Substation & Main Power Transformers
Liquid-filled three-phase transformers for utility interconnection, renewable generation and industrial substations, built to order.
- Ratings
- 0.63–240 MVA; project-specific applications include 345 kV / 250 MVA.
- Primary
- 35 kV, 110 kV, 220 kV; other voltages against project requirements.
- Typical
- 35 kV 0.63–31.5 MVA; 110 kV 6.3–180 MVA; 220 kV 31.5–240 MVA.
- Options
- Two- or three-winding; off-circuit tap changing or OLTC; ONAN/ONAF; 50/60 Hz. Specific configuration confirmed for each project.
Three-phase pad-mount
Oil-immersed, outdoor pad-mount transformers in a tamper-resistant, padlockable enclosure.
- Ratings
- 45 kVA to 12 MVA.
- Primary
- 12.47 kV or 24.94 kV.
- Secondary
- 480 V, 600 V or 208 V, line-to-line.
- Options
- Live or dead front, radial or loop feed, Al or Cu windings, mineral oil or FR3 natural ester, ONAN or ONAN/ONAF with fans
Single-phase pole-mount
Oil-immersed single-phase transformers for overhead distribution, also available base-mounted for vault installations.
- Ratings
- Recent projects 167 kVA and 500 kVA. Other sizes on request.
- Primary
- 7.2 kV, 7.2/14.4 kV, 12.47/7.2 kV or 12.47/24.94 kV dual voltage
- Secondary
- 347 V, 347/600 V, 480 V
- Options
- Al or Cu windings, mineral oil or FR3 natural ester
Three-phase dry-type
VPI (vacuum pressure impregnated) or cast resin dry-type transformers for indoor installations, in a ventilated enclosure.
- Ratings
- Recent project 1,250 kVA. Other sizes on request.
- Primary
- Medium voltage, e.g. 6.6 kV Delta; other voltages on request
- Secondary
- e.g. 460Y/266 V; others on request
- Options
- Class H insulation, AN/AF with cooling fans, NEMA 1 enclosure, Al or Cu windings
