Motorized Variable Transformer Controlled Power Supply, 12 to 350 VDC, 500 ADC output

Product Overview

Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with a Variable Transformer (also known as variac). The Variable Transformer can be adjusted manually or with a motorized control. The AC input power can be single phase or three phases. 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 the motorized variable transformer controlled power supply is shown below:

The photo of a motorized variable transformer controlled power supply, part number 18557PS is shown below:

Specifications:

• Motorized Variable Transformer Controlled Power Supply, P/N 18557PS
• Input: 380 VAC, 3 PH, 60 Hz
• Output: 12 to 350 VDC, 500 Amps max.
• Variable Transformer is used to vary the output.
• Input control is provided with a 10 turn potentiometer to cover full range from 12 VDC to 350 VDC.
• Ripple: 5%
• Indoor enclosure: 70″ H x 65″ W x 50″ D
• Weight: 4000 Lbs approximately
• Analog voltmeter and ammeter are installed to monitor the output.
• A 3 digit digital voltmeter is provided to fine tune the output voltage.
• All input/output connections are available inside the enclosure.
• The complete system is packaged as one enclosure.
• Motorized variac requires two minutes of travel time from minimum to maximum output.

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.