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High-voltage power transformer
Powering what's next

Engineering power.Restoring reliability.

From the first installation to a second life. Complete transformer, switchgear and substation support. Across India.

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Transformers · Switchgear · Substations Scroll to explore
20+
Years of team experience
100 MVA
Transformer service experience
Pan-India
Wherever your project takes us
Site+workshop
One team. Complete support.
About GridMax

Power expertise.Built on experience.

An engineering team with 20+ years of hands-on experience, supporting your critical power equipment.

GridMax Engineering Private Limited provides transformer manufacturing, electrical equipment servicing and substation engineering across India. We bring together field execution and workshop restoration to support the equipment your operations depend on. From a new installation to a major overhaul, our focus stays the same: reliable power, and a clear way forward.

Previously operating as Shree Sai Enterprises, we adopted the GridMax Engineering Private Limited name when the company was incorporated. Our team's 20+ years of industry experience includes work before incorporation.
  • Practical expertise
  • Complete lifecycle support
  • Pan-India execution
Discover our expertise
Transformer being transported for a GridMax service project
Substation switchyard equipment
Experience in every detail.
20+
Years of team experience
Our expertise

Complex equipment.Clear solutions.

You need your power equipment to work. We bring the expertise to make it happen — at every stage of its life.

01 Transformer service and manufacturing — technicians servicing a power transformer in the workshop

Transformer service & manufacturing

Manufacturing, installation, servicing and complete transformer restoration.

From new transformer manufacturing to major workshop overhaul, our team handles every stage of the equipment's life — erection, testing and commissioning on site, and complete rewinding, core and coil work when a unit needs to come apart. We've worked on units up to 100 MVA, backed by 20+ years of hands-on field and workshop experience.

Manufacturing Servicing Rewinding Overhauling
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02 ACB and VCB services — technician servicing an air circuit breaker in the workshop

ACB & VCB services

Air and vacuum circuit breaker servicing, overhauling, testing and commissioning.

A breaker that fails to trip — or trips when it shouldn't — is a real risk. We inspect, service and overhaul ACBs and VCBs down to the mechanism, checking contacts, springs and trip circuits, then verify everything with functional testing before signing off on commissioning.

ACB & VCB Inspection Overhauling Commissioning
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03 High-voltage insulator bushings — CT and PT restoration equipment

CT & PT restoration

Inspection, overhaul and restoration of current and potential transformers.

Instrument transformers are small, but a single faulty CT or PT can take protection or metering offline for an entire circuit. We inspect, dismantle, repair and reassemble these units with the same discipline as our larger transformer work, and every unit is fully tested before it goes back into service.

Condition assessment Restoration Testing
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04 Substation engineering — switchyard and transformer equipment on site

Substation engineering

Erection, installation, testing, commissioning and servicing of substation equipment.

Substation projects rarely involve just one type of equipment. Our field teams manage transformers, breakers, CTs, PTs and protection equipment as a single coordinated scope — from loading and erection through testing and commissioning — so you have one accountable team for the whole site.

Erection Testing Commissioning
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One partner. Every stage.

From site to workshop.And back to work.

A new project, routine care or an unexpected stop. We meet you where you are.

01
A new installation
02
Planned maintenance
03
A breakdown

Ready for the first switch-on.

Get your electrical equipment from delivery to dependable operation, with one team coordinating each stage.

01

Handle & position

Loading, unloading and careful equipment placement.

02

Install & connect

Erection and installation of equipment and associated systems.

03

Test & commission

Verification and commissioning before operation.

Reliability, on schedule.

Scheduled inspection and service to catch issues before they become downtime.

01

Inspect & assess

Condition assessment and diagnostic checks on critical equipment.

02

Service & adjust

Cleaning, lubrication, adjustment and corrective service.

03

Verify & report

Functional verification and a clear record of equipment condition.

Back to work, fast.

Rapid response to diagnose the fault and restore your equipment to safe, reliable operation.

01

Diagnose the fault

Investigation to identify the root cause of failure.

02

Repair or overhaul

Workshop or on-site repair, rewinding and restoration as required.

03

Test & recommission

Final testing and commissioning to return equipment to service.

High-voltage power transformer at substation
The work behind the power

From careful handling to dependable operation.

100MVA
Gujarat

Erection, testing & commissioning

Site erection, testing and commissioning of a 100 MVA power transformer, handed over ready for energisation.

100MVA
TADA, Andhra Pradesh

Complete overhaul & rewinding

Complete workshop overhaul of a 100 MVA transformer — full rewinding, insulation renewal and servicing, followed by complete testing.

25MVA
GridMax Workshop, Tamil Nadu

Complete workshop overhaul

Full in-house overhaul of a 25 MVA transformer — complete rewinding, insulation renewal and testing, carried out entirely at our own facility.

MVA measures transformer power capacity. Selected service experience shown.

Where we work

Behind the industries that move us forward.

Renewable energy
Wind & solar
Power generation
Power plants
Manufacturing
Large industrial facilities
Infrastructure & utilities
Electrical infrastructure
EPC & project contractors
Project execution support
Government & institutions
Institutional projects
Let's get to work

Your next project. Our full attention.

Tell us what you're working on. We'll help you find the right way forward.

Tell us what you need
Your point of contact

Sridhar Rajendran

Managing Director

+91 97904 83082

Also at +91 84388 53053

No. 135, Mudhugur Village, Ulundai Post,
Thiruvallur District, Tamil Nadu – 602 105, India

Based in Tamil Nadu. Working across India.