Cast Resin Dry Type Transformer
The Cast Resin Dry Type Transformer (CRT) is a modern, eco-friendly transformer that provides safe and reliable power distribution without the use of oil or liquid insulation. Instead, it uses epoxy resin encapsulation to fully protect the windings from moisture, dust, and corrosion, ensuring long-term reliability and maintenance-free operation.
Designed to perform efficiently under extreme conditions — such as high humidity, fire-prone areas, and seismic zones — the CRT ensures superior electrical performance, environmental safety, and mechanical strength.
Product Details
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Features
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Specification
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Technology
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Cast Resin Encapsulation (Epoxy)
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Type
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Dry Type, Air-Cooled
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Rated Power
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25 kVA – 12,500 kVA (up to 40,000 kVA on request)
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Rated Voltage
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Up to 35 kV (Dual Voltage Optional)
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Frequency
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50 Hz / 60 Hz
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Phases
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Single / Three Phase
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Vector Groups
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Dyn11, Yyn0 or as per requirement
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Insulation Class
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Class F (155°C) or H (180°C)
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Voltage Taps
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±2 × 2.5% (Custom on request)
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Cooling Method
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AN (Air Natural) / AF (Air Forced)
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Warranty
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2 Years (Oil-cooled models) / 1 Year (Air-cooled models)
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Service Conditions
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Altitude ≤1000 m, Ambient ≤40°C
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Standards
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IEC 60076, IEC 60076-11, IS 11171, IEEE C57.12
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Key Features
- Epoxy Resin Encapsulation for total moisture, dust & corrosion protection
- Non-flammable & Self-Extinguishing design ensures maximum safety
- No Oil Required → No fire risk, no maintenance, no oil pits
- Low Noise Operation with vibration-resistant structure
- Excellent Short Circuit Strength & Mechanical Durability
- High Thermal Endurance – Handles overloads with ease
Quality & Testing
- 100% Designed and Built in India
- European Eco-Design (EN 50541-1 Compliant)
- Certified for Fire Safety & Environmental Standards
- Supplied with Factory Test Reports & Quality Certificates
Applications
- Environmentally Sensitive Areas – Water treatment plants, forests, wetlands
- Fire-Risk Zones – Hospitals, schools, hotels, shopping malls, underground substations
- Renewable Energy Systems – Wind, solar, and hydroelectric installations
- Industrial Facilities – Process industries, data centers, CNC operations, marine and mining systems
- Urban Installations – Building management systems, commercial complexes, airports, metros
Three Phase Air-Cooled Servo Voltage Stabilizer
Beta Power Controls in India?
17+ Years of Expertise
Industry Leadership & Innovation
Global Quality Certifications
ISO 9001:2015 compliant
Customization
Voltage ranges and models tailored to client needs
High Efficiency
98% energy efficiency, reduces power loss
Global Export Network
Strong presence in Middle East, Europe, Africa & Asia
After-Sales Support
Installation, service, and technical assistance
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Frequently Asked Questions
A CRT is a transformer whose windings are encapsulated in epoxy resin instead of being immersed in oil, making it non-flammable, moisture-proof, and maintenance-free.
They are suitable for indoor, high humidity, or fire-risk environments such as hospitals, data centers, malls, and industrial plants.
CRTs do not use oil, eliminating fire and spill risks. They are safer, eco-friendly, and require minimal civil protection.
It ensures full insulation, prevents moisture ingress, resists pollution and vibration, and allows for compact, efficient designs.
Practically none — CRTs are maintenance-free due to their sealed and self-extinguishing insulation.
Typically Class F (90°C temperature rise) or Class H, depending on design.