Product Details of 35kV SCB10 Epoxy Resin Cast Dry-Type Transformer

I. Product Definition & Applicable Standards

The 35kV SCB10 epoxy resin cast dry-type transformer is an energy-saving power transformer developed in accordance with Type 10 low-loss standard. As an upgraded version of the SCB9 series, it achieves comprehensive improvements in loss control, insulation performance and operation stability.

Meanings of symbols in the model:

• S: Three-phase transformer, suitable for large-scale industrial and civil three-phase power distribution.

• C: Epoxy resin cast insulation, made of high flame-retardant, high heat-resistant epoxy resin via vacuum casting and curing.

• B: Foil winding structure with excellent conductivity and low loss.

• 10: Performance level code corresponding to Type 10 low-loss standard, with significantly optimized loss compared with SCB9.

This product complies with national and international standards:

GB/T 10228-2015, GB 1094.11-2013, IEC 60076 series.

Insulation class: Class F (155℃ max operating temperature).

It adopts fully sealed vacuum epoxy casting, oil-free, flame-retardant and explosion-proof, with no risk of oil leakage or pollution. It is an ideal substitute for traditional oil-immersed transformers in fire-safety, environmental and noise-sensitive places.

II. Key Technical Parameters(Customizable)

III. Structural Design Features

• Optimized Core

  Adopts high-quality cold-rolled high-permeability silicon steel (0.30–0.35mm), with 45° step-lap joints to reduce hysteresis and eddy current loss.

  Epoxy coating provides excellent moisture and rust resistance.Non-magnetic binding straps reduce vibration and noise.Noise is 3–5 dB(A) lower than SCB9.

• Upgraded Winding Technology

  HV winding: oxygen-free copper conductor.

  LV winding: high-precision copper foil.Vacuum epoxy casting with fiberglass reinforcement, high compactness, no bubbles or voids.Partial discharge ≤10pC.High mechanical strength and outstanding short-circuit withstand capability, no cracking or aging in long-term operation.

• Temperature Control & Monitoring

  Standard intelligent temperature controller with PT100 sensors: real-time temperature monitoring, over-temperature alarm, trip, automatic fan control.

  Optional RS485 / Modbus for SCADA and remote monitoring, supporting unmanned operation.

• Enclosure & Protection

  Cold-rolled steel enclosure with electrostatic spraying, corrosion-resistant.

  Ventilation louvers ensure good heat dissipation.Rain cover and protective net available.IP30/IP40 for dusty, humid or outdoor environments.Easy disassembly for maintenance.

• Terminals & Tap Changer

  High-quality copper HV terminals, low contact resistance.

  LV terminals adopt copper bars for easy wiring and expansion.Off-circuit tap changer for reliable voltage adjustment during shutdown.

IV. Core Performance Advantages (vs. SCB9)

• Better Energy Saving

  No-load loss 10%–15% lower; load loss 8%–12% lower than SCB9.

  For 1000kVA transformer (8000h/year, 70% load), it saves about 500–800 kWh/year compared with SCB9.Ideal for urban grid renovation and continuous heavy-load applications.

• Higher Safety & Reliability

  Oil-free structure eliminates fire, explosion and pollution risks.

  Flame retardance reaches FV0 level, self-extinguishing, no toxic gas.Can be installed directly in basements, hospitals, airports, industrial parks without oil pits or fire compartments.

• Stronger Weather & Pollution Resistance

  Fully sealed structure: moisture-proof, dust-proof, anti-condensation, anti-fouling.

  Stable operation under 100% humidity, coastal salt fog and heavy pollution.No pre-drying needed after long shutdown.

• Stable & Low Noise

  High mechanical strength, excellent resistance to short-circuit and lightning impulse.

  Low partial discharge, stable insulation.Noise: 50–60 dB(A), suitable for residential areas, schools, hospitals.

• Maintenance-Free & Long Service Life

  No oil change or refilling required; only regular dust cleaning and connection check.

  Class F insulation slows aging.Service life: 20–30 years under normal operation and inspection.

• Wider Adaptability

  Capacity: 30kVA–3150kVA.

  Customizable voltages, protection degrees and cooling modes.Suitable for indoor, outdoor, humid, dusty and coastal environments.

V. Typical Applications

• Power grid: 35kV substations, urban/rural grid upgrading, industrial & mining step-down stations

• Public buildings: commercial complexes, offices, hotels, subways, airports, hospitals, schools

• Special industry: chemical zones, coal mines, oil refineries, pharmaceuticals, coastal high-humidity areas

• Eco-sensitive areas: residential quarters, schools, ecological protection zones

• New energy: small and medium PV power stations, wind farm distribution stations

VI. Installation & Operation & Maintenance

• Installation

  Level concrete foundation with sufficient load capacity.

  Good ventilation required; air temperature difference ≤15℃.No installation in sealed space without ventilation.Correct tap position; tight terminals; reliable grounding (resistance ≤4Ω).

• Routine Maintenance

  Clean enclosure, vents and fan filters every 3 months.

  Check temperature controller, alarm and fan functions monthly.Inspect electrical connections and insulation every 6 months.No oil maintenance needed.

• Testing

  Pre-commissioning tests: insulation resistance, ratio, connection group, DC resistance, withstand voltage.

  Preventive tests every 5 years: insulation, dielectric loss, partial discharge.

• Fault Handling

  For over-temperature alarm: check load, ventilation and temperature controller.

  For tripping: eliminate short-circuit, overload or insulation fault before restart.Only qualified electricians allowed for maintenance.

• Storage & Transportation

  Store in dry, ventilated, clean warehouse.

  Test insulation every 3 months during storage.Fixed firmly during transportation; protect against collision, moisture and dust.

VII. Selection & Customization Suggestions

• Capacity

  Select at 70%–80% load rate, with 10%–20% margin for future load growth.

• Cooling Mode

  AN for indoor capacity ≤630kVA and stable load.

  AF for capacity >630kVA, large load fluctuation or high-temperature areas.

• Protection Degree

  IP20: clean indoor (office, hospital).

  IP30: dusty indoor (factory).IP40: outdoor, rainy or dusty environment.

• Optional Functions

  RS485 for remote monitoring.

  Cold-resistant structure and heating device for low-temperature environment.Anti-fouling winding for heavily polluted areas.