Authorized India Distributor
PRESA HF Drying & Forming Machine for Transformer Insulation
Dry and form pressboard insulation collars from 0.5 to 5 mm for power transformers, on a 27.12 MHz HF press at 30 to 50 kW. Built in Poland and supplied, installed and supported across India by Magnum Resources.
27.12 MHz
HF Frequency
30-50 kW
HF Power Output
0.5-5 mm
Pressboard Thickness
Poland
Country of Origin
16-20 weeks
Typical Lead Time
CE / ISO 17025
EMC Build Standard
Factory-Backed
Install & Training
Overview
About this machine
What the PRESA machine makes
The Zemat PRESA is not a fabric welder. It is a high frequency dielectric drying and forming machine for pressboard insulation used inside power transformers. It dries and shapes yoke collars and corner collars, for inner and outer circumference profiles, from cellulose pressboard between 0.5 and 5 mm thick. The HF field heats the wet board rapidly and evenly to above 100 degrees Celsius, evaporating the water from within while the press forms the part.
Engineers know this as a transformer insulation drying machine, a pressboard forming press, or an HF dielectric drying machine. The collars it produces adapt the insulation to the electric field inside the transformer.
How the HF drying and forming process works
The machine works with wet or dry pressboard (LD or HD) from 0.5 to 5 mm. Using electric field energy at 27.12 MHz, the board heats steadily through its full volume rather than from the surface in, which is what gives rapid dielectric evaporation of water without scorching. A single collar typically dries and forms in about 10 to 15 minutes depending on thickness and density. Custom aluminium dies cover collar radii from R300 to R2000 on a 1,300 by 800 mm press table.
Who the PRESA is built for in India
- Power transformer manufacturers: in-house production of insulation collars for transformer coils.
- Transformer insulation component suppliers: yoke and corner collars supplied to transformer makers.
- Power equipment and electrical OEMs: captive forming of high-purity, oil-impregnable insulation.
Why source the PRESA through Magnum Resources
Magnum Resources is the authorised India partner for Zemat Technology Group. We size the dies, press table and generator with the factory for your collar profiles, manage import and customs, and train your operators at start-up. Wear parts and technical support run through the same contact afterwards.
Manufacturer reference: Zemat PRESA high frequency drying and forming machine, official specification.
Built For
Who the PRESA is built for in India
A high frequency machine that dries and forms pressboard insulation collars for power transformers. Find your fit below.
Power Transformer Manufacturers
Dry and form yoke and corner insulation collars in-house for your own transformer coil production.
Transformer Insulation Component Suppliers
Supply formed pressboard collars to transformer makers, controlling profile, purity and delivery yourself.
Power Equipment & Electrical OEMs
Form high-purity, oil-impregnable pressboard insulation to your own specification for power equipment.
Specifications
Technical data
Specifications are supplied by the manufacturer. Custom configurations available. Speak to our engineers.
Request Full DatasheetHF System
Frequency
27.12 MHz
HF Power
30 kW to 50 kW
Heating
Volumetric dielectric heating (heats through the full board)
Press & Tooling
Drive
Hydraulic press with servomotor
Press Table
1,300 × 800 mm
Dies
Custom aluminium, collar radii R300 to R2000
Ergonomics
Pressing tools at a 45-degree angle
Material & Cycle
Material
Wet or dry cellulose pressboard (LD / HD)
Thickness
0.5 mm to 5 mm
Cycle
Approx. 10 to 15 minutes per collar
Output
Yoke and corner transformer insulation collars
Control & Safety
Control
Programmable drying and cooling cycles, multiple recipes
Safety
SICK safety controller, fully shielded HF area, two-hand or foot-switch
Compliance
CE; ISO 17025 EMC testing available
Return on Investment
What this machine saves you
The numbers Indian manufacturers use to justify the CAPEX internally.
27.12 MHz
Volumetric Drying
The HF field heats the pressboard evenly throughout, so collars dry fast without the scorching or deformation of oven drying.
Up to R2000
Collar Radius
Custom aluminium dies cover collar radii from R300 to R2000, so one machine forms a wide range of yoke and corner collars.
In-House
Insulation Forming
Form your own high-purity, oil-impregnable insulation collars instead of buying them in, controlling spec and supply.
Complete Package
What's included with every machine
From factory to running on your floor, Magnum handles it end to end.
The Machine
Factory-tested and EMC-checked at the Zemat plant before dispatch
Import & Customs
Sea freight and customs clearance to your site, handled by Magnum
Installation & Setup
Coordinated by Magnum with factory-backed engineers
Operator Training
On-site run-in and operator training at start-up
Factory-Supplied Dies & Spares
Aluminium dies and wear parts sourced to order from Zemat
Technical Support
Remote VPN diagnostics and factory-backed support after start-up
Buying Through Magnum
One accountable partner, end to end
Magnum Resources is the authorised India partner for Zemat Technology Group. We size the dies, press table and generator with the factory for your collar profiles, manage import and customs, install it on your floor and train your operators at start-up. Wear parts and technical support run through the same contact afterwards.
Authorised India Partner
A direct link to the Zemat factory for specification, tooling and engineering support.
One Point of Accountability
A single team for sourcing, import, customs, installation and training.
On-Site Installation & Training
Factory-backed engineers install the machine and train your operators in person.
Factory-Supplied Dies & Spares
Custom aluminium dies and wear parts sourced directly from Zemat.
Key Features
Engineering deep-dive
For maintenance teams and production engineers who want to look under the hood.
Forms insulation elements from 0.5 to 5 mm thick from wet or dry cellulose pressboard
27.12 MHz field heats the board evenly through its full volume, preventing overheating
30 to 50 kW HF generator sized to the work load
Hydraulic press with servomotor drive and pressing tools at a 45 degree ergonomic angle
Custom aluminium dies for collar radii from R300 to R2000 on a 1,300 by 800 mm table
Fully programmable drying and cooling cycles with multiple stored recipes
SICK safety controller with fully shielded HF area and two-hand or foot-switch operation
Watch It Run
See it in action
Real footage from installed sites and OEM demonstrations.
Documentation
Technical downloads
Brochures, datasheets and CAD files, available on request.
FAQs
Questions Indian buyers ask us
Real questions from our last 50 enquiries, answered upfront.
The PRESA dries and forms pressboard insulation collars for high-power transformers. It is a high frequency dielectric drying and forming machine, not a fabric welder. It shapes yoke and corner collars from cellulose pressboard 0.5 to 5 mm thick, heating the board evenly with a 27.12 MHz field while the press forms the part.
It works with wet or dry pressboard (LD or HD) from 0.5 to 5 mm thick. Custom aluminium dies cover collar radii from R300 to R2000 on a 1,300 by 800 mm press table, so it can produce a wide range of yoke and corner collar profiles, including large sizes.
Depending on the wet pressboard insert, its thickness and density, drying and forming a collar takes around 10 to 15 minutes. Because the HF field heats the board through its whole volume at once, the process is faster and gentler than conventional surface drying.
A conventional oven heats from the surface inward, which is slow and risks overheating and deformation. The PRESA heats the board evenly throughout with a 27.12 MHz field, so water evaporates rapidly and uniformly and the collar holds its formed shape, with the mechanical strength and purity needed for oil-filled transformers.
The buyers are power transformer manufacturers, transformer insulation component suppliers, and electrical equipment OEMs who want to form their own high-purity insulation collars rather than buy them in.
Typical lead time is around 16 to 20 weeks from the Zemat factory in Poland, including build, testing, sea freight and customs. Magnum manages import, customs, delivery, installation and operator training at start-up, with spares and support afterwards.
Engagement options
Evaluate PRESA HF Drying & Forming Machine for Transformer Insulation on your terms
Capex decisions deserve a serious conversation. Pick the channel that fits your stage, whether you're specifying, validating or still scoping. Each one routes to the right person on our team within one business day.
Request a Quotation
Configured pricing with lead time, installation, spares and AMC. Detailed proposal in one business day.
Application Engineer Call
30-minute technical review of throughput, substrate compatibility and integration with your existing line.
WhatsApp the Sales Desk
Fastest channel for spec sheets, brochures and quick clarifications. Replies during business hours.
Visit a Reference Installation
Tour a working line at a nearby Indian customer site. Coordinated subject to host approval.
Enquire
Talk to a Magnum specialist
Tell us about your production line and what you're trying to achieve. We'll come back within one business day with pricing, lead time and any technical questions answered.