Cast Resin Encapsulated Transformers
Cast Resin Transformers have at least one of the two windings embedded on an autoclave mould, at vacuum values ​​close to zero with epoxy resin. The other winding can also be cast in epoxy resin or impregnated with H class polyester resin with high cementation.
Cast Resin Transformers have reached a high degree of reliability thanks to the technological advances in recent years. Our production E2, C2, F1, but also E3 (IEC 60076-16) and C4 (GOST-R), can be used in the presence of a high humidity and pollution rate, low installation temperatures even down to -60°C, therefore eliminating the problems related to the risks of fire and emissions of toxic and harmful substances in case of fire.
As they are entirely built with insulating, flame retardant and self-extinguishing materials, they are completely free from all restrictions that should normally be applied to flammable equipment with a danger of spreading fire.
Applications
Specifications
| Power |
10kVA - 30MVA |
| Voltage Class |
1.1kV - 52kV |
| Material Temperature Classes |
F (155°C), H (180°C) |
| Environment Temperature |
-60 a + 60 |
| Winding Material |
Aluminium or Copper |
| Accessories |
Temperature control sensors, temperature control units, fans, boxes, anti-vibration devices |
| Strengths |
Reduced size, self-extinguishing, can withstand short circuit |
Vacuum Pressure Impregnated (VPI) Transformers
VPI transformers, a new construction concept, are suitable for installations that require particular attention to the environment, with minimum flammable material.
The windings up to 1.1kV class are made in foil or strip in a continuous layer; for higher voltages, the winding is made of disks connected in series or parallel according to the voltage or power of the winding.
The insulation can be used in class F or H and the impregnation is made with class H polyester resin
All production with air insulation has a small amount of flammable material, less of the resin solution and without any term of comparison with the oil solutions.
The transformer impregnated in air is not only suitable for distribution, but also for any type of special applications (such as the resin transformer). There are no particular limitations for the insulation levels, although generally it is not used for classes higher than 36 KV.
This type of transformers can be provided with a protective box, according to the desired IP. The boxes are painted with epoxy paint according to the RAL requested (RAL standard 7032) with pickled or galvanised sheet for outdoor installations.
Special applications for the outdoors include the creation of an aluminium box complete with MV ceramic bushing and LV resin insulators.
Applications
Specifications
| Power |
5 kVA - 30MVA |
| Voltage Class |
1.1kV - 36kV |
| Material Temperature Classes |
F (155°C), H (180°C) |
| Environmental Temperature |
-60 a + 60 |
| Winding Materials |
Aluminium or Copper |
| Accessories |
Temperature control sensors, temperature control units, fans, boxes, anti-vibration devices |
| Strengths |
Low energy content in the event of fire, reduced weight, excellent resistance to heat waves |
