[Design, detailed engineering, supply, erection, testing, commissioning and establishment of (i) Kavathampalayam 765/400 kV AIS SS along with 765 kV and 400 kV Transmission Lines and (ii) Edayarpalayam 400/230-110 KV AIS SS under TBCB (BOOT model) ]

AI summary

This tender provides details about the project including scope of work, estimated value, deadlines, and eligibility requirements.

Overview

TNEB Limited has published an open tender for the design, detailed engineering, supply, erection, testing, commissioning, and establishment of two substations: Kavathampalayam 765/400 kV AIS SS and Edayarpalayam 400/230-110 KV AIS SS under the TBCB (BOOT model). This tender is categorized under electrical works and follows a tender cum auction contract form.

Scope / Work

The scope includes:

Design and detailed engineering of the substations.
Supply and erection of necessary equipment.
Testing and commissioning of the substations.
Establishment of 765 kV and 400 kV transmission lines.

Bidders are advised to refer to the tender documents for specific pre-qualification requirements and additional details.

Fees & EMD

Tender Fee: There is no tender fee associated with this bid.
EMD (Earnest Money Deposit): A fixed EMD of ₹35,00,00,000 is required. No exemptions are allowed for the EMD.

Key Dates

Publish Date: 13-Feb-2026 05:00 PM
Pre-Bid Meeting: 02-Mar-2026 11:00 AM at TANTRANSCO HQ, Chennai.
Bid Submission Start Date: 25-Mar-2026 03:00 PM
Bid Submission End Date: 27-Apr-2026 11:00 AM
Bid Opening Date: 27-Apr-2026 03:00 PM
Clarification Period: 13-Feb-2026 to 08-Apr-2026.

Bidders should ensure timely submission of documents and adherence to the specified timelines to avoid disqualification.

AI insights

Risk factors

high EMD requirement
tight bid submission timeline
no tender fee
no exemptions for EMD

Financials

Tender value	Undisclosed
EMD amount	₹35,00,00,000 — payable to Nil at Nil
Tender fee	₹0.00 — payable to Nil at Nil

Payment mode Online

Timeline

Publish date	13-Feb-2026 05:00 PM
Bid end	27-Apr-2026 11:00 AM
Opening date	27-Apr-2026 03:00 PM

Documents available from 13-Feb-2026 05:00 PM to 27-Apr-2026 11:00 AM. Clarification window: 13-Feb-2026 05:00 PM to 08-Apr-2026 05:00 PM.

Tender Documents

How tender documents work

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Name	Size	Type	Action
Ariyalur_765kVSSlines.rar	7.43 MB	RAR	This file type cannot be previewed in the browser. Download it to open on your device. Download Sign-in required · same daily limit as viewing
BOQ_786286.xls	360.5 KB	XLS	View document Sign-in required
DrawingsEdayarpalayam400KVSS.rar	6.98 MB	RAR	This file type cannot be previewed in the browser. Download it to open on your device. Download Sign-in required · same daily limit as viewing
Drawingskavathampalayam.rar	7.59 MB	RAR	This file type cannot be previewed in the browser. Download it to open on your device. Download Sign-in required · same daily limit as viewing
RFP2363.pdf	2.25 MB	PDF	View document Sign-in required
SPA2363.pdf	495.51 KB	PDF	View document Sign-in required
SPVAcquisition2363.pdf	786.58 KB	PDF	View document Sign-in required
TSA2363.pdf	2.48 MB	PDF	View document Sign-in required
CORRIGENDUM4.pdf	309.02 KB	PDF	View document Sign-in required
CORRIGENDUM3.pdf	158.3 KB	PDF	View document Sign-in required
CORRIGENDUM-2.pdf	141.58 KB	PDF	View document Sign-in required

Corrigenda

Official amendments and notices. PDFs open in the same viewer as tender documents (sign in, verified email, daily limit applies).

Pre bid and due date extension

Type Date

Published Corrigendum Details Date : 12-Apr-2026 12:18 AM [Tender information] Organisation Chain : TNEB Limited||TANTRANSCO||CE-Transmission - TANTRANSCO Tender ID : 2026_EB_655679_1 Tender Ref No : T-2363 Tender Title : Design, detailed engineering, supply, erection, testing, commissioning and establishment of (i) Kavathampalayam 765/400 kV AIS SS along with 765 kV and 400 kV Transmission Lines and (ii) Edayarpalayam 400/230-110 KV AIS SS under TBCB (BOOT model) Corrigendum Type : Date [Corrigendum:1] Corrigendum title: Pre bid and due date extension Description: Pre bid and due date extension Published: 30-Mar-2026 01:31 PM Document: CORRIGENDUM4.pdf Size (KB): 309.02 Publish Date: 13-Feb-2026 05:00 PM │ Bid Opening Date: 27-Apr-2026 03:00 PM Document Download/Sale Start Date: 13-Feb-2026 05:00 PM │ Document Download/Sale End Date: 27-Apr-2026 11:00 AM Clarification Start Date: 13-Feb-2026 05:00 PM │ Clarification End Date: 08-Apr-2026 05:00 PM Bid Submission Start Date: 25-Mar-2026 03:00 PM │ Bid Submission End Date: 27-Apr-2026 11:00 AM Pre Bid Meeting Date: 02-Mar-2026 11:00 AM [Critical Dates] [Details Before Corrigendum] Publish Date: 13-Feb-2026 05:00 PM │ Bid Opening Date: 10-Apr-2026 04:30 PM Document Download/Sale Start Date: 13-Feb-2026 05:00 PM │ Document Download/Sale End Date: 10-Apr-2026 12:00 PM Clarification Start Date: 13-Feb-2026 05:00 PM │ Clarification End Date: 25-Mar-2026 12:00 PM Bid Submission Start Date: 25-Mar-2026 03:00 PM │ Bid Submission End Date: 10-Apr-2026 12:00 PM Pre Bid Meeting Date: 02-Mar-2026 11:00 AM [Critical Dates]

File	Size	Type	Action
CORRIGENDUM4.pdf	309.02	PDF	View document Sign-in required

Demo of Tender process in NIC PORTAL

Type Other

Published Corrigendum Details Date : 12-Apr-2026 12:18 AM [Tender information] Organisation Chain : TNEB Limited||TANTRANSCO||CE-Transmission - TANTRANSCO Tender ID : 2026_EB_655679_1 Tender Ref No : T-2363 Tender Title : Design, detailed engineering, supply, erection, testing, commissioning and establishment of (i) Kavathampalayam 765/400 kV AIS SS along with 765 kV and 400 kV Transmission Lines and (ii) Edayarpalayam 400/230-110 KV AIS SS under TBCB (BOOT model) Corrigendum Type : Other [Corrigendum Document Details]

File	Size	Type	Action
CORRIGENDUM3.pdf	158.3	PDF	View document Sign-in required
CORRIGENDUM-2.pdf	141.58	PDF	View document Sign-in required

Work details

Location, category, and schedule for this procurement.

Location	Chennai
Category	Electrical Works
Bid validity	180 days

Tender basics

Tender type	Open Tender
Form of contract	Tender cum Auction
Tender category	Works
No. of covers	2
Organisation chain	TNEB Limited\|\|TANTRANSCO\|\|CE-Transmission - TANTRANSCO
Source portal	tntenders.gov.in

Authority details

Inviting authority	Chief Engineer/Transmission
Address	Chief Engineer/ Transmission, V Floor, TANTRANSCO HQ, 144, Anna Salai, Chennai- 600 002.
Payment instruments	Online

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NA Tender cum Auction TNEB Limited Transmission Along Boot Commissioning Design Detailed open-tender electrical-works