Cast Resin Dry-Type Transformer
1. Cast-Resin Encapsulated Windings: Vacuum-cast medium-voltage windings provide mechanical strength and resistance to moisture, dust and contamination.
2. Low-Maintenance Dry-Type Construction: No liquid dielectric reduces routine fluid maintenance and eliminates the risk of insulating-fluid leakage.
3. Flexible Cooling: Air-natural and forced-air cooling configurations are available based on the specified loading and temperature-rise requirements.
4. Project-Specific Enclosures and Accessories: Indoor and outdoor enclosures, temperature monitoring, fans and control panels can be engineered to the installation environment.
5. Standards-Based Designs: IEC, IEEE or UL configurations are available when specified and within the applicable design, manufacturing and certification scope.
Product Details
Cast-Resin Dry-Type Transformer
This transformer uses vacuum-cast resin medium-voltage windings and is designed for indoor or protected outdoor power-distribution applications where fire performance, low maintenance and environmental resistance are important. Typical applications include commercial buildings, industrial plants, data centers, renewable-energy facilities and infrastructure projects.
Typical Configuration Range
• Capacity: Project-specific ratings from distribution through medium-power applications
• Primary Voltage: Through the applicable medium-voltage class, typically up to 35 kV
• Secondary Voltage: Project-specific low- or medium-voltage ratings
• Frequency: 50 or 60 Hz
• Cooling: AN; AF ratings available when specified
• Winding Material: Copper or aluminum
• Insulation System: Project-specific thermal class
• Temperature Rise: Selected according to loading, insulation system and applicable standard
• Taps: De-energized tap changer configurations available
• Vector Group: Project-specific
• Enclosure: Open construction or indoor/outdoor enclosure options
• Installation: Indoor or protected outdoor, subject to enclosure and environmental design
Monitoring and Accessory Options
• Winding temperature sensors and digital temperature controller
• Forced-air cooling fans and automatic fan control
• Space heaters, lighting and auxiliary-power provisions
• Surge arresters and protective-device provisions
• Neutral grounding arrangements
• Electrostatic shield
• Vibration isolators, anti-condensation measures and enclosure filters
• Current transformers and metering provisions when required
Standards and Testing
IEC configurations may be engineered to IEC 60076-11. IEEE configurations may be engineered to IEEE C57.12.01 and tested using applicable IEEE C57.12.90 methods. UL 1562 configurations are available only when the specific product, construction and manufacturing location fall within the applicable certification scope.
Final kVA, voltage ratio, BIL, impedance, losses, sound level, temperature rise, dimensions, weight, enclosure rating and accessories are confirmed during technical review and documented on approved drawings and test reports.
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