Northern Cape Province - Northern Cape Province - Eskom Distribution, Northern Cape Operating Unit, GEMMA Cluster -
Organization Type
GOVERNMENT
Published
06 Nov 2026
OCDS Reference
ocds-9t57fa-177284
Summary
ESKOM is procuring a single-view condition monitoring solution for power transformers and hv circuit breakers rated 66 kv to 132 kv. The tender is an RFI, not a formal bid, so the main scope is information gathering for a future solution design. The single most consequential bidder consideration is that the etendering portal requires a valid csd number to access and submit any documents, so bidders without one cannot participate at all.
Key Requirements
Closing date: 07 December 2026 at 10:00 South African Standard Time. Submission: electronic upload via Eskom e-tendering page (https://etendering.eskom.co.za), no hard copies accepted, PDF and Excel format required, 500 MB per document, total 4 GB, ZIP files not permitted. Returnable documents: completed Excel workbook (Transformer and CB Monitoring RFI_24 Jul) with indicative pricing, and completed signed Part B response sheet. No mandatory briefing or site visit is stated. No eligibility thresholds, minimum scores, CIDB grades, B-BBEE levels, tax clearance, CSD registration, local content percentages, or professional registrations are required. No bid security, guarantee, retention, or financial capacity thresholds are stated. Respondents bear all costs of preparation and submission. Enquiries to Annelize Kruger, Senior Advisor, Procurement, [email protected], telephone 0833881580.
Request for Information (RFI): Provide a single view condition monitoring solution for power transformers and for HV circuit breakers (=66kV to =132kV)
Tender context
Return to this tender’s issuing organisation, province, or category.
Request for information (RFI): provide a single view condition monitoring solution for power transformers and for hv circuit breakers (=66kv to =132kv)
Briefing Session
Date & Time
Monday, 07 December 2026 - 10:00
Venue
null
Requirements & Eligibility
Eligibility Criteria
Tenders are to be uploaded via ESKOM tender bulletin site on the ESKOM e- tendering page: https://etendering.eskom.co.za
Document read. The full tender notice and its supporting documents are read end-to-end. Key sections, requirements, dates, and contact details are identified and pulled into a working summary you can act on.
Compliance review. The working summary is checked against South African procurement standards — PFMA, PPPFA, B-BBEE, CIDB, local content, and preferential procurement — so nothing critical is missed before you start your bid response.
DocumentTransformer and CB Monitoring RFI_24 July 2026.xlsReview complete
Description
Source: Transformer and CB Monitoring RFI_24 July 2026.xls
Important Dates
06 Nov
2026
PUBLICATION
Tender Published
Tender was published
07 Dec
2026
DEADLINE
Closing Date
Tender closing date
Procurement Rules & Compliance ContextThis tender may be governed by South African public procurement rules covering fairness, transparency, preferential procurement, anti-corruption, administrative justice and access to information.
10 rules
These references help suppliers understand the public-procurement framework around this opportunity. They are generated from the tender category, issuing organisation type and procurement context.
Core procurement rules
These rules commonly apply to South African public-sector procurement.
7
Broad-Based Black Economic Empowerment Act (B-BBEE Act)
Act 53 of 2003
high
Provides the empowerment-compliance context often used in public-sector supplier evaluation.
Relevant because this is a South African public-sector procurement opportunity.
Constitution of the Republic of South Africa, 1996 – Section 217
Act 108 of 1996 (s217)
high
This is general procurement context, not legal advice. Always verify requirements in the official tender documents and issuing authority notices.
E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf
A single view condition monitoring solution for power transformers and HV circuit breakers (≥66kV to ≤132kV) is being procured through an RFI market-testing exercise by Eskom in the Northern Cape.
Transformer and CB Monitoring RFI_24 July 2026.xls
Eskom requires information on a single-view condition monitoring solution that integrates all possible condition monitoring parameters for power transformers and for high-voltage circuit breakers rated 66 kV to 132 kV. Suppliers are to indicate which parameters can be measured, calculated or integrated into a single dashboard/health index solution, the IoT sensors and data types required, communication protocols, and total solution cost.
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Bid-ready summary
Request for Information seeking supplier input on a single view condition monitoring solution for power transformers and HV circuit breakers rated 66 kV to 132 kV.
Suppliers respond against a structured parameter schedule covering transformer monitoring (oil quality, life-cycle and insulation, load, partial discharge, OLTC, bushings, cooling) and circuit breaker monitoring (timing, speed, stroke, coils, SF6, charging mechanism).
For each parameter, suppliers indicate whether it is measured or calculated, the IoT sensors or devices needed, the data type, the communication protocol, the cost per parameter or function, and whether it can be integrated into a single dashboard or health index solution.
A solution showcase may be requested to demonstrate data acquisition, analytics, asset health assessment, dashboards, alarms, reporting and single-interface integration.
Evaluation Criteria
Source: Transformer and CB Monitoring RFI_24 July 2026.xls (unknown)
Desktop evaluation of RFI submissions
Submissions are assessed on the parameters and functions each supplier can measure or calculate, the IoT sensors or devices required, the data types supplied, the communication protocol used, and the cost attributable per parameter or function.
Suppliers must indicate whether each parameter can be integrated into a single dashboard or health index solution, and the total solution cost.
Where uncertainties remain after the desktop evaluation, suppliers may be invited to a solution showcase.
Showcase requirement: demonstrate a fully integrated condition monitoring platform covering both HV circuit breakers and power transformers, including data acquisition, analytics, asset health assessment, dashboards, alarms, reporting and a single user interface.
Technical Specifications
Source: Transformer and CB Monitoring RFI_24 July 2026.xls (unknown)
Objective
A single view condition monitoring solution for power transformers and for HV circuit breakers rated 66 kV to 132 kV.
All relevant condition monitoring parameters must be integrated into one user interface.
Transformer monitoring parameters
Oil quality: gas-in-oil content for up to 9 gases, rate of change of gas-in-oil, relative moisture in oil, water content in oil (ppm).
Life-cycle and insulation quality: top oil, bottom oil, hotspot, ambient and winding/core temperatures; moisture in insulating paper; ageing acceleration due to moisture; bubbling temperature and safety margin; breakdown voltage prediction; thermal ageing; thermal mode of OFAF-cooled transformers; ageing rate.
Load: load currents, overcurrents, last overcurrent, total overcurrent count, through-fault currents for winding deformation, load factor, overload capacity, emergency overloading time, loading time when cooling fails, apparent power, reactive power, power factor, losses, efficiency.
Partial discharge: transient earth voltage, radio frequency interference, ultra-high-frequency measurement, electromagnetic inductance.
Oil and gas systems: main tank oil level, main tank oil pressure, humidity of air inside the conservator, gas quantity and gradient in the Buchholz relay, state of protection and control devices.
Temperature: temperature differential, temperature balance, oil temperature, internal electronics temperature.
OLTC: tap position and operations, neutral time and movement time, motor drive and drive shaft condition, motor drive power consumption and running time, motor linkage, drive shaft movement, motor torque, drive shaft torque, oil carbonisation, oil level, contact wear, erosion and coking, tap currents, inrush current time, vacuum interrupter lifetime.
Alarms and maintenance: two alarm priorities when parameters exceed selected points, alarms for excessive actuations or total run time, alerts prompting maintenance based on run time and actuations, alert for incorrect loading and multiple tap counts, maintenance interval calculation, time to next service, OLTC inactive detection.
Control functions: motor drive unit heater control, reverse switching monitoring and auto cleaning.
Bushings: HV, MV and LV operating voltages, overvoltages and their count and last occurrence, capacitance change, temperature-compensated capacitance, tan delta and power factor change, temperature-compensated tan delta and power factor, leakage currents, load currents, capacitive displacement currents, relative phase angle, phase angle of imbalance current, operating temperature, PD pulse count, PD pulse amplitude (pC), PD index (mW), pressure in oil-filled bushings.
Cooling: inrush and steady current of fan banks and pumps, motor current index, oil flow through the cooling system, oil and air temperatures at cooler inlets and outlets, temperature differential across cooling radiators, cooling efficiency, running time of pumps and fans, time delay between cooler group starts, inrush current time, fan and pump operation status, equal use of all cooler groups, weekly motor run logic, failsafe mode on malfunction, cooler group failure and takeover, remaining motor lifetime, starts based on top oil, hotspot and forecasted temperature, lifetime consumption.
Circuit breaker monitoring parameters
General information: plant slot application, manufacturer, circuit breaker type, year of manufacture, R/W/B phase trip counter readings.
Nameplate data: voltage (kV), rated voltage (kV), rated amps (A), rated short circuit current (kA), frequency (Hz).
Timing per phase (R, W, B): main opening time, back-up opening time, closing time, open-close time, close-trip time (all ms).
Speed and stroke per phase: opening speed, closing speed (m/s), contact stroke (mm).
Charging and motor per phase: spring charging time (sec), motor operating voltage (V), motor peak current (A).
Coils per phase: close coil voltage and current, open coil voltage and current, main open coil current, back-up open coil current (V and A).
SF6 per phase: alarm pressure, blocking pressure, filling pressure (kPa), SF6 mass (kg).
For every parameter, suppliers must state whether it is measured or calculated, the IoT sensors or devices required, the data type supplied (static, time series, event data, counter data, metadata), the communication protocol used, and the cost attributable per parameter or function.
DocumentE3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdfReview complete
Description
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf
Eskom seeks information on a single-view condition monitoring solution for power transformers and HV circuit breakers (66 kV to 132 kV).
The solution should consolidate condition, operational and diagnostic data from multiple sensors into one platform, dashboard and/or asset health index.
The RFI is for market testing and strategy development only; it does not constitute a procurement and does not bind Eskom to any future process.
Detailed scope is in the attached Excel document (Transformer and CB Monitoring RFI_24 Jul).
Important Dates
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
Closing date: 07 December 2026 at 10:00 (South African Standard Time).
No briefing or site visit is stated.
Contact Information
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
Method: upload to Eskom Tender bulletin site on the Eskom e-tendering page
URL: https://etendering.eskom.co.za
Submission Guidelines
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
Submission method: electronic upload via the Eskom Tender bulletin site on the Eskom e-tendering page (https://etendering.eskom.co.za).
No hard copy submissions will be accepted.
No ZIP or condensed files may be uploaded.
Documents must be submitted in PDF and Excel format where applicable.
Upload size limit: 500 MB per document; total submission limited to 4 GB.
The supplier is responsible for ensuring submission before the closing date and time.
The submission status must be indicated as complete.
If a resubmission is made, only the latest version will be accepted; all previous submissions become null and void.
Supplier help manual and video are available on the Eskom e-tendering page.
Returnable documents:
Completed Excel document (Transformer and CB Monitoring RFI_24 Jul) with relevant information and indicative pricing for power transformers and/or HV circuit breakers, submitted in both Excel and PDF format.
Completed and signed RFI document (Part B response sheet).
Additional supporting information and documents may be submitted.
Evaluation Criteria
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
This is a Request for Information (RFI) for market-testing and information-gathering only; no award will be made.
Eskom will use responses to assess available technologies and suppliers on technical functionality, maturity, sensor/IoT requirements, communication protocols, integration capability, analytics, asset-health assessment, dashboards, alarms, reporting and cost.
Suppliers may be required to demonstrate how transformer and circuit-breaker monitoring parameters are integrated within a common user interface.
No scoring formula, preference point system, minimum qualifying score or eligibility thresholds are stated.
Technical Specifications
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
Eskom Distribution (GEMMA Cluster) is investigating an integrated online condition monitoring solution for power transformers and high-voltage circuit breakers (66 kV to 132 kV).
The solution must consolidate condition, operational and diagnostic data from multiple sensors and monitoring devices into a single monitoring platform, dashboard and/or asset health index for near real-time assessment.
Power transformers — parameters to integrate:
Dissolved gas analysis (DGA)
Moisture and oil condition
Thermal and insulation ageing
Loading
OLTC condition and operations
Bushing condition
Partial discharge
Cooling-system performance
Temperatures
Oil level and pressure
Associated alarms and maintenance indicators
HV circuit breakers (66 kV to 132 kV) — parameters to monitor:
Operating counters
Opening and closing times
Operating speeds and contact travel
Spring-charging mechanisms
Trip and close coils
Electrical contact resistance
SF6 gas-system parameters
RFI objectives:
Determine which parameters can be continuously measured or calculated online.
Assess sensors, IoT devices and communication protocols required.
Establish whether parameters can be consolidated into a single dashboard and asset health index.
Evaluate real-time monitoring, trending, diagnostics, alarms, analytics and automated reporting.
Determine early-warning capability for equipment deterioration and developing failures.
Assess support for condition-based and predictive maintenance, maintenance prioritisation and asset life-cycle management.
Understand cost per monitoring function and total integrated solution cost.
Assess solution maturity and integration capability before any pilot, technology evaluation or procurement.
Detailed scope of work is in the attached Excel document (Transformer and CB Monitoring RFI_24 Jul).
Pricing Schedule
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf
Indicative pricing is requested optionally and must be entered in the Excel document for power transformers and/or HV circuit breakers.
The completed Excel document must be submitted in both Excel and PDF format.
No pricing form, bill of quantities or payment schedule is otherwise provided.
Financial Requirements
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
Indicative pricing is requested optionally and must be provided in the Excel document for power transformers and/or HV circuit breakers.
No bid security, guarantee, retention, payment terms or financial capacity thresholds are stated.
Respondents bear all costs of preparing and submitting their response; Eskom will not reimburse any costs.
Compliance Requirements
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf (unknown)
No mandatory eligibility requirements (CSD registration, tax compliance, B-BBEE level, CIDB grading, professional registrations, local content) are stated for this RFI.
Respondents must not submit sensitive or confidential information; all information provided may be used by Eskom without acknowledgement and without creating any rights, including intellectual property rights.
Submission of a response constitutes acceptance of the RFI terms and conditions.
Contractual Terms
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf
This RFI is a stand-alone information-gathering and market-testing exercise and does not create any contractual obligation on Eskom.
Eskom may, at any stage and without notice, terminate participation, select or disqualify any respondent, or amend or terminate the RFI process.
Information submitted may be used by Eskom without acknowledgement and without the respondent gaining any rights, including intellectual property rights.
No information submitted will be treated as confidential; respondents must not submit sensitive or confidential information.
Respondents bear all costs of responding; Eskom will not be liable for any costs.
Section
Source: E3799DXNCOU - Request for Information (RFI) Transformer and CB Monitoring.pdf
Responses will be assessed on technical functionality, solution maturity, sensor/IoT requirements, communication protocols, integration capability, analytics, asset-health assessment, dashboards, alarms, reporting and cost.
Suppliers may be asked to demonstrate integration of transformer and circuit-breaker monitoring parameters in a common user interface.
No scoring formula or minimum threshold is stated.
DocumentE-tendering Help Manual for supplier.docxReview complete
Description
Source: E-tendering Help Manual for supplier.docx
The eTendering system is Eskom's web-based platform for the electronic submission of tender documents, replacing physical delivery to Eskom tender offices.
Tenders are advertised on the Tender Bulletin and accessed through the eTendering portal.
Suppliers register their details before being granted access.
A one-time PIN is sent to the registered cell phone and email address at each login.
The portal also supports "closed tenders": tenders not listed on the Tender Bulletin, sent by email link to selected potential suppliers who meet the selection and evaluation criteria.
Contact Information
Source: E-tendering Help Manual for supplier.docx (unknown)
System support
Contact: the buyer responsible for the published tender (no name, email or telephone stated in this manual).
Northern Cape Province - Northern Cape Province - Eskom Distribution, Northern Cape Operating Unit, GEMMA Cluster -
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High source confidence
Official source
eTenders.gov.za
Documents found
3
Last checked
07 Nov 2026
AI status
Enhanced
Data conflicts
None detected
This tender has strong source evidence, including source metadata and supporting tender information synced from the government tender portal.
Tenders SA is not the issuing authority. All tenders are automatically synced from the official government tender portal. Always confirm final submission details, closing dates, briefing sessions, eligibility requirements, and documents on the official government portal before applying.