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> Chromalox heater FURNACE100A scr temperature controller
Chromalox heater FURNACE100A scr temperature controller
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Chromalox Three Phase Six-SCR Power Pak
3 Phase Six SCR Power Pack, Phase Angle Control (Specify 1A for 3-wire and 1B for 4-wire loads), 100 AMP, 480VAC, 4-20ma
Features: The Chromalox Model 7830 Three-Phase, Six-SCR Power Pak can switch loads up to 400 amps at up to 575 VAC and will operate in balanced or severely unbalanced load applications. SCR switching is important for applications where precise power control is necessary to maintain constant temperatures or power.
• Any speciality heater with a resistance change from hot to cold
The 7830 is a solid state, highly versatile power pak with plug-in firing control boards, which can be changed in minutes from one firing technique to another. Firing techniques include: “Phase Angle Firingâ€, “ON/OFF Power Control†(Contactor) and “Proportional Power Control†(Zero Voltage Switching, DOT fire). Chromalox’s exclusive DOT (Demand Oriented Transfer) firing switches the fewest number of cycles to provide the most precise zero crossover control. At 50% output the unit’s output would alternate between three electrical cycles on (49.8ms) and three cycles off. At 51% the output would continue with three cycles on / three cycles off and would eventually integrate three extra “on†cycles for the additional one percent. With the exception of phase angle firing, DOT firing is the most precise method of SCR control. DOT firing is preferred in many applications because phase angle firing creates unwanted RFI. DOT is excellent for applications where consistent heater/process temperature control is critical.
• Phase Angle Firing • Zero Cross-Over Firing • Proportional (DOT) • On/Off • Chromalox’s Exclusive DOT Firing • 3 Phase Delta, 3 Wire Wye or 4 Wire Wye Connected Loads • Six SCR Full Converter • 208-575 Vac @ 30-400 Amps • Interchangeable Modular Firing • Line Voltage Compensation • Shorted SCR Detection Option • dV/dT Transient Voltage Protection
Product Link: http:// /literature/7830pds.pdf
Product manual: http:// /literature/7830manual.pdf
Schematic: http:// /literature/7830schematic.pdf
Item is used, tested and in excellent condition. Removed from working Industrial Furnace. Manual is available from link above.
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