Air-cooled three-phase dry-type transformers from 0.5 to 300 kVA, ≤500 V, 50/60 Hz. Open-type or enclosed designs for voltage conversion, isolation and distribution in industry, buildings and transit.
The SG series is a range of air-cooled, oil-free three-phase dry-type transformers rated from 0.5 kVA to 300 kVA at voltages up to 500 V. Designed for 50 Hz and 60 Hz networks, it provides step-up / step-down voltage conversion and galvanic isolation for industrial machinery, building services and infrastructure power systems.
Available in open-type (IP00) and protected enclosed designs, the SG series is used wherever oil-filled units are impractical — underground metro stations, airport terminals, high-rise plant rooms and production floors. Input and output voltages are built to order, so a single series covers both local grid matching and export machinery requirements.
Applications
Imported & exported machinery — Match 400 V / 415 V equipment to a 380 V or 480 V supply, or provide a clean isolated secondary for sensitive CNC, printing and packaging lines.
Industrial control & automation — Isolation transformer for PLC cabinets, drives and instrumentation; reduces common-mode noise and protects against earth faults.
Commercial buildings & data rooms — Step-down and isolation for HVAC plant, lifts, lighting distribution and UPS input.
Rail transit & metro — Auxiliary power, signalling and station services. Dry-type construction means no oil, no oil pit and no fire-rated transformer room in enclosed underground spaces.
Airports & transport hubs — Continuous-duty power conversion for terminal systems where downtime is not an option.
Key Features
0.5–300 kVA in one series — from single-machine isolation to whole-floor distribution, one specification covers your entire project schedule.
Dual 50/60 Hz design — one model serves both domestic projects and 60 Hz export markets, reducing stock and documentation overhead.
Dry-type, oil-free — no oil containment, no fire-rated room, lower civil cost and simplified maintenance.
Voltage conversion and isolation in one unit — step-up, step-down or 1:1 isolating configuration, built to your input/output voltage.
Open-type or enclosed enclosure — choose IP00 open frame for ventilated electrical rooms, or a protected enclosure for dusty plant floors and public areas.
Custom-built voltages — any standard or non-standard primary/secondary combination within the 500 V class.
