TES-R — cast resin dry-type transformers up to 30 MVA, insulation class up to 52 kV
TES-R dry-type transformers with HV windings cast in epoxy compound are made with ratings up to 30 MVA and insulation class up to 52 kV. They are used in distribution networks and substations of buildings, hospitals, data centers, transport and industry.
- Rating
- up to 30 MVA (TES-R2 series: 100–2500 kVA)
- Insulation class
- up to 52 kV, BIL 250 kV (TES-R2: 17.5 kV)
- Classes to IEC 60076-11
- E3, C2, F1 (confirmed at CESI)
- Short-circuit voltage (TES-R2)
- 6 %
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Cast resin dry-type transformers have historically been the core product of the manufacturer. Its plant was among the first to start producing them, in 1983, and more than 20 000 units are installed around the world. The high-voltage windings are cast in epoxy compound, so the unit is fully protected against moisture, dust and industrial contamination. Fire hazard is low because the insulation is self-extinguishing. No maintenance is needed, and siting such a transformer is simpler than an oil-filled one. The main field of application covers distribution networks and substations of buildings.
The range reaches 30 MVA with insulation class up to 52 kV and BIL 250 kV. The transformers are certified to IEC 60076-11 and tested in CESI laboratories for compliance with classes E3 (operation in heavily polluted environments at humidity above 95 %), C2 (operation, transport and storage at temperatures down to −25 °C) and F1 (self-extinguishing in a fire). The proven casting technology gives a low partial discharge level and a long service life. The core and frames receive a special treatment for harsh environments, and a separate design is provided for seismic zones and installations with strong vibration.
The typical TES-R2 series (Tier 2 under EU Regulation 548/2014) at 17.5 kV covers 100–2500 kVA. No-load losses range from 250 to 2790 W, short-circuit losses at 120 °C from 1800 to 19 000 W, short-circuit voltage is 6 %, and no-load current is 0.6–0.2 %. The sound pressure level at 1 m lies within 43–58 dBA, and efficiency at full load and cos φ = 1 is from 97.99 to 99.14 %. The thermal class is F, the winding temperature rise is 100 °C, and the maximum ambient temperature is 40 °C. Examples of executions are TES-R 400 and 1600 kVA 10/0.4 kV, TES-R 1000 kVA 11/0.415 kV, and TES-R2 800–1000 kVA 15–20/0.4 kV with Dyn11 connection and ±2×2.5 % regulation.
The standard package includes PT100 sensors with a terminal box, including one in the LV winding, LV and HV terminals and HV tap links. Routine tests under IEC 60076-11 cover winding resistance, transformation ratio, vector group, dielectric strength, partial discharges, no-load losses and current, and short-circuit voltage and losses. Type tests are carried out for lightning impulse, temperature rise and noise level, and special tests for short-circuit withstand. The transformers are installed in public buildings, hospitals, data centers, transport, industry and PV plants.
Technical specifications
| Rating | up to 30 MVA (TES-R2 series: 100–2500 kVA) |
|---|---|
| Insulation class | up to 52 kV, BIL 250 kV (TES-R2: 17.5 kV) |
| Classes to IEC 60076-11 | E3, C2, F1 (confirmed at CESI) |
| Short-circuit voltage (TES-R2) | 6 % |
| Efficiency (TES-R2, cos φ=1, 100 %) | 97.99–99.14 % |
| Sound pressure level (1 m) | 43–58 dBA |
| Thermal class | F |
| Regulation | ±2×2.5 % |
| Vector group | Dyn11 (typical) |
| Standards | IEC/EN 60076, IEC 60076-11, Regulation (EU) 548/2014 Tier 2 |
Replacement for
ТСЛ-630/10, ТСЛ-1000/10, ТСЗЛ-1600/10, ТСЗГЛ-2500/10; ТСЗ-…/10; dry-type 20–35 kV — ТСЛ/ТСЗЛ (generic type); above 4000 kVA and above 35 kV — no direct serial analog
selected by purpose and main parameters, please confirm with our manager
Request a price and lead time
TES-R — cast resin dry-type transformers up to 30 MVA, insulation class up to 52 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What rating and insulation class do TES-R transformers have?
The range reaches 30 MVA with insulation class up to 52 kV and BIL 250 kV. The typical TES-R2 series at 17.5 kV covers 100–2500 kVA.
Which IEC 60076-11 classes do these transformers meet?
Class E3 for heavily polluted environments with humidity above 95 %, C2 for temperatures down to −25 °C and F1 for behavior in a fire. Compliance testing was carried out in CESI laboratories.
What losses and noise level does the TES-R2 series have?
No-load losses range from 250 to 2790 W, short-circuit losses at 120 °C from 1800 to 19 000 W. The sound pressure level at 1 m lies within 43–58 dBA.
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