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This is a product nameplate/specification label for a Marathon Electric Magnamax Synchronous AC Generator. The generator is a three-phase unit operating at 1,800 RPM with a rated frequency of 60 Hz and a power factor of 0.8. The model number is 573RSL2053A-P458 W, with serial number VJ 3619370-1, frame size 573, and type RSL. The unit has an open enclosure rated for 40°C ambient temperature and a 50°C temperature rise by resistance, with an insulation class of H. The standby service rating is 200 kW at 227/480 volts with 1,000 amperes. Field amperage capacity is 2.7 amps with a field voltage rating of 65 volts. The exciter bearing is designated A-73129-50, with a PMH00 regulator rated at 180 PMG volts and 300 PMG Hz. The unit is manufactured by Marathon Electric in Wausau, Wisconsin 54401, USA. Maintenance specifications indicate the generator should be lubricated every operating hours or annually using Chevron SRI or equivalent grease with a temperature range of -30°C to 175°C.