Refurbishment of 500kva Distribution Transformer at Various 11kv Substation Ring Are 6 Substation and Each Subs Contain 2 Transformer Vhd East and 20mva, 25kv Traction Substation Iswepe Under the Control of the Depot Engineer, Vryheid

TRIM/2026/03/0200/2196/RFQ

2026-05-25 10:30

Tender Closed on: 2026-06-12 10:00

Transnet SOC Ltd

Electrical Equipment and Supplies, Electrical Services, Repair, Service and Maintenance of Machinery and Equipment, Transformer Supplies, Installation and Maintenance

KwaZulu-Natal, Mpumalanga, Vryheid

Transnet SOC Ltd

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Tender Reference Number: Published

TRIM/2026/03/0200/2196/RFQ

Name of Tender:

Refurbishment of 500KVA Distribution transformer at various 11KV substation Ring are 6 Substation and each subs contain 2 transformer VHD EAST and 20MVA, 25KV Traction substation Iswepe under the control of the Depot Engineer, Vryheid

Description:

Refurbishment of 500KVA Distribution transformer at various 11KV substation Ring are 6 Substation and each subs contain 2 transformer VHD EAST and 20MVA, 25KV Traction substation Iswepe under the control of the Depot Engineer, Vryheid

Tender Type:

RFQ

Contact Person:

Mmabatho Mankga

Contact Person Email Address:

[email protected]

Briefing Details:

The Briefing Details section provides important information regarding any scheduled meetings, site visits, or pre-tender briefings related to the tender. This may include the date, time, location, format (physical or virtual), and any requirements for attendance. It ensures that potential bidders have all necessary details to participate in the briefing, ask questions, and gain clarity on the tender process before submission.

Date Published:

05/18/2026

Time Published:

09:10:27 PM

Closing Date:

06/12/2026 10:00:00 AM

Briefing Date And Time:

10:30:00 AM

Location Of Service:

VRYHEID

Tender Category:

NEC


Tender Summary

Objectives

The primary objective of this tender is to refurbish and upgrade the 500kVA distribution transformers located at various 11kV substations, including six substations each containing two transformers (VHD East and others), as well as a 20MVA, 25kV traction substation at Iswepe under the control of the Depot Engineer, Vryheid. The aim is to ensure reliable operation, extend transformer lifespan, and maintain operational efficiency across the substations.

Scope

The scope of work includes:

  • Refurbishment of 500kVA transformers at multiple substations, including testing, repair, and commissioning.
  • Oil sampling before and after refurbishment.
  • Replacement of silica gel and repair or replacement of leaking HV & LV bushings and gaskets.
  • Painting transformers and conservator tanks.
  • Oil purification, topping up, and pre-commissioning tests.
  • Site acceptance testing (SATs) and preliminary & general activities.
  • Removal of oil contaminated materials around transformers at Iswepe substation.

Note: The bill of quantities does not include certain items, which have been concluded to be outside the scope of work.

Technical Requirements

The technical requirements encompass:

  • Oil testing before and after refurbishment.
  • Oil purification and topping up with virgin oil.
  • Replacement of silica gel and repair of leaks in bushings and gaskets.
  • Painting and cleaning of transformers, conservator tanks, and associated components.
  • Pre-commissioning and site acceptance testing to verify transformer performance.
  • Adherence to specified standards and procedures for testing, repair, and commissioning.

Skills Requirements

The tenderer must possess:

  • Qualified electrical engineers and technicians experienced in transformer refurbishment, testing, and commissioning.
  • Capability to perform oil sampling, analysis, and purification.
  • Proficiency in repairing and replacing bushings, gaskets, and other transformer components.
  • Experience in painting and cleaning high-voltage equipment.
  • Knowledge of site safety standards and procedures during refurbishment activities.
  • Ability to conduct site acceptance tests and document results accurately.
This summary is AI generated. Download the tender documents for all the information.

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