Non-Ventilated Resin-Encapsulated Transformers | Elevate Power Distribution: Explore Premium Voltage Transformers | CIC

Non-Ventilated Resin-Encapsulated Transformers / Serving a diverse client base around the world, CIC is a leading manufacturer and supplier of current transformers, potential transformers (voltage transformers), distribution transformers, epoxy insulators, electronic meters, and other electrical and electronic products.

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Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation) | Enhance Safety and Performance with Superior Epoxy Insulators | CIC

Based in Taiwan since 1974, CHALLENGE INDUSTRIAL CO., LTD. specializes in manufacturing high-quality electrical products, including Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation), current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With over 45 years of expertise and technology collaboration with Germany's MWB, CIC is ISO certified and offers products recognized for reliability in various industrial applications.

Challenge Industrial Co., Ltd. (CIC) stands at the forefront of electrical innovation, specializing in the manufacturing of current transformers, voltage transformers, distribution transformers, epoxy insulators, and power capacitors. With a legacy built on over 45 years of engineering excellence and leveraging advanced German technology, CIC commits to delivering high-quality, ISO-certified electrical solutions. Their comprehensive product range, paired with an ISO-certified approach and a TAF-accredited laboratory, ensures reliability and performance for a diverse global market. CIC is your go-to source for electrical components that power progress and efficiency.

CIC has been offering customers high-capacity power capacitors since 1974, both with advanced technology and 50 years of experiences, CIC ensures each customer's demands are met.


Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation)

ET Series

Non-Ventilated Resin-Encapsulated Transformers (with H-Class insulation) are characterized by a reduced noise level compared to ordinary dry-type or cast-resin transformers. Compact and installable in a number of different ways, these transformers are furthermore self-extinguishing. With a durable IP20 enclosure, these transformers come in Regular Type and "Silent" Type, for the lowest sound levels. Optional accessories include protective devices for overload and over-temperature protection. SPD for protection against lightning is also available.


About the Product

In 1992, CIC became the first manufacturer in Taiwan to successfully produce a non-ventilated low-voltage transformer. To create this product, the main transformer components were placed in a metal enclosure and then insulated — encapsulated — with an epoxy resin mixture. The heat dissipation allowed by the solidified epoxy resin mixture and by the surface area of the metal enclosure made the compact size of the transformer possible. These transformers also had a reduced noise level — compared to ordinary dry-type or cast-resin transformers — and could be installed in a number of different ways, facilitating the economical use of space. The fire-resistant design further enabled these products to widely replace the oil-immersed transformers and tape-insulated dry-type
transformers that were frequently used in large buildings and shopping centers at the time. This non-ventilated LV transformer has since been enhanced with new features, including temperature monitoring and overload protection, and has become even more widely adopted. Ideal for commercial, office, medical, and residential buildings alike, these transformers are installed also in Taipei 101, Taiwan’s tallest building.


Product Features

  • Transformer cores made with high-permeability cold-rolled grain-oriented silicon steel sheets (CRGO) for high efficiency.
  • Windings are made with copper or aluminum conductors.
  • H-Class insulation for high safety and reliability.
  • Self-extinguishing, low-noise, and protected against moisture, dust, and pests.
  • Durable IP20 enclosure helps prevent electric shocks.
  • Compact size. Installable in multiple ways.
  • Available in Regular Type and “Silent” Type (for the lowest sound levels).
  • Optional SPD for protection against lightning.
  • Optional protective devices for overload and over-temperature protection.

Specifications

  • Standards: IEC (or specific national standards by request)
  • Number of Phases: 3 (single-phase products available upon request).
  • Frequency: 50 or 60Hz
  • Primary Voltage: ≤ 480V
  • Secondary Voltage: 190Y/110V or 208Y/120V
  • Connection Type: Δ–Y, or as specified by customers
  • Capacity: 3 ~ 75 kVA
  • Cooling Method: Air Natural (AN)
  • Other specifications or custom requirements available.

Drawings and Selection Tables

Non-Ventilated Resin-Encapsulated Transformers (H-Class Insulation) -- Drawings and Selection Tables


Overload and Over-Temperature Protection Devices (Optional)

Overload Protection Devices for Transformers

Note: For wiring diagrams, please refer to the full brochure of these protective devices, provided upon request.


Download Documents

Related Products
  • Low-Voltage Dry-Type Transformers
    Low-Voltage Dry-Type Transformers
    DTH Series

    LV Dry-Type Transformers, made with high-permeability cold-rolled grain-oriented silicon steel sheets (CRGO) and H-Class insulating materials, are self-extinguishing and characterized by excellent dissipation of heat, high efficiency, low noise, easy installation, and low maintenance.


  • Low-Voltage Oil-Immersed Transformers
    Low-Voltage Oil-Immersed Transformers
    LV Oil Transformer Series

    For high efficiency and safety, CIC’s low-voltage oil-immersed transformers are made with high-permeability silicon steel cores and insulating oil of a high ignition point.


  • LV Cast Resin Dry Type Transformers (CRT)
    LV Cast Resin Dry Type Transformers (CRT)

    Self-extinguishing low-voltage dry-type transformers, with coils cast in epoxy resin, for moisture-prone and polluted environments. Cores made with cold-rolled grain-oriented silicon steel sheets. Optional protective enclosures available for outdoor applications.



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