1. Pulse switches for houses and apartments Greater flexibility and more possibilities Guy Kasier E&D Systems January 2011 Leonardo ENERGY www.leonardo-energy.org

2. What are pulse switches? Bistable relay DIN-rail mounting Operated by pushbutton Often low safety driving current voltage Used in controlling lights Source: Eltako Leonardo ENERGY

3. Conventional installation 3G1.5 Switch 230VAC 12 12 3G1.5 Leonardo ENERGY www.leonardo-energy.org

4. Pulse switches 16x0.8 3G1.5 Pushbutton 24VAC 12 12 16x0.8 Leonardo ENERGY www.leonardo-energy.org

5. 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) Leonardo ENERGY www.leonardo-energy.org

6. Conventional installation 3G1.5 5G1.5 Switch 230VAC 12 12 3 3G1.5 Leonardo ENERGY www.leonardo-energy.org

7. 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 Leonardo ENERGY www.leonardo-energy.org

8. Pulse switches 16x0.8 3G1.5 PushbuttonPushbuttons 24VAC 12 12 3 16x0.8 Leonardo ENERGY www.leonardo-energy.org

9. Additional pulse switches options (1) Central on/central off Group control on/off Source: Eltako Leonardo ENERGY www.leonardo-energy.org

10. 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 Leonardo ENERGY www.leonardo-energy.org

11. 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 Leonardo ENERGY www.leonardo-energy.org

12. Disadvantages A little bit more installation work A little bit more expensive – To be considered in relation to advantages and options Leonardo ENERGY www.leonardo-energy.org

13. Links Catalogues from various manufacturers (Schneider Electric, ABB, Siemens, Legrand, Hager, etc.) Website Eltako: www.eltako.com www.eltako.com Leonardo ENERGY www.leonardo-energy.org