Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with an SCR controller. The AC input power can be single phase or three phase. With single phase AC input, the DC output ripple is very high (50%). With three phase AC input, the DC output ripple is low (5%). This would be a key benefit for selecting three phase AC input instead of single phase.
The block diagram of a SCR controlled variable DC power supply is shown below:
The photo of the SCR controlled variable DC power supply, part number 18163PS is shown below:
Specifications:
- SCR Controlled Variable DC Power Supply, P/N 18163PS
- Input: 480VAC, 3PH, 60 HZ
- Output: 0 to 150 VDC, 200 Amp
- Power ON/OFF Contactor with overload relay
- Emergency Power Shut OFF
- Output voltmeter and ammeter installed
- Input potentiometer control
- Ripple is 5% at maximum rated voltage
- Ripple degrades as output is reduced from max
- All input/output connections inside the enclosure
- SCR control
- Over temperature protection
- Power ON pilot light indicator
- All controls are installed on the side of the enclosure
- Top cover, front and rear panel are removable & Manual provided
- Caster wheels provided for mobility
- Dimensions: 40″ H x 28″ W x 18″ D
CEHCO is a variable DC power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.
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