Cast Coil
Reliable, Durable, and Safe
MGM Transformers’ Cast Coil transformers are the ideal solution for environments where safety, reliability, and low maintenance are essential. Designed with a solid insulation system, these transformers are fire-resistant, moisture-resistant, and highly durable, making them perfect for indoor and harsh operating conditions.
With no liquid insulation, Cast Coil transformers eliminate the risk of leaks and reduce environmental impact. Their compact design and quiet operation make them a versatile choice for commercial, industrial, and renewable energy applications.
KEY BENEFITS
- Enhanced Safety: Fire-resistant design for peace of mind.
- Low Maintenance: Built for durability, reducing downtime and operating costs.
- Environmentally Friendly: No oil or fluid required, minimizing environmental risks.
- Custom Solutions: Tailored to meet your project’s unique needs.
Overview
- Constructed with primary and secondary cast resin, featuring epoxy and fiberglass encapsulated windings for durability and reliability.
- The low voltage (LV) coil uses highly-purified round-edge foil strip and insulating material pre-saturated in epoxy resin.
- Includes performance designs such as drive isolation and low inrush current configurations.
Standard Specifications
- Secondary Voltage up to 15kV, Primary Voltage up to 35 kV, and electrical ratings up to 7.5MVA.
- 50 / 60 Hz frequency.
- 80°C and 115°C temperature rise options.
- (180°C) Class H UL-listed insulation.
- UL and cUL listed.
Construction & Enclosure
- Copper or aluminum windings.
- Core is built from high-quality, grain-oriented electrical steel.
- Features an ANSI 61 gray powder-coated enclosure that supports multiple or custom bus configurations.
- Includes a de-energized tap changer.
Testing, Options & Accessories
- Optional protective coatings and enclosures available for marine, UV, and fungus-resistant environments.
- Cooling enhancements include forced air or water cooling.
- Setup options include pad-mounted setups, anti-vibration mounts, and sound attenuation.
- Electrical protection accessories include surge arresters, grounding resistors, ground fault relays, and electrostatic shielding.
- Controls and monitoring accessories include temperature relays, digital/IoT sensors, IR ports, and custom control panels.
Industry Use Cases
- Marine & Offshore
- Mining
- Heavy Industrial
- Transit
Product Literature
TECHNICAL SPECIFICATIONS
A Cast Coil Transformer uses coils encapsulated in epoxy resin for insulation and protection. This design enhances mechanical strength, moisture resistance, and electrical performance compared to traditional wound coils.
In a resin cast transformer, all windings are embedded in a solid resin mix. This limits movement and vibration, prevents moisture infiltration, and improves electrical insulation for safer, more reliable operations.
Cast coil transformers offer:
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- Excellent thermal performance
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- High moisture and dust resistance
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- Superior dielectric strength
- Reduced maintenance
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- Enhanced safety in demanding industrial environments
These transformers are ideal for industrial plants, offshore platforms, mining operations, power utilities, and any facility requiring high-durability transformers with robust insulation.
The epoxy resin encapsulating the coils provides high fire resistance. Because the insulation is solid, the risk of flammable liquid leaks is eliminated, making them suitable for strict safety environments.
Compared to oil-filled units, cast coil transformers require less maintenance, have no oil leak risks, and offer faster heat transfer due to solid insulation, making them more reliable for critical applications.
Yes. They can be tailored to specific voltage ratings, power levels, enclosure types, and environmental protection standards (IP ratings) to meet unique project requirements.
Maintenance is typically limited to visual inspections and periodic electrical testing. The resin encasement prevents moisture and corrosion, reducing the need for frequent servicing.
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