Dimmers
In 1925 ADB produced the first theatrical dimmers by applying rheostats to the control of light in theatres, music halls and cinemas, soon followed by the RHEOTOR®
variable transformers.
From 1950 onwards, a serie of innovations resulted in dimmers based on electronic tubes (thyratrons), then magnetic amplifiers and, in 1965, on semiconductors (thyristors). These dimmers featured analogue control until 1989 when ADB delivered to the Egyptian Television EURODIM 1, the first all digital thyristor power dimming system. Further ADB innovations added the full diagnostic and the instant back-up functions, which have become standard on most dimmers.
Today, the forth generation of EURODIM dimmers, the EURODIM Twin Tech, has come to life, bringing in a high density cabinet the best of two worlds, i.e. Transistor Technology for state-of-the-art sine wave dimming, and Thyristor Technology with its proven track record.
Another ADB innovation is DimSwitch, a solid state relay which offers a unique dual capability: EURODIM Twin Tech thyristor modules (4 x 3 kW, 3 x 5 kW or 1 x 10 kW) can be programmed to function as either a switch for non-dimmable loads, or as a normal dimmer with no minimum load required.
18 Lighting Technologies
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