Product Details of 10kV SCB18 Epoxy Resin Cast Dry-Type Transformer

1. Product Overview

The 10kV SCB18 epoxy resin cast dry-type transformer is a top-level product that meets China’s National Level 1 Energy Efficiency (NX1) in the distribution field. It is developed in accordance with GB 20052-2020/2024 Limit Values and Energy Efficiency Levels of Power Transformers, representing the flagship upgraded version of the SCB series.

Based on the SCB14 (Level 2 energy efficiency), it achieves comprehensive improvements in energy efficiency, noise reduction and reliability.

It adopts 0.23mm ultra-thin high-permeability silicon steel sheets, multi-step stepped lap core technology and high-precision vacuum casting. Its core loss reaches the top level in the industry. It is oil-free, fireproof, explosion-proof and eco-friendly, fully complying with GB/T 1094.1-2013, GB/T 1094.3-2017 and other national standards.

As an ideal distribution equipment under the national “Dual Carbon” strategy, it is widely used in large data centers, high-end commercial complexes, new energy supporting facilities, precision manufacturing and other scenarios with extremely high requirements for efficiency, silence and reliability. It can be directly installed at the building load center and adapt to various harsh operating environments, realizing energy saving, consumption reduction, safe and stable operation throughout its life cycle.

2. Model Definition

• S: Three-phase transformer, suitable for industrial and civil three‑phase power distribution with high stability, capable of meeting large‑scale power demand.

• C: Epoxy resin cast insulation, using high heat‑resistant, high flame‑retardant and low‑loss epoxy resin via vacuum casting, providing high‑end insulation, moistureproof and dustproof performance.

• B: Foil winding structure made of high‑precision copper foil, featuring excellent conductivity, ultra‑low loss, high mechanical strength and outstanding short‑circuit withstand capability. Wire winding can be customized for special requirements.

• 18: Performance level code corresponding to National Level 1 Energy Efficiency (NX1) – the highest standard for dry-type transformers. Loss is greatly reduced compared with SCB14.

• Rated voltage: 10kV class (HV: 10kV, tap adjustable ±5%/±2×2.5%). LV default: 0.4kV. Custom voltages such as 11kV, 0.69kV, 1.14kV are available.

3. Core Product Advantages

• Top-level Energy Saving, Leader of Level 1 Efficiency (NX1)

  Fully compliant with GB 20052-2024 Level 1 energy efficiency (NX1), the highest efficiency grade for dry-type transformers.

  Compared with SCB14, no-load loss is reduced by 10%–18%, load loss optimized by 5%–8%.Taking a 2000kVA unit as an example, operating 8000h/year at 70% load rate, it saves an extra 800–1200 kWh per year compared with SCB14. Over a 30+ year life cycle, CO₂ emissions can be reduced by more than 100 tons.

• Ultra-low Noise, Excellent Environmental Friendliness

  Optimized stepped lap joint, low magnetostriction materials and improved clamping structure effectively suppress magnetic noise and vibration.

  Noise is 3–5 dB(A) lower than SCB14, controlled at 40–48 dB(A), close to indoor background noise. Ideal for hospitals, schools, high‑end offices and data centers.

• Upgraded Safety & Comprehensive Protection

  Oil-free and fully sealed structure with Class H high flame‑retardant epoxy resin, featuring strong flame and arc resistance. Passed third‑party fire resistance tests and can maintain critical power supply during fire accidents.

  Partial discharge < 5pC. Strong resistance to sudden short circuit and lightning impulse.No oil leakage, no toxic gas, no pollution. Can be installed in basements, floor distribution rooms without separate fire compartments.

• Harmonic & Weather Resistance for Complex Environments

  Foil winding has high mechanical strength and excellent short‑circuit withstand capability.

  Optional harmonic suppression winding or filter effectively offsets high‑frequency harmonics from PV, wind power and inverters, slowing insulation aging and extending service life.Excellent moisture, mildew, salt‑fog and pollution resistance. Operates stably at 100% relative humidity. No pre‑drying needed after long shutdown.

• Intelligent Interconnection, Maintenance-free Operation

  Equipped with high‑end intelligent temperature controller as standard: over‑temperature alarm, trip, fan auto‑control, fault pre‑warning.

  Standard RS485/Modbus interface. Supports optical fiber temperature measurement and IoT terminals, compatible with BA system, EMS and smart O&M platforms for remote monitoring, data collection and fault diagnosis, realizing unmanned operation.

• Long Service Life & Low Life-cycle Cost

  Class F insulation (standard), Class H optional. Excellent heat resistance and overload capacity.

  Epoxy fully sealed structure slows insulation aging. Service life ≥30 years under normal operation and regular inspection.Oil-free design enables maintenance‑free operation. All products pass national type tests.

4. Main Technical Parameters(Customizable)

5. Application Fields

• High-end civil buildings: LEED-certified malls, Grade A office buildings, 5-star hotels, residential quarters

• Key infrastructure: hospitals (ICU/operating rooms), schools, subways, airports, stadiums

• New energy: PV stations, wind farms, energy storage stations, charging station box transformers

• Precision industry: semiconductors, precision instruments, biomedicine, electronics plants

• High-end grid projects: urban grid renovation, high-end park distribution, old system upgrade

• Special scenarios: large data centers, supercomputing centers, compact indoor substations

6. Operation & Maintenance Instructions

• Installation: Good ventilation and sufficient heat dissipation space; ambient temperature ‑25℃ ~ +55℃; keep away from flammable/explosive materials.

• Pre-commissioning: Test insulation resistance, polarization index; check wiring, temperature controller, communication and grounding.

• Routine maintenance: Clean dust on windings at least once a year; check temperature controller, connections, grounding and communication.

• Shutdown & restart: Test insulation before reactivation after long shutdown; no drying needed. Check condensation in cold/humid weather.

• Fault handling: In case of over-temperature alarm/trip, check overload, ventilation or temperature controller first. Do not reset blindly. Only qualified personnel may perform maintenance.