Dry Type Transformers
Eltaş A.Ş manufactures cast resin dry type transformers upto 25 MVA and with maximum voltage rating of 36 kV. These transformers can be manufactured F or H temperature classes according to the customer requests and specifications.
We are proud of increasing the market share of domestic manufacturers in Turkey with the start of manufacturing in 2005.
Our company has both “cast resin with fiber glass under vacuum technology” and “cast resin with quartz technology” which are used in manufacturing. Both of this two technology are referenced through German tech and trouble free transformers are manufactured with the support of a Professional expert team.
The partial discharge parameter that specifies the transformer lifetime is <5 pC in our dry type transformers.
If dry type transformers compare with oil type transformers, minimising the fire risk in communal life places, not containing toxic chemicals inside that threats the human health in any kind of fire situation, being environmental friendly because of not changing oil and being exempt of oil leakages, taking up less place and maintenance free reasons are preferably.
Some of the areas that cast resin transformers are used;
- Indoor and Outdoor Transformer Centers
- Industrial and Oil Refineries
- Metros
- Oil Platforms
- Power Plants
- Schools
- Hospitals
- Airports
- Shopping Malls
- Wind Plants
- Minimisation of cable investment costs with placing the transformer nearby the load centers
- Lower sound level
- Non-flammable and self extinguishing
- Less area than oil immersed transformers for the same rating
- Maintenance free
- Moisture free coils
- No need for drying for re-operation after deactivation for a long period
- Coils can be changed on-site for any kind of reasons
- Rated power can be increased %40 by cooling fans
- Environmental friendly as it is not containing toxic chemicals inside
- Distribution Transformers
- Monophase Transformers
- Earthing Transformers
- Power Transformers
- Transformers with On Load Tap Changer
- Auto Transformers
- Generator Transformers
- Rectifier Transformers
- Transformers with Air Force-Water Force Cooling (for Ship application)
- Traction Transformers (for Subway application)
- Transformers with Seismic Apparatus
Our company serves for global market and manufactures according to the customer requests, current specifications and standards. If we sort some of these standards;
IEC 60076-11, NEMA ST 20, BS EN 50541-1, CSA C9-02, IEEE C57.12.01 , VDE 0532 / DIN 42523, TS 267 etc.
The high voltage windings (HV) are made of flat or round aluminium or copper wire with F or H Class insulation material. The HV windings are casted under vacuum to obtain voidless structure and cured slowly to have crackless coils. Due to Eltaş Cast Resin Transformers have very low Partial Discharge, they have very long life time.
Due to using additional cooling ducts in Eltaş Cast Resin Transformer’s HV windings technology, they have more affective cooling ability and strength advantage to HV pulses.
The core is made of highest quality, cold rolled grain oriented silicon steel. The cores are cutted and stacked with step-lap technology on fully automatic GEORG and TUBOLY machines. Lower no-load losses and sound levels are obtained with this method. The cores are protected against vibration and corrosion by resin coating and painting. The cores are grounded in accordence with required standards.
Two different technologies are used while performing casting operation.
- Quartz is used as a filler material in resin system.
Windings are manufactured with double-layer paper insulation systems by using aluminium or copper conductor tapes in Quartz – Based Technology.
- Fiberglass-reinforced resin technology (per customer request)
Fiberglass is used as a filler material.
Flat or round shaped aluminium/copper conductors can be used and with fiberglass reinforced resin, mechanical strength is unmatched.