Generator Rotor Resources Under One Roof
NEC's Rotating Equipment Service Center is a one-stop destination for your high-speed turbogenerator or salient pole rotor needs!
Manufacturing at NEC's Columbus, Ohio facility supports its projects for the maintenance, repair and retrofit work for turbogenerator and salient pole rotors, whether it is rotor windings or various components.
Columbus is a 265,000 square foot facility employing about 300 associates (three shifts) housing the company headquarters and NEC's Rotating Equipment Service Facility.. This facility focuses on the repair, refurbishment and upgrade of large rotating electrical equipment.
This location is also the management base for company-wide services for NEC's Technical Services Group, Project Management Group and Customer Service, as well as various business operations departments.
- Five large service bays and additional flex space
- Cranes: 30-, 50- and 85-tons (100-ton one-time pick capacity)
- High Speed Balancing: in-ground bunker with Schenck Balancer; dynamic stand driven by a 4000 HP DC motor. Rotors up to 200,000 pounds and up to 94 inches in diameter and 42 feet between bearing centers can be accommodated at speeds up to 4000 RPM. Seismic pick-up includes IRD Mechanalysis, and a proximity probe can be obtained on special request.
- Facilities for various cleaning methods: degreasing, steam-detergent, steam water, corn cob grit, sand blasting, glass beads.
- Arc Welding: Electrode, MIG, TIG, and Heliarc
- Brazing: Oxy-Acetylenr, Resistance, Tong 50 KVA
- Spray Welding: Eutectic Powder, Flame Spray, Rototec
- Plating: Chrome – In-house
- Lathes (Maximum Size): 70” swing x 53’ length
- Line Boring (Maximum Size): 5” bar x 60” vert. x 72” x 72”
- Coupling/Rotor Stack Pullers: Any size – can be done in-house
- Press: 600 ton
- Ovens: extendible, with precision temperature thermocouples, gas recirculating and Asbestos Burn Out, 12’ x 12’ x 28’ long
In-House Testing Capabilities & Equipment
- Full and Partial Voltage Runs
- Polarization Index
- Dielectric Absorption
- AC and DC High Potential
- Winding Resistance, Double Bridge or Biddle Ducter
- Current Balance
- Surge Comparison
- IR (Volt Drop) for Field Coils
- RSO Tester
- Flux Probe
- Current Dip: Rotor Bars
- Core Loss, Loop Test Method and “El Cid”
- Wet Test Winding
- Dimensional Tolerances
- Bearing Clearances
- Air Gap
- Vibration; Three Plane IRD