# Relay and Emerging Sciences Engineering

Topics: Relay, Programmable logic controller, Electromagnet Pages: 4 (367 words) Published: April 13, 2013
National University of Computer and Emerging Sciences
Engineering Workshop ( EE211 )

Index:-

1

Project Title.
Introduction of Project.
List of Components.
Circuit Diagram.
Working of Project.
References.

Page

IIIIIIIVVVI-

National University of Computer and Emerging Sciences
Engineering Workshop ( EE211 )
Project Title:Automatic Phase Change By AC Relay.

Introduction of Project:My project is Automatic Phase Changer by AC relay. This is use for switching the phase by using relay. One phase is KESC and Second is UPS, if KESC source shutdown then the phase automatic shift to the UPS and the device run continuously.

List of Components:-

ii-

AC Relay (8 Pins).
Quantity – 1
Price – Rs 95

iii-

Relay Base.
Quantity – 1
Price – 60

iv-

Wall Switch.
Quantity – 1
Price – Rs 12

v-

Sockets.
Quantity – 3
Price – Rs 12 per socket
Total – Rs 36

vi-

Bulb Socket.
Quantity – 1
Price – Rs 15

2

Wood Switch Box.
Quantity – 1
Price – Rs 35

Page

i-

National University of Computer and Emerging Sciences
Engineering Workshop ( EE211 )
vii-

Wires (Red & Black).
Quantity – 6 meters
Price – Rs 8 per meter
Total – Rs 48

viii-

Switch Plugs
Quantity – 4
Price – Rs 10 per plug
Total – Rs 40
Total Project Cost
Rs – 341.

Page

3

Circuit Diagram:-

National University of Computer and Emerging Sciences
Engineering Workshop ( EE211 )
Working of Project:Introduction of Relay:A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism mechanically, but other operating principles are also used. Relays are used where it is necessary to control a circuit by a low-power signal or where several circuits must be controlled by one signal.

Working:We are connecting two Sources one is KESC and second is UPS. KESC is connected with Normally Open of the relay and Coil terminal and UPS is connected with Normally Close of the relay. When KESC...