Download Minute Lecture on Pulse Switches

Pulse switches for houses and
apartments
Greater flexibility and more
possibilities
Guy Kasier
E&D Systems
January 2011
Leonardo
ENERGY
www.leonardo-energy.org
What are pulse switches?
•
•
•
•
•
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Bistable relay
DIN-rail mounting
Operated by pushbutton
Often low safety driving current voltage
Used in controlling lights
Source: Eltako
Conventional installation
1
2
3G1.5
3G1.5
Switch
Switch
1
230VAC
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2
3G1.5
3G1.5
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3G1.5
Pulse switches
3G1.5
3G1.5
1
2
Pushbutton
Pushbutton
1
24VAC
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16x0.8
2
16x0.8
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16x0.8
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)
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Conventional installation
1
2
3G1.5
3G1.5
Switch
Switch
1
230VAC
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2
3G1.5
5G1.5
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3
3G1.5
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
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Pulse switches
3G1.5
3G1.5
1
2
Pushbutton Pushbuttons
1
24VAC
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16x0.8
2
16x0.8
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3
16x0.8
Additional pulse switches options (1)
• Central on/central off
• Group control on/off
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Source: Eltako
www.leonardo-energy.org
Additional pulse switches options (2)
• Combined with timed relay
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–
–
–
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
Advantages
• Increased flexibility of installation
– Easy to adapt and extend
• More options
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–
–
–
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
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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
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www.leonardo-energy.org
Links
• Catalogues from various manufacturers (Schneider
Electric, ABB, Siemens, Legrand, Hager, etc.)
• Website Eltako: www.eltako.com
Leonardo
ENERGY
www.leonardo-energy.org