Single-phase Three-wire Output from One AC Power Supply

Posted on: June 23rd, 2021 by Doug Lovell

A single-phase three-wire output can be achieved usually by connecting two AC power supplies. However, if you need to output from one AC power supply and the required current through DUT is small, you can output it by configuring the following circuit.
1. Single-phase Three-wire System
In the figure below, R1=R2. Appropriate resistance for power supply should be applied on R1 and R2. With smaller resistance, the output can be nearly equivalent to the actual single-phase three-wire. The L1 to N voltage and L2 to N voltage are half the L1 to L2 voltage.

With the above circuit configuration, the L1 to N and L2 to N at AC100V are not available to consume the power.
2. Other Method
Transformer can be used to provide the single-phase three-wire output.

Products Mentioned In This Article:

  • Kikusui AC Power Supplies please see HERE