DRIVE & RECTIFIER TRANSFORMERS
Why Choose Virginia Transformer?
Virginia Transformer is the largest U.S.-owned transformer manufacturer in North America. Our made-in-America quality and design expertise are unmatched throughout the industry.
Drive & Rectifier Benefits
- Increased thermal margin for longer life
- Magnetically balanced winding designs
- Surge shields evenly distribute voltage surges
- Superior core construction handles high heat
- Lower insulation stresses better withstand surges
- Multiple vacuum pressure impregnation provides corona-free operation and increased strength
- Higher BIL ratings handle switching surges in pulse width-modulation
- Lower current density for high radial short circuit strength
TRANSFORMER FEATURES
Available in dry-type, liquid-filled or UNIclad® construction.
RANGE
- Dry-type up to 15 MVA
- 35 kV voltage class liquid-filled up to 100 MVA
- 230 kV voltage class UNIClad® up to 15 MVA
- 35 kV voltage class
COILS
- Aluminum or copper conductor
- Circular construction
- Continuous or helical disc
- Barrel (layer) wound
PAINT
- ANSI 61 enamel on sandblasted (Liquid filled)
- ANSI 61 enamel on phosphatized (Dry type, UNICLad®) surfaces
- Other colors available
GAUGES & ACCESSORIES
(Liquid Filled)
- Liquid temperature indicator
- Liquid level gauge
- Vacuum pressure gauge
- Drain valves
- Filter press connections (top and bottom)
- Automatic pressure relief device
- Control wiring in flexible conduit
- Other accessories available
SERVICE
- Indoor or outdoor
BASIC IMPULSE LEVEL (BIL)
- Per ANSI standard
IMPEDANCE
- ANSI standard
COOLING FLUID
(Liquid filled)
- Type II mineral oil
FLUID PRESSURE SYSTEM
(Liquid Filled)
- Sealed tank
COOLING RADIATORS
(Liquid Filled)
- Plate type
NAMEPLATE
- Stainless steel
- Engraved
BUSHINGS
(Liquid Filled)
- Cover or side mounted
OTHER
(Liquid Filled)
- Welded top cover
- 19" manhole covers
- Provisions on base for skidding
- Transformer lifting lugs
- Stainless steel ground pads
OPTIONAL FEATURES
- Reconnectable windings
- Non-standard impedance
- Epoxy paint in your choice of color
- Demountable radiators with isolation valves
- Galvanized radiators
- Terminal throats and chambers
- Sloping roof
- Multi-stage fan cooling for increased MVA
- Other gauges and accessories
- Shock indicator
- Customer-specific controls and relays
- Electronic temperature monitor
- Doors for easy maintenance access
- Fluid Preservation System – Inert gas (nitrogen) or conservator
- Circuits – 6 pulse, 12 pulse, 18 pulse, 24 pulse, 36 pulse
ADDITIONAL FEATURES AVAILABLE
- Rigid galvanized conduit wiring
- Provisions for parallel operation
- Potential transformer for voltage signal
- Loss-evaluated designs
- Stainless steel ground pads
RECTIFIER-DUTY TRANSFORMERS
- Size – Up to 17,000 kVA
- Current – Up to 10,000 amps
- Voltage – Up to 35 kV
- Circuits – Up to 16 pulse
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
SELECTED CUSTOMERS
- Alcoa
- PPG Industries
- Powell Electric
- Eaton Corp.
- Impulse NC, Inc.
- Long Island Railroad
- Consolidated Papers
- Georgia Pacific
- New York City Transit Authority
- GE Plastics
- Unocal Oil & Gas
- Reynolds Metals Co.
- Occidental Chemical Corporation
TYPICAL APPLICATIONS
- Steel rolling mills
- Oil and gas pumps
- Mining crushers
- Rapid transit
- Utility fans
- Industrial compressors
- Process lines
- Pulp and paper mills
- Cogeneration plants
- Cement plants
- Electrolytic depositions
PRODUCTION TESTS
Routine in-house tests per
ANSI C57.12.91 include:
- Ratio
- Polarity
- Phase Relation
- No-Load Loss
- Excitation Current
- Impedance
- Load Loss
- Applied Voltage
- Induced Potential
- Resistance
Witness testing is offered
and arranged according to
your schedule.
