SCB Series Epoxy Resin Cast Dry-Type Transformer

Product Overview

Main Product Lines

1. SCB Epoxy Resin Cast Dry-Type Transformer (Standard Model)

• Energy Efficiency: Full series from SCB11 to SCB18, compliant with GB Class 1, EU ErP Tier 2/Tier 3, and IEC IE2/IE3 energy efficiency standards
• Cooling Method: Natural Air Cooling (AN) / Forced Air Cooling (AF), with rated load capacity up to 150% under forced air cooling mode
• Insulation Class: Class F (155℃) / Class H (180℃) options for different temperature rise requirements

2. SG Non-Encapsulated Dry-Type Transformer (Special Industrial Model)

6 Core Technical Advantages

1. Intrinsic Fire Safety & Explosion Protection

• The oil-free insulation structure completely eliminates the risk of oil leakage, combustion and explosion. The epoxy resin itself has self-extinguishing and flame-retardant properties, meeting UL 94 V-0 flame retardant rating.
• No toxic or harmful gases are released during combustion, suitable for installation in densely populated areas and enclosed spaces, and compliant with the highest level of building fire safety codes.

2. High Energy Efficiency & Low Lifecycle Cost

• The iron core is made of high-permeability cold-rolled grain-oriented (CRGO) silicon steel sheets with a 45° full-inclined step-lap stacking process, which greatly reduces no-load loss and no-load current. The no-load loss of SCB13 and above series is more than 30% lower than that of traditional models.
• The low-voltage winding is wound with full-width oxygen-free copper foil, featuring high conductivity and low stray loss. The overall operation efficiency is ≥99%, meeting global first-class energy efficiency standards and significantly reducing long-term electricity costs.
• No maintenance procedures such as insulation oil replacement or oil filtration are required throughout the entire service life, and the comprehensive operation and maintenance cost is more than 60% lower than that of oil-immersed transformers.

3. Superior Mechanical Strength & Short-Circuit Resistance

• The winding is cured by vacuum epoxy resin casting and glass fiber reinforcement, with high mechanical strength of the overall structure. It can withstand sudden short-circuit current impact without deformation or damage, and its short-circuit fault tolerance far exceeds that of oil-immersed products.
• The thermal expansion coefficient of the winding is highly matched with that of copper conductors, with no insulation cracking or peeling under temperature cycles, and the insulation service life is more than 30 years.

4. Intelligent Temperature Control & Full-Time Operation Guarantee

• Equipped with standard PT100 temperature sensors to monitor the hot-spot temperature of three-phase windings in real time. The supporting intelligent temperature control system realizes three-level protection: automatic fan start/stop, over-temperature alarm, and over-high temperature trip.
• It supports RS485 communication interface and can be connected to building automation systems and power monitoring systems to realize remote status monitoring and centralized management, suitable for unattended distribution scenarios.

5. Strong Environmental Adaptability

• It has excellent moisture and dust resistance, operates stably in environments with 100% relative humidity and altitude below 2500 meters, and withstands conventional corrosive gases and dust environments.
• The operating ambient temperature ranges from -25℃ to 40℃, and specially customized models can adapt to extreme working conditions such as high cold and high altitude.

6. Low-Noise Operation for Sensitive Scenarios

• The iron core adopts step-lap joint process and high-strength insulating tape binding, and the winding adopts an integrated fastening structure, which effectively reduces magnetostriction vibration and operating noise.
• For models with a capacity of 2500kVA and below, the operating noise at a distance of 1 meter is ≤50dB, equivalent to the volume of daily indoor conversation, suitable for noise-sensitive scenarios such as hospitals, office buildings and residential areas.

Core Structure & Process Details

1. Iron Core System

   Made of high-grade CRGO silicon steel sheets with step-lap stacking technology, it minimizes no-load loss and excitation current. The core is tightly bound with insulating tapes to reduce vibration and noise during operation.

2. Epoxy Cast Winding

   High-purity copper conductors are wrapped with multi-layer insulation and cured by vacuum pressure casting with F/H grade epoxy resin. The fully encapsulated structure delivers excellent insulation performance, moisture resistance and mechanical rigidity, corresponding to the red cylindrical units in the product image.

3. Cooling System

   Cross-flow cooling fans are installed at the bottom of the windings (visible in the product image), supporting dual cooling modes of natural air cooling and forced air cooling. The fans start and stop automatically according to winding temperature to ensure stable operation under overload conditions.

4. High-Voltage Terminal & Insulation Bushing

   Red silicone rubber insulation bushings are arranged on the top of the unit, with excellent insulation performance and weather resistance, ensuring safe connection of high-voltage circuits.

5. Mounting Frame

   High-strength steel clamping frame with anti-corrosion coating provides stable structural support for the whole unit, compatible with standard floor installation and switchgear cabinet integration.

Technical Specifications Overview

Typical Applications

• Commercial & Public Facilities: Office buildings, shopping malls, hospitals, schools, residential complexes
• Data & Infrastructure: Data centers, server rooms, metro systems, airports, railway stations
• Industrial Manufacturing: Production plants, chemical parks, mining sites, metallurgical facilities
• New Energy & Power Systems: Photovoltaic power stations, wind power projects, distributed energy systems, industrial distribution rooms

Quality & Customization