FRABA Quecksilber Relais Röhre Typ GRSD Nr. 2020
Mercury Relay Tube
Relais à mercure
FRABA was founded by Franz Baumgartner in 1918 as the FRABA Fabrik Elektr. Apparate. In the same year, Franz Baumgartner received his first patent for a “Petri Switch”; this patent would be the first of many. The company specialized in producing mechanical relays for electrical alarm and safety devices; until 1943, the company was based in Cologne-Klettenberg with two departments. From 1919 onward, the production and manufacturing expanded. It is still active today.
This is basically a small incandescent lamp (the wire must not glow) in which the mercury is moved by the hot air pressure, establishing a contact between two wires.
Spule an 220 Volt
Kontakt 4 Amp
Belastung bei 220 Volt
Hauteur • Height • Höhe : 134 mm • 5" 1/4
Diamètre • Diameter • Durchmesser : 47 mm • 1" 7/8
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