Electro Products PSR-500-55 Regulated DC Power Supply 0-55V 10A 117VAC

Electro Products PSR-500-55 Regulated DC Power Supply 0-55V 10A 117VAC

The Electro Products Laboratories PSR-500-55 is a linear regulated DC power supply providing a continuously variable output of 0 to 55 volts DC at up to 10 amps continuous. Built for benchtop use, it features large analog panel meters for real-time voltage and current monitoring, a single rotary output voltage control, front-panel output terminals, and an integrated output circuit breaker. This unit has been tested for correct operation and is in good working order.

Specifications & What's Included

• Model: Electro Products Laboratories PSR-500-55
• Type: Linear Regulated DC Power Supply
• Input: 117 VAC, 60 Hz
• Output Voltage: 0–55 VDC (continuously variable)
• Output Current: 0–10 Amps maximum continuous
• Number of Outputs: 1
• Front panel: analog DC voltmeter, analog DC ammeter
• Output voltage control: large center rotary knob (INCREASE direction marked)
• Output terminals: positive (+) and negative (–) binding posts on front panel
• Output circuit breaker: front-panel mounted
• Load type: resistive load only (as marked on front panel)
• Form factor: benchtop, steel enclosure with ventilated rear panel
• Carry handle: rear-mounted
• Power cord: attached, multi-pin plug
• Manufacturer: Electro Products Laboratories, Inc., Chicago, Illinois 60648
• Made in USA

Applications

Linear regulated DC bench power supplies like the PSR-500-55 are standard instruments in electronics labs, production test stations, and educational settings where a clean, adjustable DC voltage source is required. The 0–55V output range makes this unit useful for powering and testing a wide variety of electronic circuits, components, and sub-assemblies that require voltages above the more common 0–30V range of smaller bench supplies. The Electro Products Laboratories PSR-500-55 dates from the mid-20th century era of American-made analog benchtop instruments — a period when heavy linear transformer-based designs were the standard approach before switching power supplies became prevalent. The front-panel analog meter movement gives direct visual feedback of both output voltage and load current without any digital processing, which some applications and technicians still prefer for its simplicity and reliability. Because of its resistive-load-only rating, it is best suited for resistive or moderately reactive loads rather than highly capacitive or inductive circuits.