Three Companies,
One Integrated Capability
From switchyard to switchgear — DEC, Trisquare, and POLYVION form India's most vertically integrated electrical infrastructure group.
Delhi Electric Company
The EPC flagship — delivering turnkey electrical projects, substations up to 220kV, and complete erection, testing & commissioning across India and internationally.
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Trisquare Switchgear Pvt. Ltd.
DEC's in-house MV/LV switchgear and control panel manufacturing arm — ensuring quality, speed, and full integration across every DEC project.
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POLYVION Cables & Wires
The cable and wire manufacturing division — producing a complete range of electrical cables and wires that power every DEC substation and EPC project.
Learn More60 Years of Engineering India's Industrial Future
Since 1964, Delhi Electric Company has been at the forefront of India's electrical infrastructure. We've evolved from a regional EPC contractor into a fully integrated engineering group — with in-house manufacturing of switchgear (Trisquare) and cables (POLYVION) that sets us apart from every competitor.
Our projects span 33kV–220kV substations, cogeneration plants, ethanol distilleries, and steel & cement plant electrification — across India, Kenya, Tanzania, Uganda, and the Philippines.
Our Core Services
View All ServicesTurnkey Substations
Engineering, Procurement and Construction of substations from 33kV up to 220kV with state-of-the-art protection relays.
Explore Turnkey SubstationsSwitchgear & MCC Panels
Design and manufacturing of MV/LV switchboards, intelligent motor control centers, and APFC panels.
Explore Switchgear & MCC PanelsPower & Control Cabling
Supply and laying of LT/HT cables, busducts, cable tray systems and outdoor switchyard conductors.
Explore Power & Control CablingTesting & Commissioning
Complete secondary injection testing, transformer oil testing, relay calibration and pre-commissioning checks.
Explore Testing & CommissioningInstrumentation & SCADA
Field instrument calibration, PLC programming, DCS integration, and plant-wide automation solutions.
Explore Instrumentation & SCADAErection & Installation
On-site installation of power transformers, circuit breakers, isolators, GIS equipment, and gantry structures.
Explore Erection & InstallationRetrofitting
Modernisation and upgradation of aging electrical infrastructure with minimal downtime.
Explore RetrofittingMaintenance & AMC
Annual maintenance contracts, breakdown support and preventive maintenance programs.
Explore Maintenance & AMCPowering Global Sectors
Cement & Heavy Ind.
Complete plant electrification for India's leading cement manufacturers.
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Steel & Metals
High-capacity substation and distribution for steel manufacturing complexes.
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Chemical & Process
Hazardous-area classified electrical systems for chemical and refinery plants.
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Distillery & Ethanol
330KLPD distillery expansions, ethanol plants with full electrical infrastructure.
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Sugar & Cogeneration
50+ sugar plant projects including Balrampur, Dalmia, Triveni & Bajaj.
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Tyre Industry
Robust electrical infrastructure tailored for high-demand tyre manufacturing facilities.
ExploreFuture-Proofing Industrial Power
At DEC, we merge decades of heavy industrial EPC expertise with modern, data-driven methodologies. Our intelligent electrical infrastructure designs are optimized for peak energy efficiency, smart grid integration, and seamless scalability. Partner with a forward-looking leader to empower your next mega-project.
Our Landmark Projects
View All ProjectsWest Kenya Sugar Company — 12MW Cogen
Complete 12MW bagasse cogeneration electrical infrastructure
Read Case StudyBalrampur Chini — 330 KLPD Distillery
Complete electrical package for 330 KLPD ethanol distillery expansion
Read Case StudyEpsilon Carbon — Substation, Bellary
33/11kV substation with complete MV/LV distribution
Read Case StudyIndia's Best Choose Us
60+ Years Experience
Established in 1964, we bring six decades of accumulated engineering wisdom to every project.
Engineering Excellence
In-house design, supply, and commissioning — single-source accountability from concept to handover.
Own Manufacturing
Trisquare switchgear + POLYVION cables — manufactured in-house, giving us a speed and quality edge no EPC-only competitor can match.
Global Presence
Active operations across India, Kenya, Tanzania, Uganda, and the Philippines — proven international delivery capability.
Certified Quality
ISO 9001, ISO 14001, ISO 45001 — rigorous quality, safety, and environmental management at every stage.
Fast Delivery
In-house manufacturing and integrated supply chain mean faster delivery without compromising quality.
After-Sales Support
Dedicated AMC, breakdown support, and maintenance teams ensure your plant keeps running.
Innovation Focus
From SCADA integration to automation retrofitting — we bring modern technology to industrial electrical infrastructure.
Engineering Without Borders
While rooted in India since 1964, DEC has successfully delivered complex EPC projects across multiple African nations, Southeast Asia, and the Subcontinent — proving that Indian engineering excellence stands up on the world stage.
Trusted by Leading Names Across Sugar, Cement & Industrial Manufacturing
What Our Clients Say
Quality You Can Verify
Latest Updates
View All NewsDEC Secures Major 12MW Cogen Project in Kenya
West Kenya Sugar Company awards DEC the complete electrical infrastructure package for their new 12MW bagasse cogeneration plant...
POLYVION Expands Cable Manufacturing Capacity
POLYVION Cables & Wires announces a 40% capacity expansion at their Kundli facility, enhancing DEC Group's in-house supply chain...
Trisquare Receives BIS Approval for LT Switchgear Range
Trisquare Switchgear Pvt. Ltd. has received Bureau of Indian Standards (BIS) approval for their complete LT switchgear and control panel range...
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Tell us your project type, capacity, location, and timeline. We'll respond within 24 hours with a preliminary assessment.