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Confidential © 2009 Wipro Ltd
© 2009 Wipro Ltd - Confidential
Lighting Automation and Control Techniques
Kshitij K GhareProduct ManagerIndustry and Lighting
controlsWipro Lighting, India
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Need for Lighting Controls
Lighting 18-20%
Other ( HVAC, UPS)
80-82%
Lighting can be greatest opportunity for energy savings
Lighting consumes 18-20% of the annual electricity used in office building
Lighting controls can cut this cost by 30-40%
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Occupancy Sensing
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Sensing Technology
Passive Infrared Sensing• Electronic Sensor constantly tracks the displacement of Infrared
heat generated by human body in the area and based on this tracking controls lighting system
• Advantages
§ PIR sensor would detect only movement of human being in area. It fails to detect spurious movement signals generated by ventilation, running machinery, movement of animals (cold body)
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Sensing TechnologyMicrowave Sensing• In this technique, microwave radar is used to monitor space for
movement.
• This involves transmitting a very low power microwave signals and examining the reflected signal for frequency variations called “Doppler Shifts”
• Advantages
§ Highest detection area
§ Sensitivity is extremely high
§ Can be used for directional sensing, hence suitable for long narrow areas
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Presence detection• Detectors will switch on lig hting
automa tically when person enters room
• Detectors switches off lighting automa tica lly when no movement detected
Detection Methods
Absence detection• User will switch On lights ma nually upon
entering room
• Detectors switches off lighting automa tica lly when no movement detected
Presence detectors can help you meet energy reduction targets in new and existing building
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Occupancy SensorsApplication areas
è Open plan Workstations
è Meeting Rooms
è Corridors
è Cabins
è Class rooms
èWarehouse
è Conference rooms
è Gymnasiums
Savings upto 40%
Range of Sensors
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Daylight Sensing
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Daylight Control
Daylight control can be achieved by
§ Switching photocell
§ Regulating photocell
• Switching photocell
o Photocell checks available daylight in area and if sufficient daylight is present, then lights would be switched off
• Regulating photocell
o Photocell checks available daylight in area and regulates lighting to obtain constant lighting level
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Daylight Control
Presence detected, Insufficient daylightLights full ON
How Daylight sensing works?
Presence detected, Sufficient daylight
Lights o/p regulated
Absence detected,
Lights full OFF
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Occupancy SensorsApplication areas
è Open plan Workstations
è Meeting Rooms
è Corridors
è Cabins
è Class rooms
è Conference rooms
Range of Daylight Sensors
Savings upto 30%
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Architectural Dimming
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Architectural Dimming
Architectural dimming control offers….
è The ability to create customer specific lighting conditions depending on application
è Precise control of lighting in any area without need for numerous rotary dimmers and separate switches
è Controls all modern light sources like GLS/HL/1-10 V/DSI/DALI
è Slowly fades between lighting scenes-eyes have time to comfortably adjust
è Integrates easily with touch screens and AV equipments
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Architectural dimming• Custom scenes can match your activity or mood to visual environment• Set the l ights as you need them
Start up scene
General Dicuss ion PowerPoint presentation
Tea Break
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Architectural dimming system
Application areas
è Training centers
è Board rooms
è Video conference rooms
è Hotels
è Residence
Range of Scene select systems
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Centralized control/monitoring systems
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Centralized control system
A Centralized control or monitoring system manages both electricand daylight.
Benefits of Managed lighting system:
èSaves electricity and protects environment
èSaves money
èIncrease productivity and comfort
èCreates more flexible space
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Centralized control system
Lighting Control strategies
Light Level TuningSets target lux levels based on customer requirement in each space
Scene & zone controlUsers can select preprogrammed scenes
Personal light controlAllows user to select correct light level for desired task
Controllable window shadesControl window shades as per daylight availability
Astronomical time clockLights are turn On, Off or dimmed automatically at certain times of day
Solar adaptive shadingAutomatically adjust window shades based on angle of sun
Remote monitoring and controlAllows management of your building from any where
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Centralized control system
Can control specific area in a floor
Can control multiple floors together
Whole building light management is possible
Scalability of Centralized control system
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Centralized control system
Application areas
è Office space
è Hotels and Restaurants
è Large auditorium
è Animal research centers
Savings upto30-40%
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Thank You
Wish you energy savings through the year
Let’s do our bit for our Nation
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