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To increase the flexibility of the electrical installation in the house, we can use pulse switches. Moreover, there are many other benefits and additional capabilities.
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Pulse switches for houses and apartments
Greater flexibility and more possibilities
Guy KasierE&D SystemsJanuary 2011
LeonardoENERGY www.leonardo-energy.org
What are pulse switches?
• Bistable relay• DIN-rail mounting• Operated by pushbutton• Often low safety driving current voltage• Used in controlling lights
Source: EltakoLeonardoENERGY
Conventional installation
LeonardoENERGY www.leonardo-energy.org
Pulse switches
LeonardoENERGY www.leonardo-energy.org
Conventional installation
• We want an extra switch for light point 1, next to switch 2.
• To do this, we need to:– Add two wires between switches 1 and 2– Replace switch 2 with a double single-pole one
• Problems:– If cable is used between 1 and 2: it is not possible– If tube with wire: sometimes possible (depending
on type of tube and number of wires already present)
LeonardoENERGY www.leonardo-energy.org
Conventional installation
LeonardoENERGY www.leonardo-energy.org
Pulse switches
• We want an extra pushbutton for light point 1, next to pushbutton 2.
• To do this, we need to:– Replace pushbutton 2 with a double pushbutton– Connect pushbutton 3 using the same wire as for
pushbutton 1
• Problems:– None
LeonardoENERGY www.leonardo-energy.org
Pulse switches
LeonardoENERGY www.leonardo-energy.org
Additional pulse switches options (1)
• Central on/central off• Group control on/off
Source: EltakoLeonardoENERGY www.leonardo-energy.org
Additional pulse switches options (2)
• Combined with timed relay– Short push: timed relay on– Push > 1 sec.: switch on– Push > 2 sec.: switch off– Possibility of warning before lamp goes out
• 30 sec. before time runs out• Example:
– ES position: pulse switch– ER position: monostable relay– ESV position: timed relay
Source: Eltako
LeonardoENERGY www.leonardo-energy.org
Advantages• Increased flexibility of installation
– Easy to adapt and extend• More options
– Local control– Group controls– Central controls– Timed controls
• Driving circuit usually low safety voltage– e.g. with 24V AC transformer
• Less grinding and cutting work in the walls• Ceilings need not be perforated• Installation can be converted to an integrated home system with
star topology
LeonardoENERGY www.leonardo-energy.org
Disadvantages
• A little bit more installation work• A little bit more expensive – To be considered in relation to advantages and
options
LeonardoENERGY www.leonardo-energy.org
Links
• Catalogues from various manufacturers (Schneider Electric, ABB, Siemens, Legrand, Hager, etc.)
• Website Eltako: www.eltako.com
LeonardoENERGY www.leonardo-energy.org
