SETTING POWER
IN MOTION

Powering Industries

Eastern India's largest transformer manufacturer. 65+ years of engineering trust. From 10 KVA to 300 MVA — built for utilities, railways, industry, and renewable energy.

Certified ProductsCertified Products

Our Transformers of various ratings, which includes 50 MVA 132 kV class, have been successfully type-tested at CPRI in Bhopal and Bangalore.

Trusted ExpertiseTrusted Expertise

We have supplied more than 300,000 Transformers of different voltage and MVA across the globe over last 6 decades.

Certified ExcellenceCertified Excellence

Our fully equipped laboratory can efficiently carry out all required routine tests, for various ratings of Power Transformers up to the range of 10 KVA to 300 MVA class.

ResponsiveResponsive

We have evolved over the years by introducing new range of products catering to the latest developments and requirements in the market.

OUR GOALS

To manufacture and supply trouble-free products in conformance to specification for the satisfaction of our customers. We commit to increase productivity and continuously improve systems — ensuring timely delivery at competitive prices, in compliance with health, safety, and environmental requirements.

VISION

To establish Marsons as a global brand and one of the most trusted names in transformers.

VISION
MISSION

Through quality assurance and stringent evaluations, provide customers with quality products at affordable prices and consistency in service. Develop and maintain supplier–customer relationships based on open communication, mutual trust, and respect.

MISSION

OUR PRODUCTS

Distribution Transformers
Distribution Transformers• 10 KVA – 2,500 KVA | Up to 33 kV | IS 1180

For state utilities, DISCOMs, and industrial facilities. BIS Star Rated (Level 1–3). Hermetically sealed, conservator, and free-breathing variants.

Power Transformers
Power Transformers• Up to 300 MVA | Up to 345 kV | IS 2026 / IEEE C57

The only EHV transformer manufacturer in Eastern India. Serving India's 220 kV / 400 kV grid and US transmission networks at 69–345 kV.

Furnace Duty Transformers
Furnace Duty Transformers• EAF & LF Type | Electrode current up to 50 kA

Purpose-built for electric arc furnaces and ladle furnaces. Designed for continuous repetitive short-circuit events.

Locomotive & Traction
Locomotive & Traction• WAG9 / WAP5 / WAP7 | 25 kV AC | RDSO

Critical front-end transformers for Indian Railways' electric locomotive fleet.

Dry Type Transformers
Dry Type Transformers• Up to 20 MVA | Up to 33 kV | IS 11171

Oil-free, fire-safe units for hospitals, metro tunnels, data centres, and high-rise buildings.

WTG Transformers - Marsons Green
WTG Transformers - Marsons Green• 1 MVA – 6.3 MVA | IEC 60076-16

India's full onshore wind fleet. Handles thermal cycling, VCB surges, and harmonics.

Inverter Duty Transformers - Marsons Green
Inverter Duty Transformers - Marsons Green• 1 MVA – 6.3 MVA | IEC 60076-16

For utility-scale solar PV, BESS, and VFD. Foil windings, unity power factor sizing.

US Market Transformers
US Market Transformers• Up to 300 MVA / 345 kV | IEEE / ANSI / DOE

Pad-mounted, substation, GSU, solar/BESS, wind collector, and specialty transformers. PE-stamped all 50 states.

WHY MARSONS
Only EHV Manufacturer in Eastern India
Only EHV Manufacturer in Eastern India

No other transformer manufacturer in Eastern India — including the North Eastern Region — produces Extra-High Voltage transformers. We have commissioned nearly 200 EHV units across India's most demanding grid projects, with units impulse-tested at 150 MVA 220 kV class at our own NABL accredited laboratory.

Built to Two International Standards
Built to Two International Standards

We engineer to IS/IEC for India's grid and IEEE/ANSI for the United States — from the same factory, the same quality system, the same people. 132 kV class units certified and exported to European markets.

NABL Accredited Test Laboratory
NABL Accredited Test Laboratory

Our in-house laboratory is equipped with a Haefely Trench impulse test system from Switzerland — rated at 1,600 kV / 80 kJ. We test transformers up to 200 MVA 220 kV class without sending units to a third-party facility. Full test reports provided with every unit.

65 Years Without Compromise
65 Years Without Compromise

Founded in the late 1950s, Marsons has shipped over 300,000 transformers. Customers in steel plants, railways, chemical plants, and EHV substations have trusted Marsons repeatedly for over six decades.

12,000 MVA Annual Capacity
12,000 MVA Annual Capacity

Eastern India's largest transformer facility — 45,000 sq.m., dust-free winding and assembly, epoxy-coated flooring, and a vacuum drying system that cuts drying time by more than 50%.

India's Renewable Energy Partner
India's Renewable Energy Partner

Our Marsons Green product line covers every onshore wind turbine class in India from 1.5 MW to 6.3 MW, and every solar plant scale from rooftop to 500 MW utility parks.

Only EHV Manufacturer in Eastern India

No other transformer manufacturer in Eastern India — including the North Eastern Region — produces Extra-High Voltage transformers. Nearly 200 EHV units commissioned across India's most demanding grid projects. 150 MVA 220 kV class impulse-tested at our own NABL accredited laboratory.

~200

EHV Units Commissioned

1,600 kV

Haefely Trench Lab

220 kV

Current EHV Capability

400 kV

315 MVA — In Pipeline

ISO 9001:2008

Quality Management System — DNV Certified

NABL Accreditation

Electrical Testing — Power Transformers up to 200 MVA 220 kV

BIS Approval

Type tested energy efficient transformers — Level 1, 2, 3

CPRI Type Tested

Up to 160 MVA 220 kV Class & 17.6 MVA IDT Dynamic SC

CE Certified

Conformité Européenne — Export to Europe

IEEE C57 Series

US Standards — IEEE / ANSI / DOE / NERC / FERC

ISO 14001 & 45001

Environmental & Occupational Safety — DNV Certified

DSIR Certified R&D

Dept. of Scientific & Industrial Research, Govt. of India

Built in Kolkata,
Trusted Worldwide
India — IS / IEC Standards

The only EHV transformer manufacturer in Eastern India including the NER. Serving 16 state electricity boards, Indian Railways, steel industry, and India's 500 GW renewable energy target.

33 kV

66 kV

132 kV

220 kV

400 kV (pipeline)

24×7 Service

United States — IEEE / ANSI

Serving US utilities, renewable energy developers, and industrial customers with substation, GSU, pad-mounted, and specialty transformers. PE-stamped for all 50 states. NERC/FERC compliant.

69 kV

115 kV

138 kV

230 kV

345 kV

DOE 2016

United Kingdom & Europe

132 kV class — CE certified

Africa & Middle East

Distribution & HV transformers

Bangladesh

Distribution transformers

LATEST BLOGS & ARTICLES
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Powering Up New Insights

We are currently putting the finishing touches on our new knowledge hub. Check back soon for the latest industry news, technical guides, and updates on the future of power distribution and green energy.

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