CALIBRA ELECTRIC INDUSTRIES
Bid submission
D-TX-2026-0047
Tender Bid Submission
Supply & Delivery of 132/33 kV Power Transformers — Five (5) Units
Calibra Electric Industries · India
India, 28 April 2026
To: Eng. Aisha Al-Mansoori
Senior Procurement Lead — Transmission
ACME, Abu Dhabi, UAE
Re: RFQ D-TX-2026-0047 — Supply & Delivery of 132/33 kV Power Transformers
Dear Eng. Al-Mansoori,
We are pleased to submit our bid for the supply and delivery of five (5) 132/33 kV, 40 MVA, oil-immersed power transformers in response to the Request for Quotation referenced above. Our submission has been prepared in full conformance with the structure of the RFQ, with a clause-by-clause Compliance Statement provided in Section 4 of this document.
Calibra Electric Industries confirms its commitment to the technical specification under §3 of the RFQ, the Commercial requirements under §6, and the HSE and ICV obligations under §§7 and 8. Our delivery commitment is 36 weeks ARO, our lump-sum bid is AED 11,720,000.00, and our offer is valid for 120 days from the closing date.
We confirm that the information contained in this submission is accurate to the best of our knowledge, and that Calibra Electric Industries is duly authorised to enter into a contract on the terms set out herein. We look forward to the opportunity to support ACME’s Northern Grid expansion programme.
Yours sincerely,
Calibra Electric Industries is pleased to offer five (5) 132/33 kV, 40 MVA, ONAN/ONAF cooled, two-winding, three-phase oil-immersed power transformers, vector group YNd11, in conformance with ACME specification S-ELE-TRF Rev 4 and the IEC 60076 series.
| Lump-sum bid | AED 11,720,000.00 |
|---|---|
| Per unit | AED 2,344,000.00 |
| Lead time | 36 weeks ARO |
| ICV score | 33.0% |
| Bid validity | 120 days from RFQ closing |
| Payment terms | 20/70/10 |
| Warranty | 3 years from SAT |
Our offer combines (a) compliance with the ACME technical envelope, (b) full IEC 60076-1/2/3 type test cover, and (c) a delivery slot already reserved in our manufacturing schedule. Our project team, led by Rajinder Singh, has prior experience delivering 132 kV-class transformers on regional networks. Section 11 lists our reference projects.
This document is structured as follows: §4 Compliance Statement, §5 Technical Proposal, §6 Type Tests, §7 Manufacturing & FAT, §8 Commercial Proposal, §9 BoQ, §10 Delivery Schedule, §11 Reference Projects, §12 ICV, §13 HSE, §14 Method Statements, §15 Personnel CVs, §16 Bond, §17 Warranty, §18 Appendices.
The Supplier confirms its compliance with §3 of the RFQ on a clause-by-clause basis as follows.
| Clause | Topic | Status | Vendor note |
|---|---|---|---|
| §3.1 | Vector group YNd11 | Comply | YNd11 confirmed. |
| §3.2 | Cooling class ONAN/ONAF | Comply | ONAN/ONAF — 100% rated capacity at ONAN. |
| §3.3 | Insulation system | Comply | Inhibited mineral oil per IEC 60296. |
| §3.4 | BIL HV 650 / LV 170 kVp | Comply | 650 / 170 kVp. |
| §3.5 | Losses (NLL ≤ 28 / LL ≤ 165 kW) | Comply | 28 kW NLL / 164.2 kW LL @ 75 °C. |
| §3.6 | Short-circuit impedance 12.5% ± 7.5% | Comply | Within tolerance band. |
| §3.7 | Bushing — OIP per IEC 60137 | Comply | OIP HV / Resin LV — Trench |
| §3.8 | Tap changer ±9 × 1.25% | Comply | OLTC, vacuum interrupter, motor-driven. |
| §3.9 | FAT per IEC 60076-1 §10 | Comply | Witness welcomed at routine + impulse + SC. |
| §3.10 | Environmental (50 °C, dust class B) | Comply | Designed for the UAE envelope. |
| Clause | Topic | Status | Vendor note |
|---|---|---|---|
| §5 | Submission requirements | Comply | All sections per §5 included. |
| §5(b) | Compliance statement | Comply | This document, §4. |
| §5(c) | Technical proposal | Comply | §5–§7 of this submission. |
| §5(d) | Type test reports | Comply | CPRI Bangalore — CEI-CPRI-23-0612 (19 January 2024). |
| §5(e) | Bill of quantities | Comply | §9 of this submission. |
| §5(f) | Delivery schedule | Comply | §10 of this submission. |
| §5(g) | Reference projects | Comply | §11 of this submission. |
| §5(h) | Valid ICV certificate | Comply | Score 33.0% — Cert ICV-AE-2025-CEI-0143. |
| §5(i) | Method statements | Comply | §14 of this submission. |
| §5(j) | Personnel CVs | Comply | §15 of this submission. |
| §6 | Commercial requirements | Comply | Acknowledged. Payment per §6 of RFQ. |
| §7 | HSE | Comply | ISO 45001 / 14001 cover; method statements §14. |
| §8 | ICV | Comply | Above 30% threshold. |
Where "Partial" or "Not submitted" is marked, the Supplier confirms its commitment to provide the requested item at contract execution stage and to engage with ACME’s Procurement Lead within 14 days of any clarification request.
The transformer offered is a 132/33 kV, 40 MVA, three-phase, two-winding, oil-immersed power transformer. Vector group YNd11. ONAN/ONAF cooling (100% capacity at ONAN). Designed for ambient conditions of 50 °C max., humidity 95%, sand and dust class B per IEC 60721-3-3.
| Voltage ratio | 132 ± 9×1.25% / 33 kV |
|---|---|
| Rated power | 40 MVA (ONAN) / 40 MVA (ONAF) |
| Frequency | 50 Hz |
| Vector group | YNd11 |
| Connection | HV: Star, neutral brought out · LV: Delta |
| Oil type | Inhibited mineral oil per IEC 60296 |
| Insulation system | Class A, paper-oil insulated |
| Cooling fans | 2 banks of 4 fans per unit; staged duty |
| Footprint | 5,400 × 3,500 mm (LxW), 4,300 mm overall height |
| Total weight | 62 tonnes (with oil), 48 tonnes (without) |
The design follows our established 132 kV-class platform with a copper-strip continuously-transposed-conductor (CTC) HV winding, a CTC LV winding, and a 5-leg core-form magnetic circuit. The conservator is air-cell type with desiccant breather. Pressure relief is via spring-loaded valve with electrical contact to SCADA.
Core: 5-leg core-form, grain-oriented silicon steel laminations, mitred and step-lapped. Flux density 1.62 T at rated voltage. Stress-relieved.
HV winding: Copper-strip CTC, paper-insulated. Disc-type construction with interleaving for impulse stress distribution.
LV winding: Helical CTC. Concentric to the HV winding.
Tap changer: On-load, vacuum interrupter, motor-driven, ±9 × 1.25%, located on HV winding. Make/model: see §5.4 below.
| Vector group | YNd11 |
|---|---|
| BIL HV / LV | 650 / 170 kVp |
| Short-circuit impedance | 12.4% on principal tap |
| Tap range | ±9 × 1.25% (HV) |
| Tap changer | Reinhausen MS III on-load |
| Insulation level | Class A, ester-resistant |
| Conductor class | Copper, CTC, paper insulated |
Note on impedance tolerance: Our guaranteed value of 12.4% sits comfortably inside the ±7.5% tolerance band of §3.6, leaving margin for fault-level studies under future loading.
The bushing technology offered for this contract is summarised below.
| HV bushings | OIP HV / Resin LV — Trench |
|---|---|
| HV rated voltage | 145 kV / 800 A min. |
| LV rated voltage | 36 kV / 1250 A min. |
| Bushing manufacturer | Trench India |
| IEC reference | IEC 60137:2017 |
| Tap-out provisions | Capacitance and dissipation factor tap (HV) |
OIP bushings are the standard offering on our 132 kV-class transformer line, with all type tests for the bushing-transformer interface conducted at CPRI Bangalore.
Cooling system: ONAN/ONAF — 2 cooler banks of 4 fans each, sequenced by oil and winding temperature. Stage 1 fans engage at 70 °C top oil; Stage 2 at 80 °C.
| No-load loss (NLL) | 28.0 kW |
|---|---|
| Load loss (LL) @ 75 °C | 164.2 kW |
| Total losses @ rated | 192.2 kW |
| Reference temperature | 75 °C |
| Penalty rate (NLL) | AED 18,000 per kW |
| Penalty rate (LL) | AED 8,500 per kW |
Losses are guaranteed values, measured at the FAT in accordance with IEC 60076-1 §11.4 (no-load loss) and §11.5 (load loss). Penalty rates apply if measured values exceed guaranteed values; bonus rates do not apply.
| Buchholz relay | Twin-float, gas-collection chamber, alarm + trip contacts |
|---|---|
| Pressure relief | Spring-loaded, indicator + electrical contact |
| Oil temperature indicator (OTI) | Pt-100 sensors with SCADA interface |
| Winding temperature indicator (WTI) | Image method, calibrated against thermal model |
| Online DGA | Continuous monitoring with DNP3 / IEC 61850 reporting |
| Tap-changer monitoring | Contact wear, drive torque, position indicator |
| Marshalling kiosk | IP55, fan-cooled, with interposing relays |
The integrated marshalling kiosk supports both DNP3 v3 and IEC 61850 Edition 2.1 with goose subscriptions. The protection & control interface terminates on a fibre patch panel for connection to the substation SAS. SBOM disclosure is available on request under NDA.
Type tests are conducted on the type-design transformer offered for this contract at the testing facilities of CPRI Bangalore. The reports are available for review on request.
| Test laboratory | CPRI Bangalore |
|---|---|
| Test report no. | CEI-CPRI-23-0612 |
| Test date | 19 January 2024 |
| Coverage — IEC 60076-1 | Routine + temperature rise (Yes) |
| Coverage — IEC 60076-2 | Yes |
| Coverage — IEC 60076-3 | Lightning impulse · switching impulse (Yes) |
| Coverage — IEC 60076-5 | Pending — to be witnessed at FAT |
| Witness available | Yes — ACME witness welcomed |
| Standard | Status | Issued by | Issued |
|---|---|---|---|
| ISO 9001:2015 — QMS | Active | TÜV | 2024 |
| ISO 14001:2015 — EMS | Active | TÜV | 2024 |
| ISO 45001:2018 — HSMS | Active | BV | 2024 |
| ISO/IEC 27001:2022 — ISMS | Active | BSI | 2024 |
Copies of the above certificates are available on request. Renewal cadence is tracked in our QMS document control system, Calibra Electric Industries Document Control SOP-08.
The transformers will be manufactured at our principal works in India. The manufacturing plan is summarised below; the full Gantt chart is provided in §10.
| Wk | Milestone | Status gate |
|---|---|---|
| 1–4 | Engineering — design freeze, approval drawings to ACME | Drawings approval gate |
| 5–8 | Material procurement — core steel, copper, oil, bushings | Material PO gate |
| 9–14 | Core assembly & winding manufacture | Internal QC gate |
| 15–18 | Tank fabrication, accessory fitment, oil filling | Pre-FAT inspection |
| 29–32 | Factory Acceptance Test (ACME witnessed) | FAT certificate |
| 33–35 | Packaging, transportation prep, port handover | Logistics handover |
| 36 | Delivery to Northern Grid SS, Al Wathba | Site receipt |
FAT is conducted in accordance with IEC 60076-1 §10 at our principal works. ACME’s nominated witness representatives are welcome on the dates set out below.
| FAT step | IEC reference | ACME witness? |
|---|---|---|
| Insulation resistance & ratio | IEC 60076-1 §11.1 | Yes |
| Winding resistance | IEC 60076-1 §11.2 | Yes |
| No-load loss measurement | IEC 60076-1 §11.4 | Yes — guaranteed value test |
| Load loss & impedance | IEC 60076-1 §11.5 | Yes — guaranteed value test |
| Lightning impulse withstand | IEC 60076-3 §13 | Yes |
| Switching impulse withstand | IEC 60076-3 §14 | Yes |
| Temperature rise (representative unit) | IEC 60076-2 | Optional |
| Short-circuit withstand | IEC 60076-5 | Optional (3rd-party type-test) |
FAT witness travel and accommodation are organised by the ACME team. Vendor support is provided at no additional cost to two witness representatives for up to five business days.
| Lump-sum bid | AED 11,720,000.00 |
|---|---|
| Per unit | AED 2,344,000.00 |
| Currency | AED, fixed-price |
| Validity period | 120 days from RFQ closing |
| Incoterms | FCA JNPT |
| Payment terms | 20/70/10 (advance / milestones / SAT) |
| Performance bond | 10% of contract value, valid through warranty + 30 days |
| Liquidated damages | 0.1% per week of delay, capped at 10% |
| Liability cap | 100% of contract value (excluding wilful misconduct & IP) |
Calibra Electric Industries provides a 5-day on-site commissioning engineer at the day-rate set out in §9 BoQ Item 5. Additional commissioning support is available on request.
| # | Item | Qty | Unit | Unit price (AED) | Line total (AED) |
|---|---|---|---|---|---|
| 1 | 132/33 kV, 40 MVA, ONAN/ONAF, YNd11 power transformer — complete | 5 | ea | 1,828,320.00 | 9,141,600.00 |
| 2 | Standard accessories: conservator, breather, OTI/WTI, marshalling kiosk, online DGA module | 5 | set | 234,400.00 | 1,172,000.00 |
| 3 | Inhibited mineral oil (IEC 60296), per unit fill including 5% topping reserve | 5 | fill | 140,640.00 | 703,200.00 |
| 4 | Factory Acceptance Test execution, witnessing & FAT report | 5 | ea | 70,320.00 | 351,600.00 |
| 5 | On-site commissioning engineer support — 5 days per unit | 25 | day | 11,720.00 | 293,000.00 |
| 6 | Packaging, handling, transport to FCA point | 5 | ea | 11,720.00 | 58,600.00 |
| Total — fixed-price lump sum (matches §8 above) | AED 11,720,000.00 | ||||
All prices in AED, fixed-price for the contract duration. Tie-out: BoQ total of AED 11,720,000.00 matches Commercial Proposal §8 lump sum.
Calibra Electric Industries commits to delivery of 36 weeks ARO (after receipt of order). The Gantt below sets out the milestone dates against this commitment.
| Week | Milestone | Cumulative |
|---|---|---|
| 0 | Contract award · advance bond paid | 0% |
| 4 | Engineering complete · drawings submitted | 10% |
| 8 | Material POs placed · long-lead items secured | 22% |
| 14 | Core/winding fabrication 50% complete | 40% |
| 28 | Tank assembled, oil-filled, pre-FAT | 72% |
| 30 | Unit 1 FAT — ACME witness | 78% |
| 32 | Unit 3 FAT — ACME witness | 86% |
| 34 | Unit 5 FAT — ACME witness | 92% |
| 35 | Logistics handover, packaging, port loading | 97% |
| 36 | Delivery to Northern Grid SS, Al Wathba | 100% |
Note: The proposed lead time of 36 weeks is 10 weeks beyond the required 26-week window. Liquidated damages per §6 of the RFQ apply.
| Client | Country | Voltage | MVA | Year | Scope |
|---|---|---|---|---|---|
| PT PLN | Indonesia | 150/20 kV | 60 | 2023 | Java network reinforcement |
| EGAT Thailand | Thailand | 115/22 kV | 50 | 2022 | Bangkok ring expansion |
| KEPCO | Korea | 154/22.9 kV | 60 | 2024 | Incheon coastal |
The reference projects above represent only the most relevant 132 kV-class engagements in the last seven years. A full reference list with more than 80 projects across our active manufacturing programme is available on request, subject to confidentiality.
This is to certify that
has been assessed for the UAE In-Country Value Programme as set out under Federal Decree No. 3 of 2017, and has achieved an In-Country Value Score of:
| Issued on | 15 January 2025 |
|---|---|
| Valid until | 2027-02-25 |
| Audit firm | PwC Middle East |
| Certificate validity | One year, renewable |
This certificate confirms compliance with the ICV programme requirements as set out in the Procurement Standard. The score reflects the supplier’s contribution to the UAE economy through investment, in-country manufacturing, Emiratisation, and supplier diversity.
| HSMS standard | ISO 45001:2018 |
|---|---|
| HSE policy | Reviewed annually; signed by CEO |
| LTI rate (last 3 years) | 0.8 per million man-hours |
| Major incidents (last 3 years) | None |
| Method statements | §14 of this submission |
| Risk register | Live, weekly review with site team |
| PPE policy | ACME-aligned; site induction mandatory |
| HSE training | NEBOSH IGC for site management; IOSH for operatives |
Calibra Electric Industries confirms its commitment to ACME HSE Standard S-HSE-VND Rev 6 throughout manufacturing, factory testing, transportation and on-site activities. Lifting plans for off-loading and positioning of transformers at site shall be approved by the Buyer’s HSE representative prior to mobilisation.
Grain-oriented silicon steel laminations are received under controlled humidity, inspected for surface integrity, and trim-cut against the design lamination plan. Step-lap mitres are applied at corners. The completed core is stress-relieved at 200 °C for 4 hours.
Continuously-transposed conductor (CTC) is wound on machined formers under controlled tension. Inter-disc and end-disc insulation is applied per the design pattern.
Tank welds are X-ray inspected at agreed points. Hydraulic pressure test at 1.5× design pressure for 30 minutes. Vacuum dehydration prior to oil-fill.
Six internal QC gates are observed: design freeze, material acceptance, core complete, winding complete, tank complete, and pre-FAT. Each gate produces an internal QC certificate.
Off-loading from the low-bed truck uses a 250-tonne mobile crane. The lift plan is reviewed by the ACME HSE representative prior to mobilisation. Spotters are positioned at all four corners of the pick-up area.
Transformer is rolled to its plinth on greased steel skates with a hydraulic push-pull unit. Final positioning is confirmed against the GA drawing.
Vacuum oil-fill is performed in three stages, with degassed oil pumped through a vacuum-treatment plant. Final oil sample is analysed for moisture and breakdown voltage prior to energisation.
Commissioning follows the SAT procedure agreed with ACME. Insulation resistance, ratio, oil DGA, and online DGA functional tests are performed. The on-site commissioning engineer is on-site for 5 days per unit, billed at the rate in §9 BoQ Item 5.
| Name | Rajinder Singh |
|---|---|
| Role | Project Manager — ACME D-TX-2026-0047 |
| Years' experience | 15 years (12 in transformer manufacturing) |
| Education | BEng Electrical Engineering · MSc Power Systems |
| Professional registration | National PE |
| PMI / Prince2 | PMP certified, 2018 |
| Role | Name | Years | Key engagement |
|---|---|---|---|
| Lead Engineer | Eng. K. Park | 17 | 132 kV-class winding design |
| FAT Engineer | Eng. K. Ito | 12 | IEC 60076-1 §10 FAT execution |
| Site Commissioning | Eng. M. Volkov | 11 | 132 kV substation commissioning |
Detailed CVs (3–4 pages each) are available on request, subject to GDPR/PDPA constraints.
Date: 28 April 2026
Reference: PB-018-2026
To: ACME, Procurement Department, Abu Dhabi, UAE
RE: Performance Bond — RFQ D-TX-2026-0047 — Calibra Electric Industries
We hereby confirm that Calibra Electric Industries has been pre-approved for an irrevocable, on-demand performance bond of AED 1,172,000.00 (10% of contract value), valid through the warranty period and thirty (30) days thereafter, in connection with the above-referenced Request for Quotation.
This pre-approval is valid for issuance within 30 days of any contract award, against the standard ACME performance bond template.
Yours sincerely,
(stamped & signed)
Trade Finance Manager
| Warranty period | 3 years from SAT issue (or 42 months from delivery, whichever is earlier) |
|---|---|
| Scope | Full transformer + accessories |
| Critical-fault response | 48 hours |
| Replacement parts | Held in stock at our principal works; expedited shipment |
| On-line monitoring | Included for warranty duration |
| Liability cap | 100% of contract value |
The warranty does not cover damage caused by mis-operation outside the design envelope, lightning strikes outside the BIL withstand level, or loss arising from third-party intervention. The warranty is unconditional on the items in scope and is honoured worldwide.
Standard ACME terms accepted. UAE law / ADGM courts as exclusive jurisdiction. No material reservations.
GA drawings, foundation loading details, and oil-cooler piping schematics are available as full A1 prints on contract award. Three A4 reductions are provided in the digital submission package.
Lightning impulse, switching impulse, and chopped-wave curves from CPRI Bangalore (report CEI-CPRI-23-0612) are appended in the digital submission.
Datasheets for the core steel, copper conductor, oil, paper, and bushing porcelain are included.
Calibra Electric Industries appreciates the opportunity to submit this bid. We look forward to ACME’s clarification questions and the opportunity to support the Northern Grid Switching Station programme.
— end of submission —