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Service. Experience. Quality.

We pledge customer support and satisfaction. Service is the name of our game. With over 32 years of working in and with the heating industry, BPSR brings an unmatched level of expertise and product quality to your business.

Mill Duty Applications

Spang designs these heavy-duty power supplies to operate in harsh environments with high reliability, energy efficiency and extended life. They provide DC power for a wide variety of industrial applications including:

  • DC cranes
  • Electromagnets
  • Ladles
  • Synchronous motors
  • Municipal transit

Spang custom designed DC power centers are available regulated or unregulated with many features and options that enable you to precisely meet your DC power requirements.


Input voltage: 230/460 Volts AC

Output voltage: Up to 600 Volts DC (other output voltages available upon request)

Output current: Through 30,000 Amps DC (higher outputs available upon request)

Power Factor: 90% or greater when operating at full rated output

Ripple: 4.5% RMS AC ripple maximum at rated voltage and current

Efficiency: Typically 96% at full load.


  • 12-pulse rectification for reduced input harmonics and output ripple
  • Regeneration control for high inertia applications
  • Forced air or water cooling
  • Programmable logic controller

For more information on Mill Duty Applications, please contact us or visit Spang Power Electronics' Mill Duty Applications homepage.