Hewlett - Packard 6551A Test Equipment

Maximum Output Voltage 8.00 Volts
Maximum Output Current 50.00 Amps
Maximum Output Power 0.50 kW
Panel Meters Digital
External Cooling Forced Air Cooled
Accessories

500 Watt
Other Information

Analog programming of output voltage and current
Self-test initiated at power-up
Electronic calibration from front panel
Five nonvolatile store and recall states
User-defined power-on state
Fan-speed control to minimize acoustic noise
Auto-parallel of up to three 655xAs
Over-voltage and over-current protection
Over-temperature protection

https://www.keysight.com/us/en/support/6551A/500-watt-dc-system-power-supply-8v-50a.htm

Extended Description Details at 655xAseries_datasheet_May04.pdf
Power Requirements 120/240 V 50/60 Hz 1 Phase
Exterior Dimensions
Width 17.000 in (43.2 cm)
Depth 20.000 in (50.8 cm)
Height 5.250 in (13.3 cm)
Weight 55 lb (25 kg)