Overview

Safe at the load center, maintenance-free for life

Safe and clean: flame-retardant, fireproof and pollution-free, dry-type transformers can be installed directly at the load center. They are maintenance-free, easy to install and have a low overall operating cost.

Excellent moisture resistance lets them operate at 100% humidity and be energized after shutdown without pre-drying. Low loss, low partial discharge, low noise and strong heat dissipation allow up to 150% rated load with forced-air cooling — and a complete temperature-protection control system keeps operation safe. Field-operation reliability is at the international level.

Three-phase cast-resin dry-type transformer
Configuration 01

Epoxy-Resin Cast (SCB 12–18)

Voltage classes 10 / 20 / 35 kV; off-circuit or on-load voltage regulation, including new-energy (PV/wind/storage) generation-side variants.

Dry-Type — Ratings (indicative)
35 kV power class2000–20000 kVA · HV 35 / 37 / 38.5 kV · impedance 7.0–9.5% · Dyn11 / Yyn0 / Yn11
20 kV distribution30–2500 kVA · LV 0.4 kV · impedance ~6%
10 kV distribution30–2500 kVA · LV 0.4 kV · impedance ~4–6%
Insulation / temperature classF or H (losses rated at 100°C(F) / 120°C(F) / 145°C(H))

Indicative ranges from the manufacturer's selection guide. Final ratings, taps, impedance and accessories are configured to your project specification.

Configuration 02

Amorphous-Alloy Dry (SC(B)H15 17–19)

An energy-saving dry-type transformer with an amorphous-alloy core — low no-load loss, oil-free, flame-retardant/self-extinguishing, moisture- and crack-resistant, and maintenance-free. The preferred choice for data centers and communication base stations.

Amorphous-Alloy Dry — Ratings
35 kV class1000–6300 kVA (three-phase double-winding)
10 kV class630–2500 kVA (three-phase double-winding)
Typical useHigh-rises, commercial centers, subways, airports, stations, industrial & mining, power plants
Amorphous-alloy cast-resin dry-type transformer
Also available: SG(B) non-encapsulated H-class (German MORA process; fireproof, waterproof and eco — for subways, ships, mines, chemical, power and densely-populated buildings) and the CSD Marine Transformer for ships and offshore platforms (−25 to +45 °C, 50–60 Hz, humidity ≤95%, salt-spray/mold/vibration; standard CB/T 1001-92).
Why this design

Engineered to last in the field

Flame-retardant & fireproof

Pollution-free construction installs directly at the load center.

Maintenance-free

Easy installation and a low overall operating cost.

100% humidity operation

Energize after shutdown without pre-drying — excellent moisture resistance.

150% overload (forced air)

Strong heat dissipation supports peak load with forced-air cooling.

Complete temperature protection

Integrated control system safeguards safe operation.

Amorphous-alloy option

Lowest no-load loss for data centers and communication sites.

Applications

Where these transformers fit

Data centersCommercial high-risesHospitalsAirports & transitIndustrial & miningRenewablesMarine & offshorePower plants

Need dry-type units for a US or Canadian project?

Send your kVA, voltages, taps and accessory schedule — we'll return an engineered quote with drawings and a DOE/CSA efficiency statement.