# The design, detailed engineering, manufacture, testing at works, supply, shipping, transportation, delivery, installation, erection, site-testing and commissioning of class 1 power transformers on an “as and when” required basis over a five (5) year period for Distribution Division.

> This tender closed on 2026-10-28.

- **Reference:** E3324DXECOU
- **Issuer:** [Eskom - Distribution](https://za.bidwunder.com/tenders/issuer/eskom-distribution.md)
- **Region:** National
- **Type:** Expression of interest
- **Published:** 2026-08-05
- **Closing date:** 2026-10-28 10:00 SAST
- **Sectors:** [Electrical equipment](https://za.bidwunder.com/tenders/sector/C27.md), [Electricity and gas](https://za.bidwunder.com/tenders/sector/D35.md), [Other professional services](https://za.bidwunder.com/tenders/sector/M74.md)

## Summary

#### Overview
**Procurement of design, detailed engineering, manufacture, testing at works, shipping, delivery, installation, erection, site-testing and commissioning of class 1 power transformers on an “as and when” required basis over five years for Eskom Distribution.** The EO I scope covers transformer design-to-commissioning across multiple sites per Eskom 240-68973110 specifications, with corrosion protection per Eskom 240-56030674 and a heavy-pollution operating context.

#### Requirements
- Proven capability to design, detail-engineer, manufacture, test, supply, install, erect and commission class 1 transformers up to the specified MVA range (as per Eskom 240-68973110).
- Compliance with Eskom corrosion protection and environmental requirements (240-56030674; Very Heavy pollution level as applicable).
- Ability to perform the full spectrum of site-based activities (delivery, off-loading, erection and site-testing/commissioning) over a five-year framework.
- Adherence to testing regimes outlined in purchaser schedules (Schedule A/B) including temperature rise, various impulse tests, capacitance/insulation tests, partial discharge and related assessments.
- Completion of the Vendor Questionnaire Annexure G as part of pre-qualification documents (see Annexure G, 16. Vendor Questionnaire_Transformers_Annexure G_1.pdf).
- Submission in response to Eskom’s Expression of Interest by the stated deadline (2026-10-28 08:00); consult tender documents for submission method and required forms.
- Refer to attached scope of work for full requirements (Environmental Requirements_Dx Class 1 Power Transformers.docx) and transformer standards/specifications (Power Transformer Standard, 1.25 MVA and above, 2.2 kV max). 

#### How to Apply
- Deadline: 2026-10-28 08:00 (final). 
- Submission details and method: not specified here; refer to Eskom’s tender documentation portal and the EOI package for exact submission process. 
- Documents to submit: completed Vendor Questionnaire Annexure G (16. Vendor Questionnaire_Transformers_Annexure G_1.pdf); any other Schedule A/B documentation and standard specifications (e.g., 240-68973110 Power Transformer Standard; 240-56030674). 
- Pre-qualifications/registrations: follow the standard Eskom pre-qualification path as outlined in the attached environmental tender evaluation and supplier documents; see Environmental Requirements_Dx Class 1 Power Transformers.docx for scope and evaluation criteria. 
- Briefing/session details: not listed in the provided materials.
- Where to obtain bid documents: via the Eskom e-tenders portal and the attached specification/vendor documents (e.g., 1. Environmental Requirements_Dx Class 1 Power Transformers.docx, 16. Vendor Questionnaire_Transformers_Annexure G_1.pdf).

## Description

The design, detailed engineering, manufacture, testing at works, supply, shipping, transportation, delivery, installation, erection, site-testing and commissioning of class 1 power transformers on an “as and when” required basis over a five (5) year period for Distribution Division.

The design, detailed engineering, manufacture, testing at works, supply, shipping, transportation, delivery, installation, erection, site-testing and commissioning of class 1 power transformers on an “as and when” required basis over a five (5) year period for Distribution Divisioin.

Tender Office Location: Cape Coastal Cluster: Brackenfell Western Cape, Block C.

## Documents

- Tender documents (194 files).zip
- 5\. E-Tenderers E-Tendering Training Acknowledgement Form (1).docx..docx
- 3\. 240-109253302 \_ Quality Control Plan or Inspection Test Plan (QCP or ITP) rev 2.docx..docx
- 1\. Invitation to Tender (ITT)\_Class 1 Power Transformers.docx..docx
- 7\. NEC3 ECC PreQual Class1 Power Trfr 5yr.docx..docx
- 1\. Environmental Requirements\_Dx Class 1 Power Transformers.docx..docx
- 4.240-109253698 CQP Template.docx..docx
- 6\. E-tendering Help Manual for supplier.docx..docx
- 3\. Non-Disclosure Agreement (NDA) Vendors.docx..docx
- 1\. SDLI Strategy Doc\_ BIDDERS TEMPLATE \_Class 1 Power Transformers.docx..docx
- 1\. ST\_240-68973110 Rev 3 Power Transformer Standard Specification.pdf..pdf
- 7\. 240-56063908 OIl and gas actuated relays (buchholz).pdf..pdf
- 1\. 240-105658000 Supplier Quality Management Specification (3).pdf..pdf
- 13\. ST\_240-56356191 Rev 3 TRANSFORMER AND REACTOR OIL LEVEL INDICATORS SPECIFICATION.pdf..pdf
- 1\. SDLI Strategy Doc\_ BIDDERS TEMPLATE \_Class 1 Power Transformers.pdf..pdf
- 14\. \_240-56062799\_Bushings Technical Specification\_Rev 4.pdf..pdf
- 8\. ST\_240-56062529 Rev 3 PASSIVE DEHYDRATING BREATHERS FITTED TO TRANSFORMERS,.pdf..pdf
- 4\. OHS Tender Evaluation Requirements \_Transformers 2025.pdf..pdf
- 3\. Baseline Risk Assessmnet\_2025 (002).pdf..pdf
- 4\. Supplier Declaration of Interest.pdf..pdf
- 5\. 20260622\_ Form A Cat1 \_DX\_Class 1 TRFR.pdf..pdf
- 5\. 240-56063867 Transformer and Reactor Rapid Pressure Rise Relay.pdf..pdf
- 4.240-109253698 CQP Template.pdf..pdf
- 1\. 32-726-03T High Risk OHS Specification\_.pdf..pdf
- 15\. 240-171000616\_Technical Evaluation Criteria for Dx trfrs final.pdf..pdf
- 8\. Dx Works information for Installation Units.pdf..pdf
- 3\. Annexure G3.pdf..pdf
- 6\. 240-56063871 Pressure relief devices.pdf..pdf
- 4\. Annexure G4.pdf..pdf
- 9\. 240-56356202 Bag leak detector.pdf..pdf
- 6\. E-tendering Help Manual for supplier.pdf..pdf
- 11\. 240-75661431 Rev 3 \_STANDARD FOR MINERAL INSULATING OILS.pdf..pdf
- 4\. 240-56063843 Analogue oil and winding temperature indicators.pdf..pdf
- 3\. 240-56062720 Oil sampling points labels.pdf..pdf
- 17\. Vendor Questionnaire\_Transformers\_Annexure G\_ 2.pdf..pdf
- 6\. TEAP\_ST\_240\_170001064.pdf..pdf
- 12\. Passive Dehydrating Breathers 240-56062529.pdf..pdf
- 2\. Annexure M - Annexure B\_ Acknowledgement Form.pdf..pdf
- 2\. 240-56030674 Rev 2 paint spec\_Signed.pdf..pdf
- 1\. Invitation to Tender (ITT)\_Class 1 Power Transformers.pdf..pdf
- 2\. 20260624\_Cat1- Quality Req \_DX \_ Class 1 TRFR.pdf..pdf
- 2\. Eskom\_Standard\_Conditions\_of\_Tender.pdf..pdf
- 9\. Dx works information for Storage Units.pdf..pdf
- 18.Vendor Questionnaire\_Transformers\_Annexure G\_ 3.pdf..pdf
- 1\. Environmental Requirements\_Dx Class 1 Power Transformers.pdf..pdf
- 2\. Annexure G2.pdf..pdf
- 16\. Vendor Questionnaire\_Transformers\_Annexure G\_ 1.pdf..pdf
- 10\. 240-56535946 Transformer and reactor cooling fans.pdf..pdf
- 69 - 20MVA 88-44kV (YNd1)(2025).xlsx..xlsx
- 14\_2.5MVA, 44-6.6kV YNd1.xlsx..xlsx
- 112 - 160MVA 132-88-22kV (YNa0d1)(2026).xlsx..xlsx
- 107 - 80MVA 132-88-22kV (YNa0d1)(2026).xlsx..xlsx
- 47\_10MVA 88-22kV YNd1.xlsx..xlsx
- 31\_5MVA 66-3.3kV YNd1.xlsx..xlsx
- 94 - 40MVA 132-66-22kV (YNa0d1)(2025)).xlsx..xlsx
- 8\_2.5MVA, 22-3.3kV Dyn11.xlsx..xlsx
- 19\_5MVA 33-11kV YNyn0.xlsx..xlsx
- 29\_5MVA 22-2\_2kV YNyn0.xlsx..xlsx
- 83 - 20MVA 132-33kV (YNd1)(2025)2.xlsx..xlsx
- 33\_5MVA 88-11kV YNd1.xlsx..xlsx
- 48\_10MVA 88-3.3kV YNd1.xlsx..xlsx
- 96 - 40MVA 66-11kV (YNyn0)(2025).xlsx..xlsx
- 102 - 80MVA 132-44-11kV (YNa0d1) (2026).xlsx..xlsx
- 73 - 20MVA 132-11kV (YNd1)(2025).xlsx..xlsx
- 23\_5MVA 44-3.3kV YNd1.xlsx..xlsx
- 104 - 80MVA 88-44-22kV (YNa0d1)(2026).xlsx..xlsx
- 67 - 20MVA 88-22kV (YNd1)(2025).xlsx..xlsx
- 32\_5MVA 88-3.3kV YNd1.xlsx..xlsx
- 58 - 10MVA 66-3.3kV (YNd1)(2025-Yn).xlsx..xlsx
- 3\_1.25MVA, 22-2.2kV DYN11.xlsx..xlsx
- 59 - 10MVA 22-3.3kV (YNyn0)(2025-Yn).xlsx..xlsx
- 24\_5MVA 44-6.6kV YNd1.xlsx..xlsx
- 12\_2.5MVA, 88-2.2kV YNd1.xlsx..xlsx
- 60 - 20MVA 33-11kV (YNyn0)(2025).xlsx..xlsx
- 66 - 20MVA 88-11kV (YNd1)(2025).xlsx..xlsx
- 98 - 40MVA 66-11kV (YNd1)(2025).xlsx..xlsx
- 110 - 90MVA 132-44kV (YNd1)(2026).xlsx..xlsx
- 99 - 40MVA 88-6\_6kV (YNd1)(2025).xlsx..xlsx
- 10\_2.5MVA, 33-22kV YNyn0.xlsx..xlsx
- 4\_1.25MVA, 22-6.6kV, YNyn0.xlsx..xlsx
- 37\_10MVA 33-11kV YNyn0.xlsx..xlsx
- 109 - 80MVA 132-44kV (YNd1)(2026).xlsx..xlsx
- 15\_2.5MVA, 66-3.3kV YNzn11.xlsx..xlsx
- 86 - 40MVA 88-11kV (YNd1)(2025)(High Z).xlsx..xlsx
- 38\_10MVA 33-22kV YNyn0.xlsx..xlsx
- 54 - 10MVA 22-6\_6kV (YNyn0)(2025).xlsx..xlsx
- 52\_10MVA 132-22kV YNd1.xlsx..xlsx
- 64 - 20MVA 66-22kV (YNd1)(2025-Yn)(High Z).xlsx..xlsx
- 51\_10MVA 132-11kV YNd1.xlsx..xlsx
- 41\_10MVA 44-22kV YNd1.xlsx..xlsx
- 28\_5MVA 88-22kV YNd1.xlsx..xlsx
- 9\_2.5MVA, 22-6.6kV Yd9.xlsx..xlsx
- 113 - 160MVA 132-33kV (YNd1)(2026).xlsx..xlsx
- 27\_5MVA 88-6\_6kV YNd1.xlsx..xlsx
- 20\_5MVA 33-22kV YNyn0.xlsx..xlsx
- 6\_2.5MVA, 22-11kV YNyn0.xlsx..xlsx
- 43\_10MVA 66-6.6kV YNd1.xlsx..xlsx
- 5\_2.5MVA, 22-11kV DYN11.xlsx..xlsx
- 91 - 40MVA 132-11kV (YNd1)(2025).xlsx..xlsx
- 77 - 20MVA 132-6.6kV (YNd1)(2025)2.xlsx..xlsx
- 11\_2.5MVA, 44-2.2kV Yd9.xlsx..xlsx
- 97 - 40MVA 66-11kV (YNd1)(2025-Yn)(Hi).xlsx..xlsx
- 39\_10MVA 33-6.6kV YNyn0.xlsx..xlsx
- 21\_5MVA 44-11kV YNd1.xlsx..xlsx
- 105 - 80MVA 132-44-22kV (YNa0d1)(2026).xlsx..xlsx
- 74 - 20MVA 132-22kV (YNd1)(2025).xlsx..xlsx
- 40\_10MVA 44-11kV YNd1.xlsx..xlsx
- 18\_5MVA 22-6.6kV YNyn0.xlsx..xlsx
- 1\_1.25MVA, 22-11kV YNyn0.xlsx..xlsx
- 72 - 20MVA 88-44-22kV (YNa0d1)(2025)).xlsx..xlsx
- 36\_10MVA 22-11kV YNyn0.xlsx..xlsx
- 101 - 45MVA 132-22kV (YNd1)(2026).xlsx..xlsx
- 68 - 20MVA 88-33kV (YNd1)(2025).xlsx..xlsx
- 62 - 20MVA 44-11kV (YNd1)(2025).xlsx..xlsx
- 57 - 10MVA 66-33kV (YNd1)(2025-Yn).xlsx..xlsx
- 34\_5MVA 66-3.3kV YNd1.xlsx..xlsx
- 70 - 20MVA 88-6\_6kV (YNd1)(2025).xlsx..xlsx
- 79 - 20MVA 132-66-22kV (YNa0d1).xlsx..xlsx
- 2\_1.25MVA, 22-11kV Dyn11.xlsx..xlsx
- 100 - 40MVA 132-44-22kV (YNa0d1)(2025)).xlsx..xlsx
- 76 - 20MVA 132-6.6kV (YNd1)(2025)(High Z)2.xlsx..xlsx
- 88 - 40MVA 88-33kV (YNd1)(2025).xlsx..xlsx
- 90 - 40MVA 132-11kV (YNd1)(2025)(High Z).xlsx..xlsx
- 46\_10MVA 88-11kV YNd1.xlsx..xlsx
- 92 - 40MVA 132-22kV (YNd1)(2025).xlsx..xlsx
- 55- 10MVA 88-6.6kV (YNd1)(2025).xlsx..xlsx
- 63 - 20MVA 44-22kV (YNd1)(2025).xlsx..xlsx
- 42\_10MVA 44-6.6kV YNd1.xlsx..xlsx
- 75- 20MVA 132-3.3kV (YNd1)(2025-Yn).xlsx..xlsx
- 82 - 20MVA 66-11kV (YNd1)(2025).xlsx..xlsx
- 7\_2.5MVA, 22-2.2kV Yd9.xlsx..xlsx
- 78 - 20MVA 132-44-22kV (YNa0d1)(2025)).xlsx..xlsx
- 53\_10MVA 132-33kV YNd1.xlsx..xlsx
- 93 - 40MVA 132-33kV (YNd1)(2025)2.xlsx..xlsx
- 35\_5MVA 66-22kV YNd1.xlsx..xlsx
- 87 - 40MVA 88-22kV (YNd1)(2025).xlsx..xlsx
- 108 - 80MVA 88-33kV (YNd1)(2026).xlsx..xlsx
- 30\_5MVA 22-3\_3kV YNyn0.xlsx..xlsx
- 65 - 20MVA 66-22kV (YNd1)(2025).xlsx..xlsx
- 56 - 10MVA 22-2.2kV (YNyn0)(2025-Yn).xlsx..xlsx
- 81 - 20MVA 66-6.6kV (YNd1).xlsx..xlsx
- 111 - 160MVA 132-66-22kV (YNa0d1)(2026).xlsx..xlsx
- 16\_2.5MVA, 88-6.6kV YNd1.xlsx..xlsx
- 95 - 40MVA 132-88-22kV (YNa0d1)(2025)).xlsx..xlsx
- 25\_5MVA 66-11kV YNd1.xlsx..xlsx
- 84- 40MVA 66-22kV (YNd1)(2025).xlsx..xlsx
- 45\_10MVA 66-11kV YNd1.xlsx..xlsx
- 85 - 40MVA 88-11kV (YNd1)(2025).xlsx..xlsx
- 80 - 20MVA 22-11kV (YNyn0)(2025).xlsx..xlsx
- 49\_10MVA 88-33kV YNd1.xlsx..xlsx
- 26\_5MVA 66-22kV YNd1.xlsx..xlsx
- 44\_10MVA 66-22kV YNd1.xlsx..xlsx
- 17\_5MVA 22-11kV YNyn0.xlsx..xlsx
- 61- 20MVA 44-6.6kV (YNd1)(2025).xlsx..xlsx
- 50\_10MVA 132-6.6kV YNd1.xlsx..xlsx
- 22\_5MVA 44-2.2kV YNd1.xlsx..xlsx
- 13\_2.5MVA, 88-2.2kV Yd9.xlsx..xlsx
- 71 - 20MVA 88-6\_6kV (YNd1)(2025)(High Z).xlsx..xlsx
- 106 - 80MVA 132-66-22kV (YNa0d1)(2026).xlsx..xlsx

Documents download with a free BidWunder account.

## Published on

- [Eskom Tender Bulletin](https://tenderbulletin.eskom.co.za/tender/95858)
- [eTenders.gov.za](https://www.etenders.gov.za)

More open tenders: https://za.bidwunder.com/tenders.md

---

> Source: https://za.bidwunder.com/tenders/the-design-detailed-engineering-manufacture-testing-at-works-supply-shipping-tra-41978d44