main receiving station(MRS)

1. INDUSTRIAL TRAINING
REPORT-VIZAG STEEL
PLANT
INTERNSHIP IN SUB STATION
4/4 ,B.E ,EEE-B
P SRAVAN KUMAR
313126514078
P VAMSI SAGAR
313126514083
P VINOD KUMAR
313126514084
T HARISH

2. CONTENTS
• INTRODUCTION TO VIZAG STEEL PLANT.
• 220/132/33/11 KV SUB STATION.
• POWER TRANSFORMER.
• POTENTIAL TRANSFORMER.
• CURRENT TRANSFOMER.
• ISOLATOR
• CIRCUIT BREAKER.
• LIGHTNING ARRESTOR.
• BUSBARS.
• PROTECTIVE RELAY.
• WAVE TRAP.
• GIS (Gas Insulated Substation).
• CONCLUSION.

3. INTRODUCTION TO VIZAG STEEL
PLANT
• One of the largest steel plant in the country with
a revenue of Rs. 11.5 Thousand Crore and a
profit of 1.5 Thousand Crore
• One of the major steel producers in India, Vizag
Steel Plant has an honor of NAVARATNA
company.
• Most critical component of the industry, over
25000 strong employees, because of whom the
company has floated into profits.

4. 220/132/33/11 kv substation

5. POWER TRANSFORMER
• For stepping up or down the system voltage, power transformers
are used in the substations.
At generating end, the voltage is only stepped up
for transmission of power while at all the
subsequent substations the voltage is gradually
stepped down to reach finally to working
voltage level

6. POTENTIAL TRANSFORMER
• The potential transformer is used to
convert one electrical form to another
form .
• It is used to measure current
&voltage.

7. CURRENT TRANSFORMER
• The current transformer is used to step
down .
• It is used to measure/control/protection.
• It step downs very high currents to very
low currents.

8. ISOLATOR
• Disconnector /isolator is used to make sure
that an electrical circuit can be completely
de-energised for service/maintenance
• Isolator is an off-load device

9. CIRCUIT BREAKER
• Circuit breakers are used for switching and protection.
• Brake a circuit automatically under fault condition.
• A circuit breaker consist of fixed and moving contact
called electrode under normal condition.

10. LIGHTNING ARRESTOR
• Lightning arrestor provide protection to all the equipment against the
HV an electric discharge between cloud and earth
between cloud and charge enters of some loud
is known as lightning.
• It is provide to safety transmission &distribution
line.

11. BUS BARS
• Bus bars are common electrical component
through which a large no. of feeders operating
at some voltage have to connected.
• It is used to connect to transmission line
which supplies electricity.
• It is made of high material conductor.

12. PROTECTIVE RELAY
• A Protective relay is a device which detect the fault.
• It is to detect after their go to command
circuit breaker
• It is provide to safety in electrical equipments.

13. WAVE TRAP
• Wave Traps are used at sub-stations using
Power Line Carrier Communication (PLCC).
• PLCC is used to transmit communication and
control information at a high frequency over
the power lines. This reduces need for a
separate infra for communication between
sub-stations.

14. GIS (GAS INSULATED SUB STATION)
• Compact ,multi component assembly
• Sulphur hexafluoride (sf6)gas the primary insulated
medium has a superior dielectric properties used at
moderate pressure for phase to phase and phase to
ground insulation
• Preferred for voltage ratings of
72.5kv,145kv,300kv,420kv.
• Every equipment in substation is enclosed with sf6
gas.

15. ADVANTAGES OF GIS:
• It occupies very less space
• More reliable than Air insulated substations
• Number of outages due fault is less
• Maintenance free

16. CONCLUSION
• Now from this report we conclude that ELECTRICITY plays a
important role in daily life
• In this training we are made aware that how transmission of power in
substation for various departments in VIZAG STEEL PLANT

17. THANK YOU