Single Phase SCR Controller With Regulator Board

This controller is also called RFB-100 SCR Regulator with Firing Control, all packaged for a single-phase operation.  Options are available for 120/240/480 VAC input connection. Z brackets can be purchased separately. Details are shown below:

The photo of the single-phase SCR controller is shown below:

Hybrid Bridge Configuration is required for RFB 100

An application with a DC Power Supply using an SCR-Diode Hybrid bridge is shown below. The RFB 100 provides the SCR control. A 120, 240, or 480 VAC, single phase, 60 Hz is applied at the AC input. The rectifier bridge is made of two SCRs and two diodes. These are selected according to the voltage and current requirements at the DC output. The power transformer provides the step-up or step-down of the AC input. The “Voltage Adjust” allows the DC output to vary from 0 to maximum DC voltage. The “Current Adjust” allows the capability to limit the current to a certain value from the maximum. R46 (feedback resistor) is selected to provide the full-scale capability to the power supply. The “C” capacitor is selected to reduce the output ripple. The “R” bleeder resistor allows the path for discharge of the capacitor “C” at power shutoff.

An example of an AC to DC Power Supply using RFB 100

CEHCO can offer AC TO DC solutions using single-phase SCR controls as well as three-phase SCR controls. Since we build our own power transformers and rectifier assemblies, we can offer a fast turnaround on your project requirements. We carry a large inventory of CEHCO and other brands of SCR firing controls in-house to meet your requirements in a timely manner. To discuss your specific needs, please contact us at (714) 624-4740, or send us an email at quote@cehco.com

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