16 EN SVĚTLO 2014/1 accessories of lighting installation ing to character of LED chip. Then, cur-rent is proportionally controlled from 0 mA to preset maximum current. Cur-rent and voltage of both mentioned LED dimmers are controlled by PWM, set such way, that there is no flashing at digital cameras, both for private or professional use, even for a continuous security monitoring.About dimmers for 230 V/50 Hz As the third dimmer in CFox line we have launched in 2013 new dual channel dimmer C-DM-0402M-RLC. It is designated for loads connected to 230/110 V AC (50/60 Hz) and uses method of phase control. From type name we may guess, that it is designated for loads of resistance type – common bulb, but also inductive or capacitive charac-ter. There is a possibility to set, whether it switches off when coming through zero (for inductive character) or switch on in zero. That is necessary for capacitive character of load, what is today most of electronic transformers, Compaq fluores-cent lamps (CFL) or compact LED lights (LED bulbs), usually with a standard thread E27 OR E14 and with electronics, what decrease and regulate main voltage to level usable for LED chips. If there is a need to dim such light sources, we have to choose that ones, who are marked „Dimmable“ from a manufacturer. New dimmer has two channels, each one for load up to 500 W. In case of need, we may connect both channels and double the load to 1 000 W. And even more, we may connect by such way four channels of two neighbour-ing modules and in the case of synchro-nous commanding from CIB bus we may continuously control light load up to 2 kW. Each channel may have set a mini-mum light intensity and by such way we prevent flashing in field of minimal intensity, where dimming electronics of LED lights or CFL works at the edge of its possibilities. A big interest has been dedicated to immunity against signals of Mass Remote Control (from electricity providers), what is a weakness of many competitive products and shows a light instability in field of the least light intensity. In a range of CFox modules, what mean modules on CIB bus, we have another modules for indirect dimming control. These are all modules with analogue voltage output 0/1 to 10 V or modules with conversion to digital bus DMX512, DALI or DSI. About indi-rect dimming control we speak because behind these modules we need another module or ballast, which is connected to the light source. About LED balls in Vinohrady Parliament One of the first references of new dim-mer C-DM-0402R-RLC has been complex control system of lighting system in new opened stylish restaurant „Vinohradsky Parliament“ in National House in Prague. The atmosphere of modern concept with a traditional Czech cuisine and traditional Staropramen Czech beer, tapped non-tra-ditionally into cooled glasses, is completed by dimming lights. Common bulbs, installed in the opening, have been soon exchanged by low energy consuming LED sources. These are placed into design clear glass balls, mounted into various lights from chrome steel. Interior is divided into few independent spaces, niches, galleries, stairways and halls. Each part has its own controlled and dimmable light circuit. Controlled system of circuits is technical-ly placed into central module Foxtrot and they are controlled from two places. For control are used two colour touch panels ID-18 placed next to two cash desks. Op-eration staff has the control panel well ar-range to two basic spaces – coffee bar and restaurant. Then, it is followed by detailed structure on each saloons, halls and nooks. Each circuit may be set manually in steps by 10% according to a specific situation. Last setting of the lights and combination of dimmers may be easy stored and in the future switched on by one touch. Into the same place on touch panel there is brought also outside lighting. For outside lighting control there is preset time program. After 6 months of operating the res-taurant, all of them are satisfied – customers, operation staff and the owners. The restaurant is still crowded with a lot of quests. They appreciate here delicious cui-sine, tasted coffee and right cooled beer. All these help them to solve the most im-portant political questions. When it’s a parliament. So we wish you a right light there in the parliament!Fig. 6. Cool chrome steel of the original tap, behind lighted cooling cabinets. Cooled beer is tapped to cooled glasses Contact:Jaromír Klaban, klaban@tecomat.cz.Teco a. s., Havlíčkova 260 280 58 Kolín www.tecomat.com www.svetlo.info