Medium Power Substation
Howard Industries medium power substation transformers are designed and built to provide outstanding performance and reliability in the most demanding utility and industrial applications.

Our current product scope includes ONAN ratings up to 60 MVA with primary voltage ratings through 161kV. Product scope will go up to 230 kV. An extensive range of features and accessories are available, including on-load tap changers, forced-air cooling systems, fluid preservations systems, and other options to satisfy the special requirements of virtually any application.
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Medium Power Substation Transformer Facility
in Ellisville, Mississippi
Our experienced design engineers employ the latest available computer-based design tools, including three-dimensional CAD, parametric modeling, and finite element analysis, to ensure that our transformers perform as intended. Our new manufacturing facility was designed and built specifically for the efficient production of medium power transformers and is equipped with the latest available technologies including the vapor phase drying process.

Standard Features
• Manual de-energized tap changer with padlocking provisions
• Transformer lifting lugs
• Dial-type fluid level gauge
• Dial-type fluid temperature gauge with resettable min/max drag hand
• Dial-type pressure/vacuum gauge
• Dial-type winding temperature gauge for forced-cooled transformers
• Automatic pressure relief device
• Laser-engraved diagrammatic nameplate
• Tank grounding pads
• Base construction suitable for skidding in all directions
• Jacking provisions
• Fluid fill valve
• Fluid drain valve
• Sealed-tank fluid preservation system
• Mineral oil dielectric fluid
• High efficiency design with optimum combination of price and operating cost
• Cylindrical coil construction
• Mitered cruciform core construction
• Vapor-phase coil drying process
• Transformers meet or exceed the requirements of all applicable ANSI,
  IEEE, and NEMA standards
Optional Features
• Bushing-mounted current transformers
• Surge arresters and mounting brackets
• High-voltage and/or low-voltage terminal compartments
• Wye-delta or series multiple terminal connections
• Provisions for forced air cooling
• Forced air cooling with automatic control system
• Inert gas fluid preservation system or air bladder
  conservator fluid preservation system
• Dial-type winding temperature gauge
  (standard for forced-cooled transformers)
• Electronic temperature indicator
• Fiber-optic winding temperature indicator
• On-load tap changer with microprocessor-based control
• Silicone or natural ester dielectric fluid
Catalog Sheet
  Medium Power Substation Transformers Catalog Sheet
Instruction Manuals
  Installation, Operation and Maintenance Manual
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