Product Description

SGB series non-encapsulated dry type transformers are H-class open-winding power transformers designed for fireproof, explosion-proof and high-safety indoor power distribution scenarios. Adopting advanced VPI vacuum pressure impregnation technology and Nomex insulation materials, this non-resin cast dry transformer features low loss, ultra-low noise, strong overload capacity and zero cracking risk. Environmentally friendly, maintenance-free and fully IEC compliant, it is widely used for commercial buildings, data centers, subway, hospital and industrial indoor power supply projects.

With non-encapsulated winding structure, the transformer has no resin cracking, no partial discharge and no aging peeling problems that commonly occur in cast-type transformers. It features low operating noise, low loss and strong moisture and pollution resistance. The whole machine is fire-retardant, self-extinguishing and explosion-proof, releasing no harmful gas during operation. Adaptable to high humidity, high dust and densely populated indoor environments, SGB dry transformers are the preferred high-safety power distribution equipment for high-standard public and industrial construction projects worldwide.

Core Features

H-class High-temperature Resistance: Adopts premium Nomex insulating materials and H-class solvent-free impregnating varnish, with 180℃ high-temperature resistance, large overload margin and strong thermal stability.

No Cracking & Low Partial Discharge: Non-encapsulated open winding design, effectively eliminates resin cracking and peeling issues, extremely low partial discharge, long service life and stable performance.

Excellent Heat Dissipation: Natural air convection open structure, uniform heat dissipation, low temperature rise, supporting long-term full-load operation and short-time overload operation.

Fireproof & Explosion-proof: All insulating materials are flame-retardant and self-extinguishing, no combustion supporting, no harmful gas emission, meeting strict indoor fire safety standards.

Ultra-low Operating Noise: Optimized core stacking and winding damping design, operating noise as low as 40-50dB, suitable for hospitals, schools and urban core silent scenarios.

Strong Environmental Adaptability: Good moisture-proof, dust-proof and anti-pollution performance, adaptable to high humidity and dusty indoor working conditions, no insulation aging failure.

Maintenance-free & Easy Inspection: Open winding structure allows direct visual inspection of winding status, convenient daily maintenance, low operation and management cost.

International Standard Compliance: Manufactured strictly in accordance with IEC 60076 and GB/T 10228 standards, reliable quality and wide global applicability.

Details Table