iron Phosphate (240-170000103).
• Mechanical: IP2X rating for live circuitry; maintenance without load interruption.
• Performance: Output voltage tolerance ±0.5% (float) or ±1% (other modes) under ±10–15% input variation; ±1–2% under ±25% input variation.

Mandatory compliance with:

• Eskom Standard 240-53114248 (Revision 3).
• SANS 1652 (Battery Chargers – Industrial Type).
• IEC 60146-1-1 (Semiconductor convertors).
• IEC 62040 (UPS systems).
• SANS 10142-1 (Wiring code).
• IEC 61000 series (EMC standards).
• Battery standards: 240-56360034 (Vented Lead Acid), 240-56360086 (NiCd), 240-51999453 (VRLA), 240-170000103 (Lithium Iron Phosphate).

Eskom Holdings SOC Ltd, Kriel Power Station, Bethal-Ogies Road, Kriel, Mpumalanga, 2271. Postal: Private Bag X5009, Kriel, 2271. Phone: +27 17 615 2653. Contact Person: A Botha.

Scope: Replacement of existing DPI (dip proof inverters) with control uninterruptable power supplies (UPSs) for Kriel Power Station. Quantity: 6 units. Duration: 2 years.

FAT notice periods: At least 2 months' notice required if testing is in South Africa. At least 4 months' notice required if testing is outside South Africa.

Evaluation includes: Factory Acceptance Test (FAT) must be conducted by the Contractor at a properly equipped facility in South Africa. System functionality must be demonstrated to the Project Manager/Supervisor. Non-critical defects must be rectified before commissioning.

Scope of work: Decommission and remove existing DPIs (Dip Proof Inverters) and associated feeder circuits. Design, manufacture, supply, install, test, and commission 5kVA control supply UPS units (125% overload capacity for 10 minutes) for 6 units at Kriel Power Station. Supply and install Nicad batteries with 30-minute standby time, hydrogen recombination technology, and compliance with 240-56360086 (Stationary Vented Nickel Cadmium Battery Standard). Design and install earthing/bonding systems per 240-56356396 standard. Modify SCADA for alarming and interface with existing systems. Provide training to Eskom staff, handover software/firmware, and update documentation (e.g., as-built drawings, cable schedules). Compliance with Eskom standards: 240-53114248 (UPS), 240-5622744 (cabling), and 240-56176097 (cable schedule template).

Payment terms: Based on payment certificates issued by the Project Manager. Contractor must submit tax invoices to Eskom Holdings SOC Ltd matching the certified amount. Bonds and guarantees may be required as per contract terms.

Mandatory compliance: B-BBEE and preferencing schemes as per tender returnables. ASGI-SA (Accelerated Shared Growth Initiative – South Africa) obligations where applicable. Adherence to Eskom site entry, security, and health and safety regulations. Contractor must appoint a Principal Contractor if required under Construction Regulations 2003. All designs must be signed off by an ECSA-registered engineer. Structural assessments and designs must comply with governing standards.

Submit all required tender returnable documentation at the time of tender enquiry submission. This includes: - Valid product type test reports for all cables offered, in accordance with the relevant SANS standards. - SANAS accredited product certification body mark scheme documentation, where applicable.

Evaluation will include: - Compliance with ISO 9001 Quality Management Systems. - Verification of valid product type tests for all cables offered, as per SANS standards (e.g., SANS 97, 1339, 1507, 1574).

Scope: Replacement of existing dip proof inverters (DPI) with control uninterruptable power supplies (UPS) at Kriel Power Station for 6 units over 2 years.

Cable Requirements: - Must adhere to Eskom standard 240-56227443 for power and control cables. - Cable types: Medium Voltage (MV) XLPE, Low Voltage (LV) power cables, control/protection/instrumentation cables (e.g., BVXnnCM, BVSnnCM, UVGnnACM multicore). - Voltage ratings: MV (3.3kV to 22kV), LV (600/1000V), instrumentation (300/500V). - Conductors: Copper or aluminium (Class 2 per SANS 1411-1), with options for CCA or aluminium alloy for pilot projects. - Insulation: XLPE for MV, PVC for LV, flame-retardant and reduced halogen emission properties required. - Armouring: Galvanized steel wire or aluminium wire, as specified in schedules. - Colour coding: Per SANS 1507-3 (2020) for LV, and specific schemes for instrumentation cables.

Installation: - Must comply with SANS 10198-1 to 13, SANS 10142-1, and Occupational Health and Safety Act. - Cable racking: Horizontal support every 375mm, vertical every 750mm. Trefoil configurations require non-magnetic cleats tested to SANS 61914. - Terminations: Use SANS 1213 mechanical glands. Torque wrenches mandatory; values per standard tables. - Fire performance: Low halogen emission (blue stripe) for tunnels/buildings, flame retardant (red stripe) for buried cables. - Testing: Type tests, sample tests, and routine tests required per SANS standards.

Documentation: - Cable dimensional data and rating information must be provided. - Marking: Outer sheath must include voltage level, cross-sectional area, and trade mark.

1. ISO 9001 Quality Management Systems certification. 2. Compliance with Occupational Health and Safety Act and all amendments. 3. All cables must carry valid product type tests per relevant SANS standards (e.g., SANS 97, 1339, 1507, 1574, 1411). 4. SANAS accredited product certification body mark scheme compliance where applicable. 5. Adherence to Eskom Generation Plant Safety Regulations and other normative references listed in the standard.