THE DURGAPUR PROJECTS LIMITED

SUMMER TRANING

NAME:

Ranajit BhattacharjeeSusmit SarkarSandipan Chatterjee

YEAR: 4TH

DEPARTMENT: ELECTRICAL ENGINEERING

Netaji Subhash Engineering College

CONTENTS 1. Acknowledgement

2. Introduction

3. DPL Power Plant Review

4. Power Generation

5. Coke Oven Plant

6. Distribution

7. Transformer Protection

8. Switch Gear &Protection

9. Generator Rating

10. Conclusion

ACKNOWLEDGEMENT

The project has been prepared based on the vocational training undergone in a highly esteemed organization of Eastern region, a pioneer in Generation, Transmission & Distribution of power, one of the most technically advanced & largest thermal power stations in West Bengal, the Durgapur Project Limited (DPL), Durgapur. We would like to express our heartfelt gratitude to the authorities of DPL and Netaji Subhash Engineering College for providing us such an opportunity to undergo training in the thermal power plant of DPL. We would also thank its esteemed engineers for the plethora of knowledge and the experience they have shared with us during the training period.

We would like to give special thanks to Mr. Sisir Kumar Ghosh and Anup Kumar Bhattacharaya (training co-ordinator) for giving us the chance to be a trainee in DPL.

Last but not the least we would like to thank THE ALMIGHTY GOD without whom this would not have been dreamt of.

INTRODUCTIONThe DURGAPUR PROJECT LIMITED (DPL) was established in 1958 by Dr. Bidhan Chandra Roy. It consist of coke oven batteries, by product plant, and water works. It is under the administrative control of the Government of West Bengal.

DPL is the first undertaking of the state government which has been engaged in development of infrastructure for industries and was given the stature of industries. It has helped in development of various large, medium and small scale industry in and around Durgapur.

It produces coke oven gas, supply water and electricity. DPL’s coke oven complex is India’s largest merchant cookery producing coke of global quality. The plant has rail and linking with Kolkata, Siliguri and Dhanbad and sea port at an elevation 73m above sea level.

INFRASTRUCTURELAND: 1910 acres comprising 1060 acres for plant 850 acres for township.

RAILWAY NETWORK: separate railway Exchange Yard (DCOP siding) with railway maintained Weighbridge facility.

Unit No Year of commissioning

Present capacity Renovated capacity

I. 10.08.60 30MW ScrapII. 10.06.60 30MW ScrapIII. 23.06.64 70MW DecommissionedIV. 29.06.64 70MW DecommissionedV. 04.07.66 77MW DecommissionedVI. 01.01.87 110MW 110MWVII. 01.03.08 300MW 300MWVIII. 01.10.14 250MW 250MW

POWER PLANT

COKE OVEN

DPL comprises of three coke oven plants and 4.5 meter tall recovery type Cove Oven Batteries with 400mm along with coal washery and by-products plant. Present production capacity is 27000M.T. which can be increased to 40000 M.T with commissioning of 3rd battery.

Water Works

Originally commissioned with a capacity of MGD in 1960, the water works was expanded up to a capacity of 41 MSD of water treatment of DVC for use of company’s plant, township and other industries and domestic consumers.

SUBSTATION

Electrical substation is a part of an electrical generation, transmission and distribution system. It transfer voltage from high to low or reverse or perform many other important function. Between the generation station and consumer, electrical power may flow through substation at different voltage level.

BUS BAR: A system of electrical conductors in a generating and receiving station on which power is concentrated for distributor. It is made up of strip or bar of copper, brass or aluminium that conducts electricity within a switch board, distribution board, substation, battery bank etc. Its main purpose is to conduct electricity and not to function as a structural member. Its cross sectional size depends upon the maximum amount of current that can be easily carried.

POWER CABLE: It is an assembly of the two or more electrical conductor, usually held together with an overall sheath. It may be installed as permanent wiring within building, buried in the ground, run overhead or exposed.

Cables consist of 3 major components: 1.Conductors 2.Insulator Protective jacket

Construction and material are determined by 3 main factor:

1. Working voltage - determine the thickness of insulation.2. Current carrying capacity - determine the cross sectional size of

the conductor3. Environmental condition such as temperature, water, chemical

or sunlight exposure and mechanical impact- determine the form and composition of the outer cable jacket.

For circuit operating at or above 2000v between conductors, a conductive shield may surround each insulated conductor.

ESSENTIAL EQUIPMENTS IN POWER GENERATION

The main equipment of a power plant are

1. Steam generating equipment

2. Condensing equipment

3. Feed water heater

4. Prime mover or turbine

5. Alternator

6. Spray pond and cooling towers.

7. Control room

8. Protecting equipment

9. Switch yard

STEAM POWER PLANT WORKING OF

Steam power plant basically operates on the Rankine cycle. Coal is burnt in a boiler, which converted water into steam. The steam is expanded in a turbine, which produces mechanical power driving the alternator coupled to the turbine. The steam after expansion in turbine is usually condensed in a condenser to be fed into the boiler again. In practice, a large number of modification and improvements have been made so as to improve the thermal efficiency of the plant.

The working of a modern steam power plant can be divided into 4 main ckt namely-

1. Fuel and Ash ckt-

In DPL, coal is delivered from the supply point to storage site by road. Then the coal is taken into the boiler bunker from where it falls into the hopper by gravity and finally requisite quantity of coal falls into grate by directly or coal spreader.

2. Air and fuel Gas Circuit

Air is taken from atmosphere by forced draught fan or induced draught fan through air pre -heater, and flue passing to chimney and then admitted to the furnace. Finally, exhausted to the atmosphere through chimney.

3. Feed Water and Steam Circuit

The steam coming out of turbine is condensed and condensate is extracted from condenser by extraction pump and is forced to the low pressure feed water to raised the temperature. The feed water is now pumped through deaerator. The feed water is then pumped into boiler through the economizer in which it is further heated by the heat of flue gas.

4. Cooling Water Circuit

Cooling water is supplied from river or cooling tower through screen to remove the matter that might choke the condenser tube. It is circulated through the condenser for condensing the steam and finally discharge to the suitable position and in maintaining inflow pressure.

STEAM GENERATING EQUIPMENT OF POWER PLANT

Steam power plant consist of boiler for production of steam and other auxiliary equipment for the utilisation of fuel gas.

BOILER---

Boiler is a major equipment of steam power plant. In a boiler ,we burn coal to produce heat energy which will make the water to superheated steam. Here 2 type boilers are used namely- fire tube and water tube boiler. From boiler, steam passes to superheater, economiser, air pre –heater and then passes through the chimney to the atmosphere.

In DPL, there are 6 boiler. Here is the boilers are unit wise description

Description

Unit1 Unit2 Unit3 Unit4 Unit5 Unit6

Boiler make

Babcock & Wilcox, UK

Babcock & Wilcox, UK

Babcock & Wilcox, UK

Babcock & Wilcox, UK

Mitsubishi

ABL

Coal(MT/D)

504 504 1260 1260 1293 1848

BOILER

A boiler furnace is chamber in which fuel is burnt to liberate the heat energy and it provides support and enclosures for burners. Its walls are made of refactory materials is such as fire clay, silica kaolin etc.

SUPERHEATER

A superheater is a device which remove the last traces of moisture from the steam leaving the boiler tube and also increase its temperature above the saturation temp. It provides two principal benefits firstly, the overall efficiency is increase, secondly, too much condensation in the last stages is avoided .The superheater steam is fed to turbine through the main valve.

ECONOMISER-

It is basically a heat changer by which the temperature of feed water, coming from high pressure heater is increased to the saturation temperature or slightly less than the saturation temperature corresponding to the drum pressure. The feed water is fed to economizer before supplying to the boiler. Economiser raises boiler efficiency 10%-12%.

AIR PREHEATER-

An air pre heater increase temperature of air supplied for coal burning by driving heat from flue gasses. Air is drawn from the atmosphere by a force draught fan and is passing through air pre heater supplying to the boiler furnace. The air pre heater extracts heat from flue gas. The principle benefits of heating the air increased 1% boiler efficiency and increased steam capacity per sq. Meter boiler surface.

DIFFERENT TYPES FAN FOR BOILER HOUSE-

A fan can be defined as a volumetric machine which like pump moves quantities of air & gas from one place to another. In doing so it overcomes resistance to flow by supplying the fluid with the energy necessary for contained motion.

1) Forced Draught Fan-

To take air from atmosphere at ambient temperature to supply essentially all the combustion air can either be sized to overcome all the boiler losses or put the air in furnace.

2) Induced Draught Fan-

Used only in balanced draught unit to suck the gases out of furnace & through them into the stack. Handle fly ash laden gasses at temperature of 125-200. Speed seldom exceed 1000 r.p.m.

3) Primary Air Fan-

Used for pulverized system usually sized for 1500 r.p.m. due to high pressure.

4) Seal Air Fan-

Used to seal mill bearing, coal feeders, and coal pipes in case of pressure type mill. Speed depends on the types of arrangements of fan.

5) Ignite Air Fan-

Used to provide necessary combustion air to the ignite control damper is provided on the discharge which modulates to maintain a constant differential pressure across ignite when any ignite is in service. Typical speed 1460 rpm.

6) Scanner Air Fan-

Used to provide necessary cooling air to the flame scanners. Typical speed 3000 rpm.

INDUCED DRAUGHT FAN-

RATED POWER 671.4K/W900 HP

REVOLUTION PER MINTUE 740

FREQUENCY(HZ) PHASE 50,3

RATED VOLTAGE(VOLT) 6600

RATED CURRENT(AMP) 74

RATING MCR

INSULATION CLASS F

DUTY SI, GD(MOTOR)

ALT 1000M

AMBIENT TEMPERATURE 50

MANUFACTURED BY CROMPTION GREAVES

FORCED DRAUGHT FAN-

RATED CURRENT(AMP) 43RATED VOLTAGE(VOLT) 6600RATED POWER,PHASE 375KW/500HP,3REVOLUTION PER MINTUE 988POWER FACTOR .8MANUFACTURED BY BHEL

ELOCTROSTATIC PRECIPITATOR (E.S.P)

There is various gas cleaning device. Among them plate type of electrostatic precipitator is useful as it gave 99% efficiency. Its principle component is two sets of electrodes insulated from each other. The first set is composed of rows of electrically grounded vertically grounded plate called collecting electrodes between which are dust laden gas in flows. The second set of electrodes consist of wires, called the discharge or emitting electrodes that are centrally locked, each pare parallel plated. The ash particles are collected in the electrodes & get separated from ash hopper.

SPECIFICATION OF ESP-

NO OF EMITTERPLATE(-)VE 6*10

NO OF COLLECTER PLATE(+)VE 4*6

NO OF TRANSFORMER 6*1

TRAFORECTIFIER SET

SL NO 11427A

TYPE OTHA43/80

DC VOLT(KV) 43

CURRENT(AMPS),PHASE 8,1

AC I/P VOLTAGE(V),CURRENT(A) 360,157

AC O/P VOLTAGE(V),CURRENT(A) 49.45,1.148

RATED VOLTAGE AMPS(KVA) 56.77

MANUFACTURED BY HINLAND RECTIFIED LIMITED

CONDENSATE STSTEM-A typical condensate system consist of the following-

1. Condenser (including hot well)

2. Condensate pumps

3. Air Extraction

4. Gland coolers & L.P heater system

5. Desecrators

Condenser-

Steam after expansion through the prime mover, goes through the condenser which condenses the exhaust steam while passing through them. It provide lowest economic heat rejection temp for the steam. Condenser are two type-

1) Jet or contact condenser

2) Surface condenser.

EVAPORATOR-

Evaporator are used for supplying pure water as make up feed water in steam power plant. In an evaporator raw water is evaporated by using extracted steam & vapours. These vapours can be condensed in feed water heaters the feed water.

FEED WATER HEATER-

The steam coming out of turbine is condensed and the condensate is feedback to the boiler as feed water. These heaters are used to heat the feed water by means of bled steam before it is supplied to the boiler.

BOILER FEED PUMP-

RATED POWER(KW) 4000

REVOLUTION PER MINUTE

2986

FREQUENCE(HZ),PHASE 50,03

STATOR 66000,400

INSULATION CLASS B

ROTOR SQURREL CAGE

EFFICIENCY (%) 96.6

POWER FACTOR .914

TOTAL WEIGHT(KG) 22000

MANUFACTURED BY BHEL

ELECTRIC OIL HEATER-

TYPE INDIRECTSERIAL NO 1-84-60-091NO OF ELEMENTS 80POWER 60RATED VOLTAGE(VOLT) 440PHASE 03MANUFACTURED BY PENNWALT INDOAT LIMITED

COAL MILL-

A pulverized coal fire boiler is industrial or utility boiler that generates thermal energy by burning pulverized coal. This type boiler dominates the electrical power industry, providing steam to drive large turbines. Pulverized coal provides the thermal energy which produces about 50% of the world electric supply.

Raw coal is fed through a central coal inlet at the top of the pulverized and falls by gravity to the rotating grinding table mixing with classifier rejects return regrinding centrifugal action force the coal outward to the grinding ring where it is pulverized between the ring & three grinding rollers. Grinding load transmitted from the tension rods through the loading frame to the road assemble; hold the rollers in contact with the grinding ring the roller adjust vertically as a depth of the coal load increase or decrease.

COOLING TOWER-

In modern fossil fuel steam power plant, about 10%-15% of the heat input rejected to the atmosphere through the boiler chimney, while 48%-52% of heat input is rejected to cooling water system through the steam condensers. The circulator water takes up the heat of the exhaust steam & itself become hot. A cooling tower is a wooden or metallic rectangular structure inside of which is packed with baffling devices. The hot water is led to the tower top & falls down through the tower & broken into small particles while passing over the baffling devices. Air enters the tower from the bottom & flows upward.

POWER GENERATING EQUIPMENTS

TURBINE-

The turbine converts the stored energy in steam into rotational mechanical energy. The operation of a steam turbine is based upon the principle that the steam issuing from a small opening attains a high velocity. The basic construction of a steam turbine is simple. Steam turbine give high speed(standard speed are 3000rpm & 1500rpm).Maximum size(1000MW), minimum floor space, bulk & weight, maximum efficiency in large, suitability for highest steam pressure & temperature steam turbine consists of a rotor resting on bearing & enclosed in a cylindrical casting. The rotor is turned by steam limping against attached vanes blades on which it exerts a force in the tangential direction. Thus a steam turbine could be viewed as a complex series of wind mill like arrangements; all assemble on the same shaft. Here three types of turbine are used-

1) High pressure turbine(HP)

2) Intermediate pressure turbine(IP)

3) Low pressure turbine(LP)

ALTERNATORS

A.C generators are usually called alternators. They are also called synchronous generator. Rotating machines that rotates at a speed fixed by the supplying frequency & the number of poles are called synchronous machine

Construction

Similar to the other rotating machine, an alternator consist of two main parts namely, the stator & rotor. The stator is the stationary part of the machine. It carries the armature winding in which the voltage is generated. The output of the machine is taken from stator. The rotor is the rotating part of the machine. The rotor produces the main field flux.

1. Stator construction- the various part of the stator include the frame, stator core, stator winding and stator cooling arrangement. The frame may be of cast iron for small size machine and welded steel type for large type machines. In order to reduce hysteresis and eddy current losses the stator core is assembled with high grade silicon content steel lamination.

2. Rotor construction- there are two type of rotor namely salient pole type and cylindrical pole type.

a) Salient pole rotor- The term salient pole means projection, thus salient pole rotor consist of pole projection out of the surface of the rotor core. It have large number of poles and operating at lower speed.

b) Cylindrical rotor- Its rotor construction form a smooth cylinder. It generally has two or four poles. These rotor turbines are driven by gas or steam turbine also called turbo generator. Its runs at high speed and its rating varies from 10MVA to 1500MVA.

EXCITATION SYSTEM FOR ALTERNATOR

Excitation means production of flux by passing current in the field winding. In these plant there are two types of system used for excitation

1) D.C system- Direct current is required to excite the field winding of the rotor of the synchronous machine. D.C is supplied to the rotor field by a dc generator called exciter. Smaller dc generator called pilot exciter. The main and the pilot exciter are mounted on the main shaft of the alternator.

2) A.C System- There are two types of exciter system. Rotating system; this has a high frequency excitation system, permanent magnet pilot exciter and uncontrolled rectifier.

COOLING SYSTEM: In this plant cooling was done in 1 & 2 unit by air. Thus closed circuit air cooled generator has shaft mounted fan and horizontal water cool air copular are mounted in the hot duct. In case of unit 3, 4 and 5 hydrogen cooling is done.

SPECIFICATION OF ALTERNATOR

Unit no 1&2 Alternator

RATED VOLTAGE 1100+-7.5%RATED CURRENT 3440ABASE MVA 37.5 MVAPHASE 3SPEED 3000RPMFREQUENCY 50HZPOWER FACTOR 0.8EXCITAION 205VOLT,408 AmpCONNECTION YYMANUFACTURED BY ENGLISH ELECTRIC

Unit no 3,4&5 Alternator

RATED VOLTAGE 1100+-7.5%

RATED CURRENT 4650/4600/4330/3940ABASE MVA 88.5/87.5/82.5/75.2 MVAPHASE 3SPEED 3000RPMFREQUENCY 50HZPOWER FACTOR 0.87/0.88/0.9EXCITAION 381/372/384/366VOLT,665/650/670/640AmpCONNECTION YYFOR H2 COOLING 1.05/1.05/0.5/0.65 KG/cm2MANUFACTURED BY SIMENS

TYPERATINGHYGROGEN PRESSUREAPARENT OUTPUTACTIVE OUTPUTRATED VOLTAGE 1100RATED CURRENT 220SPEED 3000RPMFREQUENCY 50HZPOWER FACTOR 0.8LAGGENERATOR TERMINAL 6CONNECTION YYMANUFACTURED BY SIMENS

SILICON RECTIFIER POWER UNIT:

TRANSFORMER RECTIFIER

VOLT AMP RATING(KVA)

16 CONNECTION SINGLE PHASE OPEN BRIDE CONNECTION

FREQUENCY(HZ) 50 PEAK DC VOLTAGE(V)

70000

PHASE 01 AVERADE DC TEMPERATURE

0.23

LOW VOLTAGE SIDE(V) 380 AMBIENT TEMPERATURE

60C

CURRENT(AMP) 53300 WEIGHT OF THE CASE AND FITTING

680 KG

HIGH VOLTAGE SIDE(V) 42.1 WEIGHT OF OIL 580 LTRCURRENT(AMPS) 0.3 TOTAL WEIGHT 1550KG% IMPEDENCE 5.79 MANUFACTURED

BY BHELWEIGHT OF TRANSFORMER

430

COKE OVEN PLANTDPL’s Coke Oven Complex is India’s one of the largest Merchant Cokery producing Coke of global quality. The current installed capacity of the Coke Oven Complex is 0.5 million tons of Gross Coke per annum, 20000 tons of Crude Coal Tar per annum & million NM3 of Coke Oven gas per annum.

The DPL plant has Rail/Highway/Road linkages to cities of Kolkata, Siliguri, Dhanbad & Delhi & sea port at Haldia.

The fuel used in this plant is coal. Here low grade bituminous coal low grade bituminous (calorific value – 6000 Kcal/Kg) is used. This coal is converted into coke by undergoing different process with the help of different types of 3 phase ac motors.

AC MOTOR:An AC motor is an electric driven by an alternating current (AC). It commonly consist of 2 basic parts,

1. STATOR – Having coils supplied with alternating current to produce a rotating magnetic field. The parts of stator are –A.STATOR FRAME

B. STATOR CORE

C. STATOR WINDING

2. ROTOR – attached to the o/p shaft i.e given a torque by the rotating field. In rotor has –A. ROTOR WINDING

TYPES OF AC MOTORS:

1. Squirrel cage motor: In overall shape it is a cylinder mounted on a shaft. Internally it contains longitudinal bars set into grooves & connected at both ends by shorting rings forming cage like shape.

2. Slip ring motor: A wound rotor motor is a type of inductive motor where the rotor winding are connected through slip ring to external resistances. Adjusting the resistance allows control of speed-torque characteristics of the motor. Wound -rotor motor can be started with low inrush current.

VARIOUS PARTS OF AC MOTOR: 1. Body with stator winding2. End shield drive end3. Bearing washer4. Preloading washer5. Deep groove ball bearing6. Inner bearing cover7. End shield non drive 8. Rotor9. Terminal box cover10. Rubber packing11. Terminal block assembly12. Terminal box

13. Conduit plug14. Fan15. Circlip16. Fan cowl17. Feather key for transmission element18. Feather key for fan19. Eye bold20. Connecting link

MAINTAINANCE OF INDUCTION MOTOR:

1. The bearings are pre lubricated and maintenance free. Operating condition permitting, unsealed bearings should be cleaned at intervals of about 10000 operation hours with trichloroethylene or clean petrol.

2. Balmer Lawrie LL3 and Shell-MP3 are recommended for use in motors. Mixing of grease should be avoided.

3. When the motor is opened, protect bearing from foreign particles and dirt by wrapping then with clean paper or polythene sheath.

4. During reassembly of motor ensure that wavy washer and brass washer are kept in their position and bearing cover are secured properly. This washer are esp. Designed to provide adequate preloading on the bearing.

5. Clean the entire path of the cooling air on the motor at regular intervals.

6. The temp of the motor judge by hand filling could be misleading in the case of overheating, the actual temp should measure with the thermometer and should be compared with the permissible temperature rise according to the temp class of the motors.

7. Overheating of the motor may be due to overloading of the motor, too low or too high voltages, frequency, fluctuations over greasing of bearing, foreign materials in the air gap

between stator and rotor necessary corrective action is to be taken accordingly.

8. When order in spare parts, state the motor type , machine chamber, type of construction as shown in the rating plate, parts description given in the part list and no of unit required.

INSTALLATION AND MOUNTING OF MOTORS:

1. See that the motor rotates freely by turning the shaft by hand.2. Replace the grease charge of bearing if the motor has been

stored for longer than 18 months.3. Check the insulation resistance by applying a dc voltage of

500V, if it is low due to moisture dry out the stator winding till the insulation resistance increase above 1MOHMS by any of the accepted method

4. Remove anti-corrosion coating on the shaft with petrol white spirit or kerosene, do not scrap the coating,

5. See that the machine surface of the motor fit and also the surface on which the motor is mounted is clean and perfectly in level.

6. The coupling parts to be fitted on the motor shaft are to be properly to be balanced. The bore and keyway are to be machine accurately. The recommended tolerance for the bore diameter is H7.

7. The coupling part or pulley must be carefully fitted but means ESP. Tackle for which a tapped hole is provided at shaft end. Blow must be avoided since they might damage bearing. The tackle can also be used for removal of coupling.

8. While using non flexible coupling it should be noted the shaft of the motor or the driven machine must be in perfect alignment and axis should coincides in accurate alignment result in stress on bearing and noise running

9. See the screw for fixing the motor to the foundation are secured properly.

TYPE OF MOTOR USED IN COKE OVEN SECTION

1. PUSHER CARa. LT Motor

Power rating-20kwFill load current-42 ampRPM-960Motor type-slip ring motor

b. PUSHER motorPower rating-80kwRPM -960Motor type –slip ring motor

c. LEVELER motorPower rating -20kwFull load current 42 ampRPM -960Motor type –slip ring motor

d. DOORETER motorPower rating 5.5kwFull load current -12 ampRPM- 960Motor type- squirrel cage motor

e. LIFTING motorPower rating -2.2kwMotor type –squirrel cage motor

f. LATCH motorPower rating -2.2kwMotor type –squirrel cage motor

2. QUENCHING CAR MOTOR

a) LT motorPower rating-80 KWRPM-755Motor type –slip ring motor

b) COMPOSSERPower rating-18.5kwFull load current-33ampRPM-1400 3.CHARGING CARa.LT motorPower rating-15.3kwFull load current-33ampRPM-755Motor type- slip ring motorb.TABLE motorPower rating-11kwFull load current-23ampRPM-755Motor type-squirrel cage motor

GENERATOR RATING SPECIFICATION

UNIT 1

PRIMARY EXCITER

SERIAL NUMBER :NO M25868 TGV 101/7

RATED VOLTAGE :110 VOLTS RATED CURRENT :36 AMPS POWER RATING OPERATION :4KW(FOR CONTINOUS) SPEED:3000RPM TYPE OF EXCITATION :SELF EXCITED MIN. OPERATION VOLTAGE :110 VOLTS MIN. OPERATION CURRENT :1.6 AMPS MANUFACTURED BY :SIEMENS SCHUCKERT,

GERMANY

SECONDARY EXCITER

SERIAL NUMBER:NO 25869 TGV 286/15 VOLTAGE RATING:210/240/370 VOLTS CURRENT RATING:430/490/750 AMPS POWER RATING:90/117.8/278 KW SPEED:3000 RPM TYPE OF EXCITATION: SEPERATELY EXCITED MIN.OPERATION VOLTAGE:110 VOLTS MIN.OPERATION CURRENT:11 AMPS MANUFACTURED BY:SIEMENS SCHUCKERT,

GERMANY

ALTERNATOR

SERIAL NUMBER :NO 20816 VOLTAGE RATING :6300 VOLTS CURRENT RATING :3440 AMPERES MVA RATING :37.5 MVA TYPE OF EXCITATION :SEPERATELY EXCITED SPEED :3000 RPM POWER FACTOR :0.8 STATOR WINDING :STAR MIN. OPERATION VOLTAGE :215 VOLTS MIN. OPERATION CURRENT :408 AMPERES TYPE OF COOLING :AIR COOLED MANUFACTURED BY :SIEMENS

SCHECKERT, GERMANY

UNIT 2

PRIMARY EXCITER

SERIAL NUMBE NO M25868 TGV 101/7 RATED VOLTAGE 100 VOLTS RETED CURRENT 36 AMP POWER RATING 4KW SPEED 3000 RPM TYPE OF EXCITATION SELF EXCITED MIN POERATION VOLTAGE 110 VOLTS MIN OPERATION CURRENT 1.6 AMP MANUFACTURED BY SIEMENS SCHUCKERT GERMANY

SECONDARY EXCITOR SERIAL NUMBER NO 25869 TGV 286/15 VOLTAGE RATING 210/240/370 VOLTS

(CONT. /2 MIN /10 MIN) CURRENT RATING 430/490/750 AMP

(CONT. 2/ MIN. /10 MIN) POWER RATING 90/117.8/278 KW

(CONT. /2 MIN /10 MIN) SPEED 3000 RPM TYPE OF EXCITATION SEPERATELY EXCITED MIN OPERATION VOLTAGE 110 VOLTS MIN OPERATION CURRENT 11 AMP MANUFACTURED BY SIEMENS SCHUCKERT GERMANY

ISOLATOR

TYPE OF INSTRUMENT RD 245VOLTAGE RATING 245 VOLTB.I.L(kpv) 1050VOLTSSTC KA/TIME/Kamp 40/3 SEC/100MOTOR VOLTAGE 415 VOLTTYPES OF DRIVER MOTORWEIGHT OF DISC 900 KG (Approx.)FREQUENCY USED 50HzCURRENT FLOW 1250 AMPCONTROL VOLTAGE 220VOLT

CONCLUSIONWe have obtained lots of experiences from this industrial training at DPL. We have got one month exposure in this industry. This exposure helped in gaining practical experience what we have actually seen in

the industry. We could use the theoretical knowledge in the practical field i.e., at DPL.

We had assured them that confidentiality will be maintained in all respect and not information will be documented for any purposes except completing the course curriculum.

We have realised that there is an utmost need of an industrial social worker in this industrial belt.