SCB18-LT Ultra Low Temperature Resistant Dry Type Transformer
Scope of Application
Plateau Wind & PV Base
Adapt to high-altitude cold mountain new energy stations with long-term sub-zero ambient temperature.
Northern Cold Region Power Grid
Suitable for towns, residential districts and rural power renovation in severe cold northern areas.
Frigid Zone Mining & Industrial Park
Stable power supply for open-pit mines, chemical factories operating all year round under freezing climate.
Product Description
-
1 - Special low-temperature modified epoxy resin casting, no brittle cracking under extreme cold thermal shock.
-
2 - H-grade Nomex composite insulation system, insulation resistance keeps stable at -40℃ ultra-low temperature.
-
3 - Full copper foil winding with elastic buffer structure to offset cold shrinkage expansion stress.
-
4 - Built-in anti-freeze heating strip + intelligent temperature controller to prevent dew and frost inside cabinet.
-
5 - Low-loss step-lap silicon steel core, less magnetostriction vibration in low temperature environment.
-
6 - Dual cooling mode AN natural air cooling / AF forced air cooling for winter low-load & summer overload.
description1
description2
Low-Temperature Anti-Crack Resin Casting
Modified epoxy avoids brittle crack under rapid temperature drop in frigid areas.
H-Grade Cold-Resistant Composite Insulation
Nomex compound material maintains high insulation performance at minus 40℃.
Elastic Stress Relief Winding Structure
Optimized high voltage electric field to resist lightning surge in mountain power stations.
Built-In Anti-Freeze Heating System
Automatic heating removes cabinet frost, eliminate hidden danger of internal condensation.
Low Vibration Cold-Adapted Core
Optimized core clamping reduces low-temperature vibration and running noise.
Zero Oil Flame Retardant Safe Design
Self-extinguishing solid insulation, no leakage risk for indoor cold-area substation rooms.
Main parameters
Rated Voltage & Capacity: HV:10kV/20kV/35kV; LV:0.4kV; capacity range 100kVA–25000kVA customized
Ultra-Low Temperature Operation Index: Stable operating range: -40℃ ~ +50℃; storage limit -50℃, no insulation cracking
Insulation & Cooling Mode: Insulation Class H (180℃); AN natural air cooling, AF forced air cooling optional
Connection Group & Protection: Standard Dyn11; built-in PT100 temperature sensor, anti-freeze heating linkage protection
Execution standards
Technical advantages
This transformer utilizes a proprietary cold-resistant modified resin material. Following rapid thermal shock testing across a range of -40°C to +50°C, the cast coil assemblies showed no signs of cracking, delamination, or bubble formation. Combined with imported Nomex insulation paper, the unit maintains stable insulation resistance even during long-term operation in extreme cold, effectively resolving the insulation failure issues commonly encountered by traditional dry-type transformers in cold northern regions. The equipment is also equipped with an automatic anti-freeze heating system and a dual-channel temperature monitoring module: the heating system activates automatically when the internal cabinet temperature drops below 0°C to prevent frost and condensation, while cooling fans engage automatically if the windings overheat. This dual functionality addresses both winter freeze protection and summer heat dissipation needs, significantly reducing the frequency of manual maintenance required for substations in remote, high-altitude, and cold regions. We tailor specifications—including core clamping force, winding cushioning structures, and cabinet anti-freeze coating solutions—based on the extreme minimum temperatures at the project site. Each unit undergoes low-temperature cyclic aging tests before leaving the factory and holds export certifications such as CE and ISO. These transformers are widely used in wind and solar power plants in cold regions, northern mining areas, and county-level grid renovation projects, ensuring long-term, stable operation under harsh climatic conditions.