Howard Industries liquid-filled substation transformers are designed for a wide range of commercial, industrial and utility applications. They are an ideal choice for manufacturing facilities, chemical plants, refineries, office buildings, schools, hospitals, restaurants, banks, Internet service facilities, and shopping centers. As a result of our exceptionally high standards for desing and manufacturing, our customers can be assured of substation transformer products that meet the most exacting requirements for safety, reliability, functionality, and economy. Four basic substation configurations are available. Primary open substations have cover mounted high-voltage and low-voltage bushings and have low-voltage ratings above 1.0 kV. Secondary open substations have cover mounted high-voltage and lowvoltage bushings and have low-voltage ratings of 1.0 kV or less. Primary unit substations have sidewall mounted high-voltage or low-voltage bushings (or both), have low-voltage ratings above 1.0 kV, and can be supplied with mounting provisions for mechanical and electrical interconnection with high-voltage and low-voltage switchgear. Secondary unit substations have sidewall mounted high-voltage or lowvoltage bushings (or both), have low-voltage ratings of 1.0 kV or less, and can be supplied with mounting provisions for mechanical and electrical interconnection with high-voltage and low-voltage switchgear. All of these substation configurations can be designed for indoor or outdoor use. Our experienced design team can provide customized designs for new applications or for jobs requiring replacement of existing transformer equipment. A wide range of features and accessories are available to satisfy almost any requirement.
Howard Industries manufactures a complete line of transformers, all designed with increased margins of safety and reliability.
Contact your distributor or factory representative for availability of other
kVA sizes, voltage ratings, features, accessories and design standards not listed.
Talk to us about filling a custom order that best fits your needs.
(Some high-voltage and kVA combinations are not available. Units with high-voltage ratings of 34400 and higher must have cover-mounted high-voltage bushings. Contact factory for details.)
Low-Voltage Ratings (Delta or Wye):
120 through 480 (30 kV BIL)
(Low-voltage ratings of 208Y / 120 and 240 Delta are available through 1000 kVA only.)
Meets or exceeds latest IEEE, NEMA, and DOE standards as applicable
60 Hertz operation
65° C average temperature rise (self-cooled, OA rating)
Thermally upgraded insulation system
Core / coil optimized for lowest owning cost or lowest purchase price
Four 2 1/2 percent full-capacity high-voltage taps (two above and two below rated voltage with externally operated switch for de-energized operation) (may not be available on units with series multiple high-voltage ratings)
Side-wall or cover-mounted high-voltage bushings (must be cover mounted for ratings above 34.4 kV)
Side-wall or cover-mounted low-voltage bushings
Welded mild steel tank construction
Permanently attached cooling panels (when panels are necessary for proper cooling)
Bolted hand-hole access to internal tank compartment
Lifting hooks for balanced lifting
Bottom drain valve with filter press connection
Provision for top filter press connection
Tank grounding pad
Base suitable for jacking or rolling
Full-height flange for side-mounted high-voltage bushings (high-voltage ratings of 34.4 kV and below only)
Full-height flange for side-mounted low-voltage bushings