35kV SC (B) Epoxy Resin Cast Dry‑Type Power Transformer

The SUT 35kV SC(B) epoxy resin cast dry type transformer is designed for medium-voltage power distribution systems requiring high electrical safety, low maintenance and reliable operation.

The series covers rated capacities from 800kVA to 25MVA, with a 35kV-class primary voltage and configurable secondary voltages including 3.15kV, 6kV, 6.3kV, 10kV, 10.5kV and 11kV. Voltage ratio, vector group, impedance and tapping arrangement can be configured according to the electrical system and project requirements.

High-voltage windings use vacuum-cast epoxy resin insulation, providing resistance to moisture, contamination and electrical stress. Partial discharge can be controlled to ≤10pC under specified test conditions, supporting stable insulation performance in medium-voltage applications.

An integrated temperature monitoring system continuously monitors winding temperature and can provide cooling fan control, over-temperature alarm and trip outputs. Natural-air and forced-air cooling configurations are available according to transformer rating and operating requirements.

SUT 35kV dry type transformers can be engineered for industrial facilities, substations, renewable energy projects, mining systems, commercial infrastructure and other medium-voltage distribution applications. Project-specific configurations are also available for demanding environmental and high-altitude operating conditions.

1. Safety & Reliable Insulation
   Triple‑layer insulation structure (conductor‑fiberglass reinforcement‑epoxy resin). Partial discharge ≤10 pC, 70 kV/1 min power frequency withstand voltage without flashover. Outstanding impulse‑withstand and short‑circuit resistance, stable dynamic and thermal performance under fault conditions.
2. Excellent Heat Dissipation & Overload Performance
   Optimized air duct design via thermal simulation. Hot‑spot temperature rise is well controlled. Under forced‑air cooling, short‑term overload operation is available.
3. Intelligent Temperature Protection System
   Integrated temperature detection unit cyclically displays three‑phase winding temperature. It automatically starts/stops cooling fans, provides over‑temperature alarm and trip signal output.
4. Custom‑Built For Harsh Working Conditions
   Optional harmonic‑suppression winding, on‑load tap‑changer and anti‑condensation heating device for special‑purpose projects. Fire‑resistant, pollution‑free, low maintenance, suitable for indoor high‑safety‑requirement locations.