https://www.gossenmetrawattusa.com/products/industrial-measurement-technology/transducer-and-power-meters/transducers-for-power-current/ac-voltage/sineax-u553/
SINEAX U553 Gossen Metrawatt USA - Dranetz Technologies Inc.
AC voltage transducer, RMS, with power supply
gossen metrawattusadranetztechnologiesinc