2001 Pillar MK8 Power Supply, 100kW, 3000Hz, 480V, 150A, 125kVA

The Pillar MK8 100 kW power supply is an SCR converter, voltage source inverter utilizing SCR solid state technology with a parallel tuned circuit, designed for induction melting and heating applications. This specific unit, manufactured in 2001, is rated for 100 kW output power at a frequency of 3,000 Hz. The electrical input specifications are 480 volts, 150 amps, and 125 kVA at 60 Hz. The MK8 design employs a combination of rectifier voltage control at lower power levels and inverter swept frequency at higher power levels to ensure constant output power and excellent fault protection. Standard features include a compact, front-access package for maintenance, high efficiency, and water-cooled capacitors with pressure-sensitive safety switches. The unit also incorporates comprehensive safety features such as safety interlock door switches, water pressure and temperature switches, and a diagnostic monitor to pinpoint circuit malfunctions. The parallel tuned circuit minimizes high currents through the inverter thyristors, resulting in lower power loss and higher efficiency.