UPCL 33/11kV substation Plasda, Narendra Nagar, Tehri Garhwal, Uttarakhand ,4 WEEK INDUSTRIAL TRAINING REPORT, UTTARAKHAND POWER CORPORATION LTD. SUMMER TRAINING from substaion 33 kv , Narendra Nagar

1. PRESENTED BY:-
SUMIT NAUTIYAL
ELECTRICAL ENGG.
B.TECH FINAL YEAR
1

2.  Introduction
 Single line diagram
 Incoming line
 Outgoing feeders
 Equipment used in substation
 Metering , control and relay panel
2

3.  power substation is a subsidiary station of an electricity
generation , transmission and distribution system where
voltage is transformed from high or medium to low or
the reverse using transformer .
 Example of substations:-
 440kv/220kv
 220kv/132kv
 132kv/33kv
 33kv/11kv
 33kv/0.4kv
3

4. 4

5.  PITCUL 220/33KV , CHAMBA .
 PITCUL 400/220/132/33KV , VIRBHADRA , RISHIKESH .
5

6.  11 kv PTC Feeder (7.6km)
 11 kv Dour Pump Feeder (15.4km)
 11 kv Agarakhal Rural Feeder (85.7km)
 11 kv Narendra nagar-I Feeder (2.9km)
 11 kv Narendra nagar-II Feeder (4.3kmm
 11 kv Spare/s/s Feeder
6

7.  TRANSFORMER
 INSULATOR
 ISOLATOR
 LIGHTNING ARRESTER
 BUS-BAR
 INSTRUMENT TRANSFORMER
 CIRCUIT BREAKER
 D.C SYSTEM 7

8.  TRANSFORMER: 1
 SPECIFICATION : -
Type : three phase
Rating : 3.15MVA
Volts at no load : HV- 33Kv , LV- 11Kv
Amps : HV- 55.1 , LV- 165.3
Type of cooling : ONAN
Frequency : 50Hz
Weight of core and winding : 5000kg
Weight of oil : 1892kg
Year of manufacture : 2005
There are three transformers in the substation :
8

9.  TRANSFORMER - 2
 SPECIFICATION : -
Type : three phase
Rating : 3.15MVA
Volts at no load : HV- 33Kv , LV- 11Kv
Amps : HV- 52.5 , LV- 157.5
Type of cooling : ONAN
Frequency : 50Hz
Weight of core and windings : 4000kg
Weight of oil : 1750kg
Year of manufacture : 1979 9

10.  TRANSFORMER -3
 SPECIFICATION :-
Type : three phase
Rating : 100KVA
Volts at no load : HV- 33Kv , LV- 0.433Kv
Amps : HV- 1.75 , LV- 133.3
Type of cooling : ONAN
Frequency : 50Hz
Weight of core and windings : 400kg
Weight of oil : 245kg
Year of manufacturer : 2005
10

11.  An Insulator , also called dielectric , is a material that
resists the flow of electric current.
 Insulator are used in electrical equipment to support and
separate electrical conductors without allowing current
through themselves.
11

12.  It is a disconnection switch and to be operated on no
load. It is used to make sure that an electrical circuit
can be Completely de-energized for service or
maintenance.
12

13.  Protect the equipment insulation from switching surge and
lightning .
13

14.  A bus-bar is a thick strip of copper or aluminium that
conducts electricity
 Bus-bars receive power from incoming circuits and
deliver power to outgoing circuits .
14

15.  The function of instrument transformer is to transfer
voltage and currents of power lines to a value which is
convenient for operation of measuring and relays .
 There are two types of instrument transformer : -
 Current transformer
 potential transformer
15

16.  CURRENT TRANSFORMER : - Current transformers
are used extensively for measuring current .
 SPECIFICATION : -
Voltage class : - 11kv , 50Hz
Outgoing : - 200/100/
Incoming : - 200/100/1 Amp .
16

17.  POTENTIAL TRANSFORMER :-Potential transformer
is used to operate voltmeters , potential coil of wattmeter
and relay from high voltage lines by step down to lower
voltage .
 SPECIFICATION : -
Ratio :- 33kv/100v
Primary :- 33kv
Type :- earthed
Secondary winding :- 100v 17

18. 18

19.  Circuit breakers are most important protective devices .
 Circuit breaker consist of fixed contact , moving contact ,
extinguishing chamber , roller , insulation , breather etc .
 SPECIFICATION : -
Ratings :- 36kv
Current :- 1250 Amps
Breaking capacity :- 25kA
Making capacity :- 62.5kA
Make :- Crompton Greaves
19

20. TYPES :-
 Air circuit breaker
 SF6 circuit breaker
 Vacuum circuit breaker
 Oil circuit breaker
 Air circuit breaker
20

21.  Protection scheme of transformer and circuit breakers are
D.C based . It is such that because this system is
completely independent in operation from A.C supply
except charging of battery which are D.C source .
21

22. 22

23.  Electrical4u.com .
 Power system protection and switchgear ,
Badri ram .
23

24. 24