minute lecture pulse_switches
DESCRIPTION
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.TRANSCRIPT
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