UNICLAD Transformers
COIL SEALING AND CLADDING
Each coil follows a carefully controlled, six-stage process to produce the desired level of protection. This proprietary process includes oven drying to remove moisture, vacuum-pressure impregnation with a flexible varnish, and coil end sealing with a resin mixture.
A final outer-cladding mixture of varnish, resin and silica is applied to the entire coil assembly to provide a final protective seal against the environment.

TRANSFORMER FEATURES
RANGE
- Up to 15 MVA
- 35 kV voltage class
- 150 kV BIL
LOADING
- Designed to deliver rated current and MVA in all tap positions
SERVICE
- Outdoor or Indoor
BASIC IMPULSE LEVEL (BIL)
- Per ANSI standard
COILS
- Aluminum or copper conductor
- Circular or rectangular construction
Impedance
- ANSI standard
PAINT
- ANSI 61 enamel on phosphatide cleansed surface
NAMEPLATE
- Metalized mylar
Other
- Provisions on base for lifting
- Jacking and skidding
- Stainless steel ground pads
OPTIONAL FEATURES
- Reconnectable windings
- Non-standard impedance
- Epoxy paint in your choice of color
- Fan cooling for increased MVA
- Available at 150ºC rise
- Outdoor, NEMA 3R enclosure
- TENV – For harsh environment
- Temperature Monitoring – Choose from coil windng temperature sensors and indicators, gauges or temperature controllers
- Terminations – Copper or aluminum bus with NEMA hole patterns and optional plating, flexible bus connection provisions also available
- Special flanged throats or custom air terminal chambers
UNICLAD BENEFITS
- Impressive 3-year warranty
- Circular design above 750 kVA
- Copper conductor - aluminum available
- 1150ºC rise - 800ºC rise optional
- 2200ºC insulation class
- Distribution class kV BIL ratings
- 15% overload capacity without fans at 115º rise
- Self-extinquishing internal and external arc
- Partial discharge free to 120%
- Water submersion 24 hours
- Thermal shock - no cracks
- Humidity 100% for 48 hours
- Vibration 1.5 Gs
- Shock 30 Gs
PRODUCT RANGE
- Dry Type 15 MVA, 35 kV
- Uniclad® (encapsulated coils) – 15 MVA, 35 kV
- Liquid Filled - 300 MVA, 230 kV
- LTC Transformers - 300 MVA, 230 kV
- Voltage Regulators - 3-phase, 46 kV
- Drive Isolation – 50 MVA, 138 kV
- Traction Duty – 50 MVA, 138 kV
- Air Core Reactor – 15 kV
SELECT CUSTOMERS



TYPICAL INDUSTRIES
- Paper Mill
- Transit
- Steel Mill
- Mining
- Hospital
- Computer Center
PRODUCTION TESTS
- Ratio
- Polarity
- Phase Relation
- No-Load Loss
- Excitation Current
- Impedance
- Load Loss
- Applied Voltage
- Induced Potentia
- Resistance