Electrical Insulation
Manufacturer in India
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High-Performance Electrical Insulation & Transformer Components Manufacturer in India
Transformer & Composite Insulation Specialists — MIDC Ambad, Nashik, Maharashtra
ACC Insulations (Arunoday Composit Corporation), established in at MIDC Ambad, Nashik, is a trusted electrical insulation manufacturer supplying OEM transformer, switchgear, motor, and generator manufacturers across India for over 30 years.
We specialise in transformer pressboard, pre-compressed boards, electrical grade crepe paper, fibre glass epoxy sheets (G10/G11/FR4), glass fiber tubes, FRP pultruded profiles, densified laminated wood, and custom-machined composite insulation components — engineered for HT & LT applications across power, distribution, and industrial sectors.
Every product we manufacture meets IEC and IS standards — with full in-house dimensional inspection, dielectric strength testing, and batch certification before dispatch.
- State-of-the-art manufacturing facility in MIDC Ambad, Nashik
- Advanced CNC machining, hydraulic presses & precision fabrication
- IEC 60641, IEC 60554, IEC 60893 & IS standard compliance
- Custom components from OEM drawings — any profile, any tolerance
What We Manufacture
From raw cellulose insulation papers to precision CNC-machined composite components — every product in our range is engineered for long-term performance in demanding electrical environments.
Transformer Pressboard & Pre-Compressed Boards
High-density cellulose pressboard for transformer cylinders, spacers, angle rings and barriers. IEC 60641 compliant. Low residual moisture for reliable oil-paper insulation systems.
Explore Pressboard →Electrical Grade Crepe Paper & Tubes
Cellulose crepe paper with 10–30% stretchability for transformer lead wrapping, conductor insulation and coil assemblies. Oil impregnatable. IEC 60554 compliant.
Explore Crepe Paper →Electrical Grade Press Paper & Kraft Paper
Flat cellulose insulation paper for turn-to-turn and layer-to-layer winding insulation in power and distribution transformers. Multiple grades and thicknesses available.
Explore Press Paper →Glass Fiber Tubes & Epoxy Wound Tubes
Electrical grade glass fibre reinforced epoxy tubes for HV insulation, bushing cores, and structural spacers. High dielectric strength, temperature resistant.
Explore Glass Fiber Tubes →Fibre Glass Epoxy Sheets (G10, G11, FR4)
Precision CNC-machined glass epoxy laminate components — stator wedges, busbar supports, phase barriers, terminal boards and arc chutes. ±0.05 mm tolerance.
Explore Epoxy Sheets →Electrical Densified Laminated Wood (DLW)
High-strength densified laminated wood for transformer clamping rings, structural supports and insulation frames. Oil-compatible. Available in custom board sizes and beams.
Explore DLW →Comprehensive electrical insulation materials and transformer components — engineered for long-term reliability.
ACC Insulations is the single-source supplier for transformer OEMs needing pressboard, crepe paper, epoxy laminates, glass fibre tubes, and custom machined insulation parts — all under one roof, all IEC & IS compliant.
How We Work
From your drawing to your door — our process is built for OEM precision and reliability.
Enquiry & Spec Review
You share your drawing or standard spec. Our engineers review material grade, dimensions, and tolerances.
Material Selection
We select the correct IEC/IS grade raw material — pressboard, epoxy laminate, cellulose paper, or composite.
CNC Machining & Fabrication
Components are machined or formed on our CNC centres and hydraulic presses to your exact dimensional requirement.
Quality & Dispatch
Full dimensional, dielectric, and visual inspection before dispatch. Batch certificates supplied on request.
Smart Insulation Selection & Calculators
Our validated engineering tools help electrical engineers and transformer designers choose the correct insulation grade, calculate safe dielectric clearances, verify thermal class compliance, and convert units — all in one place.
- Material Finder: Match to IEC/IS grade by application parameters
- Thickness Calculator: Required insulation thickness from voltage & dielectric strength
- Weight Estimator: Logistics & structural mass calculation
- Thermal Audit: Class A–H thermal compliance check
- Unit Converter: Instant kV/mm to V/mil and more
Live Computational Preview
Input: 20 kV/mm Grade: Electrical Pressboard
Logic: val × 25.4
Result: 508.00 V/mil
// Minimum Insulation Thickness
T = (V_system / E_dielectric) × Safety_Factor
T = (33,000V / 22,500 V/mm) × 1.5
Result: 2.20 mm Required
Proprietary logic by ACC Insulations Engineering Team
Why Leading Transformer Manufacturers Choose ACC Insulations
Three decades of precision insulation manufacturing, deep material expertise, and transformer-focused engineering — all from a single, reliable source in India.
Established Since 1994
30+ years manufacturing electrical insulation materials for transformer, switchgear, motor, and generator OEMs across India.
CNC Precision Fabrication
Advanced CNC machining centres and hydraulic presses enable custom insulation components to your exact drawing and tolerance.
IEC & IS Standard Compliance
Every product manufactured to IEC 60641, IEC 60554, IEC 60893 and IS standards with dielectric and dimensional batch certification.
Single-Source Supplier
Pressboard, crepe paper, epoxy laminates, glass tubes, FRP profiles and machined components — all from one supplier, one quality system.
Reliable On-Time Delivery
Consistent lead times and production scheduling ensure your transformer assembly line never waits for insulation materials.
Technical Engineering Support
Our engineering team guides material selection, dielectric calculations, and dimensional specification for your specific voltage class and application.
Our Core Commitments
Expert Advice
Our engineers provide guidance on material selection, dielectric calculations, and insulation system design for every voltage class.
Advanced Technology
Modern CNC machining, hydraulic presses, and precision milling — operated by experienced engineers for consistent results.
On-Time Delivery
Committed to consistent dispatch schedules for transformer manufacturers — critical materials arrive when your assembly line needs them.
Quality Assurance
Dielectric strength testing, dimensional inspection, and moisture verification on every production batch — not just spot checks.
ACC Insulations supplies electrical insulation materials to manufacturers and utilities across eight major industrial sectors in India.
Frequently Asked Questions
Common questions from transformer and switchgear manufacturers about our products and capabilities.
Ready to Get Started?
Looking for Custom Machined Insulation Components?
Send us your technical specifications or OEM drawing and our engineering team will provide a precise, IEC-compliant insulation solution — pressboard, epoxy, glass fibre, or composite.
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Technical Specifications & Area Charts
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