The project has been made in a group on Emergency Lighting System by college students of the second year at a National Institute. An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. Emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories, apartments, and hotels. The ppt has more information on the subject.

1. EMERGENCY
LIGHTING SYSTEM
Presented by:
Hari Krishnan (2019/B/26)
Sai Kalyan (2019/B/21)
Shalvee Meshram (2019/B/09)

2. Introduction

3. What ? Why ? How?
• A System used to maintain the lighting in a possible failure of the normal energy source.
• Stops the user from being into a difficult situation because of unexpected darkness and
helps the user to get access to make an instantaneous emergency light.
• Emergency lights are connected to the electrical supply of the building. Each light has its
own circuit. These lights include a battery so that it works like a backup power supply
once the building loses its power supply.

4. that part of an emergency
lighting system provided
to enable normal activities
to continue substantially
unchanged.
that part of an emergency lighting
system that provides illumination
for the safety of people leaving a
location or attempting to
terminate a potentially dangerous
process beforehand.
Categories
Emergency
Escape Lighting
Escape Route
Lighting
Open Area
Lighting
High Risk Task
Area Lighting
Standby Lighting
that provides illumination for the safety of people
involved in a potentially dangerous process or
situation and to enable proper shut-down procedures
for the safety of the operator and other occupants of
the premises.
ensures that there is sufficient
illumination to allow the occupants of a
building to reach a place where an
escape route can be identified.
identifies the escape route and keeps itsufficiently lit. This
includes illuminated fire exit signs but alsoemergency
lighting such as emergency lighting bulkheads

5. Journey of Emergency Lights
Earliest Models
Incandescent light bulbs / Battery backups using lead-acid battery to store 120-
volt charge
(huge, dim)
Modern Models
High Intensity LED / Halogen bulbs – with 6-12 volts
( high-lumen, wide-coverage, long-lasting )

6. Types:
Surface
Recessed Portable

7. Making of Emergency Lighting System

8. Circuit Diagram:

9. Components Required:
Diodes
Lamp
Centre
Tapped
Rectifier
SCR
Battery
Resistor
Capacitor

10. DESIGNING:
The required components (with specifications) of the 6v emergency light circuit
diagram mainly include :
SCR -1
Resistor - 3
Capacitor - 3
Battery 6V
Centre-tapped rectifier
Lamp
Diodes -3

11. Procedure:
The emergency light can be designed
as following.
Connect the circuit on the breadboard
as per the diagram shown using the
above components.

12. The design of this circuit is very easy so that it can be arranged in a little box. As a
power source, a 6V small battery is used to provide the supply to the circuit.
HOW DOES IT WORKS ?
Initially the input AC(230V) supply is stepped down to 6-0-6V by step down
transformer.
The full wave rectifier(D1&D2) gives the 6V DC supply . It keeps the lamp in ON
state.
Also another current flows through D3 & Resistor R3 this current charges the battery.
When AC power supply is OFF , the SCR cathode voltage decreases. Due to battery
voltage decreases. Due to battery potential and positive gate pulse SCR turns ON .
When this battery potential is applied across lamp the lamp will gets ON .

13. More details……
Type of Power Supply used:
• Self-Contained – Single Point
OR
• Battery Source
Mode of Operation: Maintained or non-maintained is the principal which is decided by the
use of the premises.
• Maintained emergency luminaire
• Non-maintained emergency luminaire

14. Applications:
o Used as emergency lamps (in order to keep away from unexpected power failures) in:
• buildings
• homes
• workplaces
• study rooms
o Used in several industries

15. Some more uses..

16. MEDICAL EMERGENCY

17. THANKYOU
SOURCE : INTERNET