PRECISION MANUFACTURING EXCELLENCE
IEC-compliant electrical insulation manufacturing — CNC machining centres, hydraulic press forming, composite fabrication & controlled drying chambers.
Manufacturing Infrastructure
ACC Insulations (Arunoday Composit Corporation) operates a dedicated precision manufacturing facility — engineered for high-performance transformer insulation components, dielectric composite materials, and CNC-machined electrical insulation parts for power, industrial, and renewable energy sectors.
Our infrastructure integrates advanced CNC machining centres, hydraulic press forming systems, composite material processing lines, and precision cutting equipment — enabling manufacture of insulation components conforming to IEC 60641, IEC 60893, IEC 60554 and IS standards.
Manufacturing Machinery Suite
Every machine is selected specifically for processing electrical insulation materials. Hover each card to discover capabilities. Click to see technical details.
CNC Machining
Centres
Precision cutting, drilling, boring and shaping of insulation materials — FRP sheets, glass fiber epoxy laminates, pressboard — with tight dimensional tolerances across high-volume OEM production runs.
Technical Capabilities
- Multi-axis precision cutting for FRP, G10/G11/FR4 laminates
- CNC programming for complex transformer insulation geometries
- Full repeatability across prototype to high-volume runs
- Tight dimensional tolerance — OEM drawing compliance
- IEC-grade dielectric integrity maintained through all operations
Hydraulic Press
Machines
Form, compress and consolidate composite insulation materials under uniform hydraulic pressure — producing pre-compressed pressboards with high mechanical strength and low void content.
Technical Capabilities
- High-density composite forming under uniform hydraulic pressure
- Pre-compressed pressboard consolidation for oil-immersed HV applications
- Low void content — superior dielectric breakdown voltage
- Long-term dimensional stability for transformer insulation systems
- IEC 60641 compliant pressboard production
Industrial Milling
Machines
Mill grooves, slots, profiles and custom contours in insulation boards, epoxy composite sheets, and transformer pressboard — spacers, wedges, phase barriers to exact engineering specs.
Technical Capabilities
- Groove and slot milling in insulation boards and epoxy sheets
- Custom contour profiles to OEM engineering drawings
- Spacers, wedges, cleats, phase barriers, angle collars
- Processes G10, G11, FR4, DLW, pressboard material grades
- Smooth finish — consistent dielectric surface integrity
Precision Cutting
Machines
High-accuracy cutting systems process insulation sheets — FRP, G10/G11/FR4 laminates, pressboard, DMD papers — into custom dimensions required by OEM transformer and switchgear manufacturers.
Technical Capabilities
- High-accuracy dimensioning for FRP, laminates, pressboard
- DMD paper, kraft paper, crepe paper custom cutting
- Smooth edge finishing — consistent dimensional accuracy
- OEM dimension-ready parts, every production run
- Material-specific tooling for insulation substrates
Composite Fabrication
Units
Dedicated fabrication units process FRP sheets, glass fiber reinforced laminates, and composite insulation materials into finished dielectric components for transformers, switchgear, and motor frames.
Technical Capabilities
- FRP sheet and glass fiber laminate fabrication
- Custom dimensions, profiles, and surface finishes
- Finished dielectric components for transformer assemblies
- Switchgear, motor frames, industrial electrical equipment
- IEC 60893 compliant composite dielectric parts
Drying & Seasoning
Chambers
Controlled-temperature seasoning chambers remove residual moisture — directly improving dielectric breakdown voltage and long-term insulation resistance for HV oil-immersed applications.
Technical Capabilities
- Controlled-temperature moisture extraction from insulation materials
- Improves dielectric breakdown voltage post-seasoning
- Long-term insulation resistance stabilisation
- Critical for oil-immersed HV transformer pressboard
- Pre-compressed boards and kraft paper conditioning
Our 6-Stage Manufacturing Process
Every component follows a structured multi-stage process — maintaining dimensional accuracy, dielectric integrity, and electrical performance from raw material to dispatch.
Electrical Insulation Materials
We Process & Fabricate
All materials sourced from authorised manufacturers and verified against IEC/IS grade specifications. We process a comprehensive range used across power transmission, switchgear, motor winding, and renewable energy applications.
FRP Sheets & Pultruded Profiles
Glass fiber reinforced polymer sheets & structural profiles for insulation frames and barriers
Glass Fiber Epoxy Laminates — G10, G11, FR4
High dielectric strength laminates for stator wedges, busbar supports, phase barriers
Transformer Pressboard & Pre-Compressed Boards
Cellulose pressboard cylinders, spacers, angle rings, barriers — IEC 60641 compliant
Electrical Kraft Paper & Crepe Paper
Cellulose insulation papers for turn-to-turn and layer-to-layer winding insulation
Diamond Dotted Paper (DDP)
Thermally bonded DDP for layer winding insulation in distribution and power transformers
Densified Laminated Wood (DLW)
High-strength DLW for transformer clamping rings, support frames and structural insulation
DMD Insulation Paper
Dacron-Mylar-Dacron composite for motor slot insulation and coil wrapping
Moulding Compounds & Engineering Plastics
Epoxy and polyester moulding compounds for cast insulation components and encapsulation
Custom OEM Insulation Assemblies
Fabricated insulation components and sub-assemblies to customer-supplied drawings and specs
Custom
CNC
Fabrication
ACC Insulations specialises in custom CNC machining of electrical insulation components based on OEM engineering drawings. Our multi-axis CNC centres process all major insulation grades with consistent dimensional tolerances and reliable dielectric performance.
Typical CNC-machined components include: angle rings, end collars, winding cylinders, phase barriers, busbar supports, stator wedges, spacers, cleats, insulation strips — all from OEM drawings.
IEC / IS
Standards
Quality control is implemented at every production stage — not just final inspection. Each batch is systematically verified against IEC and IS standards and industry-standard dielectric performance requirements.
- Incoming raw material inspection — grade, thickness, density, moisture
- Dimensional tolerance inspection against OEM drawing requirements
- Mechanical and structural integrity — flexural, compressive, tensile
- Dielectric strength and insulation resistance evaluation
- Moisture content verification post-seasoning chamber
- Batch documentation & test certificates available on request
Engineering Tools Suite
Material selection, insulation thickness calculators, thermal class compliance & dielectric clearance tools
Sectors We Manufacture For
Precision insulation components and composite materials supplied to OEM manufacturers and electrical infrastructure projects across India and internationally. View all industries →
Common Questions
Everything you need to know about our manufacturing capabilities, processes, quality standards, and OEM services.
Need Custom
Insulation Components?
ACC Insulations manufactures precision electrical insulation components tailored to transformer OEMs, switchgear manufacturers, and industrial equipment suppliers. Send us your technical drawings and our engineering team will provide a detailed, IEC-compliant quotation.
