The Vanguard Universal Power Supply S2 (UPS S2) is designed to meet a utility company’s substation needs for an independent AC/DC power source. The UPS S2’s AC and DC voltage sources
can each supply up to 10 amperes.
The variable DC power supply (10 – 300 Vdc) is ideal for use as a substitute primary power source when substation batteries are not available.

The UPS S2 is best suited for operating circuit-breakers, powering substation relays, or for un-regulated charging of substation batteries.
The AC power supply is a variable isolated power source (10 – 240 Vac) that can be used to power other equipment in the substation.

The Universal Power Supply S2 delivers several important features:
• All output power sources are isolated from the primary power input by an isolation transformer.
• Voltage outputs are variable (auto-transformer) via a front panel control knob.
• The primary power input is selectable (120Vac or 240Vac).
• All voltage outputs are capable of supplying a 10 ampere load.

For ease of operation, the power output path is clearly outlined on the control panel.

This provides an intuitive visual guide for making the appropriate selections for a particular operating confi guration.
The Universal Power Supply S2 is housed in a heavy-duty, impact-resistant plastic enclosure
and is furnished with a power cord, grounding cable, and a pair of test leads with alligator clips.