National Electric Coil Facilities

	National Electric Coil at Columbus, Ohio
	National Electric Coil at Brownsville, Texas

Overall Statistics

Corporate Statistics

• Founded in 1917
• 37,000+ square meters (400,000 square feet) of service & manufacturing areas
• Independent ownership

Technical Capabilities

• Full-service engineering design supported by a proficient, well-trained workforce
• Equipment and facilities for all types of machine uprates, redesigns, alterations and repairs
• Capability to design replacement coils/bars based on surface geometry for:
  • Any OEM, any unit size, type or make
  • Stators:
    • Conventionally-cooled (bars and multi-turn coils)
    • Water-cooled and inner gas-cooled bars
  • Rotors:
    • Conventionally- and inner-cooled rotor windings
    • Copper or aluminum
• On-going development of improved high-voltage insulation systems

Manufacturing Facilities

• Stator (Brownsville) and rotor (Columbus) windings:
  • Any OEM, any unit size or type
  • Fossil or hydro units
  • 10,000-coil annual throughput
• CAD-based design-to-manufacture system
• ISO-9001:2000 quality management systems
• Specialized large machine design programs for designing and analyzing:
  • Precise coil/bar fit, including end turn clearances
  • End turn vibration support systems

Service Facilities & Resources

• On-site service facilities:
  • Turbogenerator Rotor Service Facility for rewinds and repairs, including high-speed balance pit with running electrical testing capabilities
  • Service bays for transportable generators, exciters and high-voltage motors
  • Facility for hydro rotor field and other salient rotor pole refurbishments and repairs
• Field Service with skilled trade resources for both fossil and hydro generator units:
  • Rewinds, winding and lamination repairs and rewedges
  • Inspections & testing and general troubleshooting, including vibration issues