Three-Phase Pad-Mount Live Front Compartment Style

Howard Industries liquid-filled three-phase pad-mounted transformers are an excellent choice for any commercial or industrial underground distribution system. Typical applications include manufacturing facilities, refineries, office buildings, schools, hospitals, restaurants, warehouses, and retail stores. All Howard Industries transformers are designed, built, and tested in an ISO-9001 certified facility in accordance with applicable industry standards. All designs feature fully enclosed tamper resistant terminal compartments and can be supplied with dead-front or live-front construction, for loop or radial feed applications.

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.

Documents

KVA Ratings (65° Rise, ONAN) 45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000, 2500, 3000, 3750, 5000, 7000, 7500, 10000
High-Voltage Ratings (Delta or Wye) 2400 through 46000 (through 200 kV BIL)
Low-Voltage Ratings (Delta or Wye) 120 through 8600 or 14400Y (through 110 kV BIL)
Meets or exceeds current IEEE, NEMA, RUS, and DOE standards as applicable
Full compliance with ANSI C57.12.28 enclosure integrity standards
Externally clamped porcelain high-voltage bushings with eyebolt connectors
Externally clamped low-voltage bushings with threaded stud for full-load current through 1400 Amps, or externally clamped one-piece NEMA spade bushings for full-load current above 1400 Amps
Removable neutral ground strap in low-voltage compartment (for wye connected low-voltage ratings only)
Removable high-voltage/low-voltage neutral link, internally mounted and accessible through tamper-resistant hand hole (Wye-Wye units only)
Lifting provisions
Jacking/rolling provisions
Removable terminal compartment and bottom sill and removable doors with stainless steel hinges
Bolted hand hole on oil compartment top with tamper-resistant security cover
Three-point door latching system with recessed interlocking pentahead security bolt and padlock provision
Tank ground provisions
Mild steel tank and terminal compartment construction
Mild steel high-voltage/low-voltage compartment barrier
Domed top surfaces on tank and terminal compartment to prevent water retention
Recessed tank compartment bottom
Electrostatically applied powder paint finish with olive-green polyurethane top coat (Munsell 7GY 3.29/1.5) provides excellent resistance to chipping, fading, abrasion, and corrosion
Oil fill/oil level plug
Automatic pressure relief device mounted in terminal compartment
Oil drain valve with sampling device
Electrical grade mineral oil insulation fluid with oxidation inhibitor
Laser engraved anodized aluminum nameplate
Decal bushing designations
Loadbreak high-voltage bushing inserts or externally clamped integral (one piece) high voltage bushings for dead-front applications
Low-voltage connectors, including various screw-on or slip-on types
Insulated interphase barriers
Lightning arrester mounting provisions
Externally operable nonloadbreak high-voltage tap switch with one of the following tap ranges:
• Four 2.5% taps above normal
• Four 2.5% taps below normal
• Two 2.5% taps above and two 2.5% taps below normal
• Taps at 13800/13200/12870/12540 for transformers with a nominal high voltage rating of 14400 (may not be available in combination with dual high-voltage switch)
Externally operable dual high-voltage switch (may not be available in combination with high voltage tap switch)
Fault indicators or fault indicator mounting provisions only
Internal expulsion fuses, alone or in combination with internal backup current limiting fuses
Draw-out expulsion fuses with isolation links, alone or in combination with internal backup current limiting fuses
Draw-out full-range current limiting fuses in dry-well canisters with or without interlocking loadbreak switch
Internal full-range current limiting fuses
Arc Strangler® fused disconnect switches
MOV surge arresters, including under-oil or panel-mounted types
Drip shields for use with draw-out expulsion fuses
Externally operable two-position or four-position high-voltage loadbreak switch
Internal low-voltage circuit breaker with external operating handle, or external molded case low-voltage circuit breakers
High capacity pressure relief device mounted on tank cover
Drain valve with sampling device
Total stainless steel or hybrid (mild steel/ stainless steel) construction
Temporary access service provision (conduit hole)
Hexhead security bolt (pentahead standard)
External Watt-hour meter base with or without meter, or mounting provisions only
External potential transformers
External current transformers
Tank ground connectors
Cover mounted throat for bus duct connection
Dial type temperature gauge
Dial type liquid level gauge
Dial type pressure/ vacuum gauge
Cooling fans or fan mounting provisions only
Amorphous Metal Core
Seed-based vegetable oil insulation fluid
Laser engraved stainless steel nameplate (aluminum standard)
Custom stenciling or labeling
NEMA safety labels
Compliance with Canadian Standards Association (CSA) standards or other non- U.S. standards