resentation on m.c.b and e.l.c.b

1. PRESENTATION ON M.C.B
AND E.L.C.B
PRESENTED BY:-
Ansh Garg(806)
SUBMITTED TO:
Mrs. Ramneek kaur Gill
Lecturer of E.E Dept.

2. Pictorial View of M.C.B
Double Pole Single Throw M.C.B Single Pole Single Throw M.C.B

3. CONTENT
INTRODUCION
FUNCTION
CONSTRUCTION OF MCB
WORKING PRINCIPLE
ADVANTAGE
APPLICATION

4. INTRODUCTION
• An MCB is an automatically operated electrical switch.
• Miniature circuit breakers are intended to prevent damage to an
electrical circuit as a result of excess current. They are designed to
trip during an overload or short circuit to protect against electrical
faults and equipment failure.

5. FUNCTION
• The Function of the M.C.B is Switching mechanism i.e it simply
on/off the circuit connected by it.
• Its main fuction is the Protection of appliaces or other electrical
equipments from overloads and short circuiting.

6. CONSTRUCION

7. • Mcb is meant for two type of overcurrent situation overload and
short circuit.
• It contain of magnetic and thermal trip unit.
• Both units acts independently and mechanically with breaker’s
trips mechanism to open breaker’s contact.
• The magnetic trip unit protect against a short circuit.
• The thermal trip unit protects against continuous overload

8. HOW IT WORKS ?
• Lets understand through an animation.

9. TESTING OF M.C.B

10. APPLICATION
• A mcb is used in new construction instead of the older type of
fuse.
• Circuit breaker are small device used to control and protect
the electrical panel and the other device from overflowing of
electrical power.
• Mcb are much safer than the typical fuse because they can be
reset manually and because they handle much larger amounts
of power hence they are used in home application.

11. Pictorial View of E.L.C.B

12. CONTENT
• INTRODUCTION
• FUNCTION
• CONSTRUCTION
• WORKING PRINCIPLE OF ELCB
• ADVANTAGE
• APPLICATION

13. INTRODUCTION
• An elcb is a safety device used in electrical insallation with high earth
impedence to prevent shock.
• It detects small stray voltage on the metal enclosure of electrical
equipment and interrupts the circuit if a dangerous voltage is detected.
• It basic function is to detect a fault condition and then must be
replaced,circuit breaker can be rest to resume normal operation.

14. FUNCTION
• An elcb is special type of latching relay that has a bulding,incoming
mains power connected through it switching contact so that the elcb
disconnected the power in an art leakage condition.
• The elcb detects fault current from live to the earth wire within the
insallalization it protects.
• If sufficiently volage aapears across the elcb sence coil,it will switch
off the power ,and remain off until manullay reset.

15. CONSTRUCTION

16. HOW IT WORKS ?
•Lets understand through an animation.

17. WORKING OF ELCB
•When the fault occurs, the leakage current start
flowing through conductor so there will be non zero
flux set up in current transformer core.
•The metal housing of the induction of the induction
motor is always connected to earth.
•If user standing on earth touch the live point the
protection against such current is essential and it is
provide by device called elcb

18. TESTING OF E.L.C.B

20. ADVANTAGE
• They are less sensitive to fault condition therefore have less
nuisance strips.
• They can be aarnnged to protect against cable damage only.
• And not strip on faults in down line installations.

21. THANK
YOU