Modern Standard & Retrofit Strategy

The 160 kVA Dry Type Transformer is engineered to meet the evolving demands of light industrial and commercial distribution. As international standards shift towards the R10 capacity series, this unit serves as the technical baseline for modern indoor power.

This unit functions as the direct IEC-standard successor to the legacy 150kva dry type transformer often found in older facilities. In retrofit scenarios, it solves the obsolescence issue by fitting into the same physical footprint while delivering an additional 6-7% ampacity buffer. This extra margin is critical for modern installations, allowing for the necessary "derating" when powering harmonic-rich LED lighting or IT loads without risking overheating.

VPI Technology: The "Open-Winding" Advantage

Unlike solid cast resin units, this is a specialized vpi type transformer (Vacuum Pressure Impregnated). The coils are vacuum-cycled with high-temperature polyester varnish rather than being potted in a mold. This process ensures the varnish penetrates deep into the winding interstitials, bonding the conductors into a rigid, vibration-resistant mass without adding thermal insulation bulk.

Airflow Dynamics: Unlike Cast Resin units where heat must travel through a thick epoxy layer, the VPI design exposes the winding insulation directly to the air stream. This "direct-cooling" architecture significantly reduces the winding gradient temperature, allowing the unit to recover faster from thermal spikes.
Compact & Lightweight: Without the heavy mass of epoxy resin, this unit is significantly lighter (often 15-20% less weight). This reduces structural loading on mezzanine floors or suspended platforms during installation.

160 kVA VPI transformer open-winding coil structure for superior

direct air cooling.

Technical Data Sheet

Technical Parameter	Specification Data
Rated Power	160 kVA (Replaces 150 kVA)
Insulation Technology	VPI (Vacuum Pressure Impregnated)
Insulation Class	Class H (180°C) or Class C (220°C)
Primary Voltage	Up to 11 kV
Secondary Voltage	400V / 415V
Cooling Method	AN (Air Natural)
Winding Material	Aluminum or Copper Foil
Fire Behavior	Self-extinguishing (Low fire load)
Standard	IEC 60076-11

Environmental Durability

While this is an open-ventilated dry transformer, the VPI varnish creates a tough, elastic coating over the windings. This protective layer is cured at high temperatures to ensure it is impervious to moisture, salt fog, and industrial dust. It provides excellent dielectric strength while allowing the coil to expand and contract thermally without the risk of cracking-a common concern with rigid cast systems in extreme temperature cycles.

Ideal Application Scenarios

The VPI design is particularly favored in sectors where weight and repairability are concerns:

Marine & Offshore: Due to its lighter weight and resistance to vibration (the varnish bonds the coil into a solid unit).
Commercial Retrofits: Replacing failed units in tight electrical rooms where moving heavy cast resin equipment is difficult.
Data Processing: Serving distinct server rows where Class H insulation allows for higher ambient operating temperatures.