Dry type standard distribution transformers Eco design ecodesign SGB SANERGRID  EU 548-14 T154 PT100 T119 IP31 View larger

Standard dry-type distribution cast resin transformer TrafoELETTRO by SYNERDIS

Standard SYNERDIS encapsulated cast resin transfo rmers has been specifically designed to meet the needs of the distribution sector of the French electrical market. It combines a highly standardized design with an optimized production line automation.

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TrafoELETTRO standard range 24 kV single and dual voltage

distributed by SYNERDIS offers you a standardized range of dry-type transformers for electrical distribution from 160 to 2500 kVA, in 24kV insulation class; in step-down and step-up 20kV/0.41. ECODESIGN or ECO DESIGN tier 2 - Conformity with European standard EU 548-14 (reduced losses - 1 July 2021). The dry-type transformers do not contain any flammable dielectric oil and do not require a retention tank or a fireproof tank. They are widely used in industry, hospitals, tunnels, supermarkets and establishments receiving the public.


Many accessories are available, PT100, PTC, T119 relay, T154 relay or ZIHEL relay, SanerVib® anti-vibration silent block, IP31, IP 33 protection enclosures, plug-in terminals, fans, etc.

Advantages of the standard transformers range

The TrafoELETTRO dry-type distribution transformers distributed by SYNERDIS have the advantage of not using dielectric oil, they do not need a retention tank, nor a fireproof retention tank. Their special resin self-extinguishes the fire and requires little maintenance. This is why the TrafoELETTRO dry-type transformer is mainly used in public buildings such as hospitals, stadiums, schools, buildings, offices, factories, airports, train stations and other buildings. But also for electrical distribution needs where protection against fire risk is identified, such as data centers, tunnels, petrochemical sites, power plants, etc.

Our own test equipment
TrafoELETTRO dry-type transformers are designed and classified as C3*E2F1 and manufactured in series according to the IEC 60076-11 standard.

The tests defined in the standard for routine and type tests are carried out on our own modern test bench according to international standards:

- Individual routine tests

- But also special type tests:

Noise measurement
Certification of the climatic class - C2/C3/C4
Certification of environmental class - E2/E3/E4
- Special external tests:

Fire behavior test (destructive test) F1
Dynamic short-circuit test according to IEC and GOST
All our transformers of the SYNERDIS standard range are in compliance with the European standard ECODESIGN EU 548-14 on reduced loss levels from July 1st 2015 and July 2021 (ECODESIGN Tier 2) for transformers in the European Union.

For higher loss classes and export markets please contact us.

Ask us for a custom design for your specific needs.

Standard dry-type transformer configuration TrafoELETTRO by SYNERDIS Tier 2:

Primary voltage: 20kV, secondary voltage (no load): 410/230 V - unreduced neutral | ECODESIGN EU548-14 Tier 2 | classification C3*E2F1| frequency: 50 Hz | coupling: DYN 11 | short circuit voltage: 6 % | nominal insulation voltage: 24 kV | withstand voltage at 50 Hz for 1 minute : 50 kV | rated impulse withstand voltage : 95kV | natural cooling in ambient air (temperature at 40°C) | MV insulation asphalt/LV impregnated | thermal class F | de-energized setting on MV side +/- 2x2,5 per strip | HV connection on strips | LV connection on strips

Standard accessories included : 4 lifting rings, 4 adjustable rollers, thermal protection device by default : T-154 and 3 PT100 probes (or on request T119 with 6 PTC probes), earth terminal.

Transformer performance certified by factory test certificate.

All transformers in the standard TrafoELETTRO range distributed by SYNERDIS are guaranteed for 2 years after delivery.

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