Indira Gandhi International Airport Terminal 3


Inaugurated in July 2010, Terminal 3 at Indira Gandhi International Airport, Delhi, has a capacity of 34 million passengers a year and is reputed to be the fifth largest airport passenger terminal in the world. The huge 111,600 square meter complex is arranged on nine levels and has two piers, each of which is 1.2 km long. The airport's vital statistics include 169 check-in counters, 78 gates, 97 automatic walkways, 96 immigration counters, 20,000 sq m of retail space and 14 baggage carousels. All of this requires lighting and illumination. Even though 80 percent of the terminal's structure is made of glass, the airport's lighting system is huge. It comprises more than 100,000 light fittings and illumination points, and some 11,000 electrical and electronic devices like actuators, dimmers and detectors.

What were the challenges in fulfilling the wishes of the customer?

In such an airport building, the lighting must be switched on 24 hours a day. Nevertheless, the customer requested energy-conserving lighting management as brightness can be reduced, and automatic dimming/ switching can follow patterns of demand. It is possible to make maximum use of daylight, and systems can be automated using timing and occupation programs. The capability of the KNX system is demonstrated by the fact that it can cope with 100,000 light fittings which are switched and dimmed.

Why was the decision for a KNX solution made?

The Delhi Airport project represents an outstanding reference for KNX. The flexibility of the system, its connectivity with other standards and the option of combining decentralized functions to one central building management hub are major benefits and deciding factors for the KNX system. This latter function is performed using IP routers, KNXnet/IP and Ethernet network. This allows central control of the lighting system and connection of error messaging via interfaces with the Building Management System. Furthermore the communication between KNX and the Building Management System (BMS, Honeywell), the heating, ventilation and air conditioning system (HVAC, ETA), the fire alarm system (Fire CMS, Minimax), a Network Management System, the Energy Management System (Electrical CMS, ABB) and the integration of visualisation software provide the basis for complex applications involving energy conservation, safety and comfort.

Which measures to increase the energy efficiency of the building were intended?

For safety and security reasons, the lighting in some parts of the terminal has to be switched on 24 hours a day. But in other parts of the complex, such as the gates, restrooms and the arrivals and departures halls, the ABB solution uses its unique scope for energy-efficient lighting management to the full. It does this by activating, deactivating, switching and dimming the lighting in accordance with preset demand, timing and occupation patterns. For instance, the lighting is automatically deactivated and dimmed to 10 percent of its full strength when a gate or check-in area is not in use. In restrooms, the lighting increases from 50 to 100 percent brightness whenever someone enters, and in offices and service rooms the lighting is controlled by presence sensors. 


Lighting Control and Regulation

  • Switching
  • Dimming
  • Central Control
  • Time Control
  • Daylight Dependant Switching
  • Constant Light Regulation
  • Light Scenes
  • Panic Lighting
  • Presence dependent Control

Energy and Load Management

  • Consumption Measurement
  • Circuit / Socket Outlet Switching
  • Circuit Monitoring

Security and Fault Monitoring

  • Peripheral Protection
  • Internal Surveillance
  • Smoke Detection
  • Water Detection
  • Gas Detection
  • Presence Simulation
  • Panic Switching
  • Emergency Call
  • General Fault Handling

Heating, Ventilation and Air Conditioning (HVAC)

  • Presence dependent Control

Security and Fault Monitoring

  • Internal Surveillance
  • Smoke Detection
  • Presence Simulation
  • Panic Switching

Operation, Indication and Visualisation

  • Display Panel
  • Visualisation via PC
  • Control via Television

Central Automation

  • Complex Logical Operations
  • Time Control
  • Macro Operations
  • Collective Scenes

Remote Access and Control

  • Remote Control via Internet / Telephone
  • Messaging via eMail / SMS / FAX

Interfacing to other Building Systems

  • Connection to other Systems via Analogue or Digital Inputs
  • Communication Gateway to other Systems (OPC Server via NetX Automation)

Key Data

General Facts

Owner / Investor



India, New Delhi

Type of Building


Year of Construction






Integrator / Contractor

Entelechy Systems

Floor Space (m²)

111,600 m²

No. of Floors


KNX Installation Facts

Number of Lines


Number of Components


Construction Volume

150 Billion INR      

Electrical Installation

4 Billion INR

KNX Proportion

200 Million INR


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