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LOCATION WHERE BHEL IS

WHAT IS BHEL

HISTORY OF BHEL

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FIRST PLANT AT BHOPAL IN 1956

IN HARIDWAR

IN HYDERABAD

IN TIRUCHIRAPPALLI

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COMES UNDER UTTARAKHAND STATE

LOCATED NEAR HARIDWAR

SITUATED IN RANIPUR AREA

HILLS AREA & PEACEFULL ENVIRONMENT

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BHEL STANDS FOR “BHARAT HEAVY ELECTRICALS LIMITED”.

BHEL IS A PUBLIC SECTOR ENTERPRISE

BHEL COMES WITHIN ‘NAVRATNA’ COMPANIES AFTER 1997.

BHEL IS ONLY ONE COMPANY TO MAKE SIMULATORS FOR P0WER PLANTS,DEFENSE& OTHER APPLICATION

BHEL OFFERD RENEWABLE ENERGY SOURCE LIKE WIND ELECTRIC GENERATOR SOLAR PHOTOVALTAIC SYSTEM, SOLER LANTENS etc.

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THE FIRST PLANT OF BHEL WAS SETUP AT BHOPAL IN 1956. BHEL POWER GENRATION TROUGH THERMAL , GAS , HYDRO & NUCLEAR POWER PLANT IS 65% OF THE TOTAL CAPICITY IN THE COUNTRY. THAT IS IT GENERATES 64737MW ACCORDING TO MARCH 2001WHILE TOTAL CAPICITY OF COUNTORY IN MARCH 2001 WAS 99146. BHEL PROVIDES1000MW UNIT RATING THERMAL SETS, 240MW GAS TURBINE GEERATOR & 235 TO 500 MW NUCLEAR TURBINE GEERATOR.THIS COMPANY IS THE MAJAR PRODUCER OF LARGER SIZE THYRISTOR DEVICES.BHEL HAS ATTAINED ISO9000 CERTIFICATION FOR QUALITY MANAGEMENT &ISO 14001 CERTIFICATION FOR EVIRONMENT MANAGEMENT.

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POWER GENERATION POWER TRANSMISSION & DISTRIBUTON. TRASPORTATION TELECOMMUNICATION DEFENCE

HUMAN RESOURCE DEVELOPMENT INSTITUTE & OTHER H.R.D. CENTERS OF THE COMPANY HELPS IN NOT ONLY KEEPING THEIR SKILLS BUT ALSO ADDING NEW SKILLS WHICH LEADS ENHANCED PRODUCTIVITY & HIGHER LEVEL OF QUALITY

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Today, BHEL has 13 manufacturing divisions, 8 service centers and 4 Power Sector Regional Centers, in addition to over 150 project sites spread all over India and even abroad to provide prompt and effective service to customers.

2 important manufacturing units of BHEL are located viz. Heavy ElectricalEquipment Plant (HEEP) & Central Foundry Forge Plant (CFFP).

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GLOBEL COMPECT IS THE PARTICIPATION B/W UNITED NATION , BUSINESS COMMUNITY & INTERNATIONAL LABOUR WHICH DEALS WITH..1.HUMAN RIGHTS2.LABOUR STANDARDS3.ENVIRONMENT

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1. TO BECOME WORLD CLASS ENGINEERING INTERPRISE2. TO SATISFY CUSTOMER NEEDS

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1. INTRODUCTION TO COMMUNICATION

2. INTRODUCTION TO TELECOMMUNICATION

3. ELECTRONIC EXCHANGES

4. TELEPHONE LINES

5. CONNECTION TYPE

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COMMUNICATION IS A PROCESS OF SHARING INFORMATION B/W TRANSMITTER & RECEIVER

COMMUNICATION IS THE NECESSITY OF EACH HUMAN BEING TO BE CONNECTED WITH EACH OTHER

TELEPHONES IS THE RAPIDLY BECOMING TOOL FOR THIS PURPOSE

SOURCE

RECEIVER

I/P TRANSDUCER

O/P TANSDUCER

TRASMITTER

CHEN

EL NO

ISE

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DIFFERENT COMMUNICATION EQUIPMENTS ASSEMBELD TOGETHER TO FORM C. S.

SOME EXAMPLE OF C.S.-1. LINE TELEPHONY & LINE TELEGRAPHY2. RADIO TELEPHONY & RADIO TELEGRAPHY 3. RADIO BROADCASTING4. MOBILE COMMUNICATION5. COMPUTER COMMUNICATION6. RADAR COMM.7. TELEVISION BROADCASTING8. RADIO AIDS TO AIRCRAFT LANDING e.t.c.

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ON THE BASES OF CHANNEL…

1.LINE COMM.

2. WIRELESS OR RADIO COMM.

ON THE BASIS OF SIGNAL

1. ANALOG COMM.

2. DIGITAL COMM.

TELEPHONE

COAXIAL CABLE

OPTICAL FIBER

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TELECOMM. IS A FAR COMMUNICATION PROCESS IN WHICH MODULATION OF MESSAGE IS REQUIRED.

TELECOMMUNICATION IS BASICALY COMMUNICATION DONE THROUGH TELEPHONES

IMP. TERMS-

CALLING SUBSCRIBER---- WHO MAKES CALL CALLED SUBSCRIBER---- WHO RECEIVE CALL

TYPES OF TELEPHONY SYSTEM-

1. AOTOMATIC TELEPHONY SYSTEM 2. MANUAL TELEPHONY SYSTEM

A.T.S. ARE USED NOW A DAYS MORE THAN M.T.S.

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IN AUTOMATIC TELEPHONY , OPERATOR ARE NOT REQUIRED TO ESTABLISH CONNECTION MANUALLY B/W THE DIFFERENT CALLING & CALLED SUBSCRIBERS.

IN THIS CALLING SUBS. ESTABLISH REQUIRED CONNECTION BY OPETRATING THE DIFFERENT SWITHS AT THE CENTRAL PLACE KNOWN AS THE EXCHANGE.

ADVANTAGES— 1.HIGHER LEVEL OF SECRECY 2. MINIMUM POSSIBILITY OF THE CALL BEING MISMATCHEDISADVANTAGES OF MANUAL TELEPHONY— 1. MORE TIME CONSUMPTION 2. HIGHETR MAINTENANCE 3. MAX MISMATCHING OF CALLS

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1. DIAL TONE –WHEN HANDSET IS PICKED UP FROM THE CRADLE THIS TONE HEARED IF A FREE LINE IS AVAILABLE.THIS TONE IS A CONTINUOS BURBLE SOUND OF 400Hz MODULATED BY 25 Hz.

2. BUSY TONE-CALLED SUBSCRIBER ENGAGED WITH OTHER CALL. THIS TONE IS A CONTINUOS OF 400Hz, GENERALLY ON FOR 0.75 sec& OF FOR 0.75s.

3. RINGING TONE-THIS TONE IS A CONTINUOS BURBLE SOUND OF 400Hz MODULATED BY 25 Hz.

4. NUMBER UNOBTAINED TONE- DIALED NUMBER CONNECTION NOT PRESENT IN EXCHANGE

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1. TONE TYPE- 1. SINE WAVE ARE USED 2. DIALING SPEED IS MORE

2. PULSE TYPE- 1. SQUARE WAVE IS USED 2. DIALING SPEED IS LESSER

BOTH TYPE ARE INTEGRATED IN A SINGLE MACHINE

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SLOTS [0 TO 27]R-0

R-1

RACK

R-0

R-1

RACK

MDF

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1.) LDTL-8 (15)2.) INTOF (6)3.) ATR 2 (3)4.) CPU 3 (2)5.) SUVG (1)6.) PCM 2 (2)7.) MMSFD (1)8.) GPA-1 (1)9.) UA 32 (3)- DIGITAL CARD

10.) NDDI (8)- JUNCTION CARD11.) Z 24 (30)- ANALOG CARD

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FROM TELEPHONE EXCHANGE TWO WIRES OR CONNECTION RUN FOR EACH NUMBER, IN WHICH ONE IS NEUTRAL AND OTHER IS MAIN OR POSITIVE

TELEPHONE EXCHANGE SUPPLIES 40-60 VOLT DC TO OPERATE THIS CKT

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0 52701 52712 52723 52734 5274 5 52756 52767 52778 52789 527910 5280. .. .. .. .. .. .23 5293

FOR RACK/SLOT - 1 / 3

IF PHONE NO 5273 HAVE TO CHECK THEN WE CHECK R.-1S. -3 &PORT NO.-3

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INTERNAL CABELS OF SUITABLE CONDUCTOR B/W FOLLOWING STAGES ARE NECESSARY-

1.HANDSET TO EXCHANGE’s CABLE CHAMBER2.CABLE CHAMBER TO M.D.F.3.M.D.F. TO I.D.F.4.I.D.F. TO NUMBER BLOCK5. NUMBER BLOCK TO EXCHANGE EQUIPMENT6.B/W TWO EXCHANGES7.B/W TWO CITIES8.B/W TWO COUNTRIES

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I.II.D.F.

LINE CARDS LINE NO. BLOCK

TO M.D.F.

WHEN CORRESPONDING NO. OF LINE CARD IS FREE THEN RINGER SECTION GENERATES A SIGNAL CALLED TONE

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1. RINGING SECTION-TILL THE HANDSET IS ON HOOK THE RINGING SECTION IS ON THROUGH TELEPHONE LINE

2. DIALING & SPEECH SECTION-ON LIFTING THE HANDSET THE DIAL TONE IS RECEIVED WHICH AMPLIFIED BY THE AMPLIFIER OF SPEECH SECTION

3. BILLING METER SECTION-WHEN CALLED SUBSCRIBER PICKS UP THE HANDSET THE BILLING METER BECOMES ACTIVE

4. PULSE COUNTER & CONVERTER SECTION- COUNTER COUNT THE PULSE &CONVERT THEM INTO CALLS

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IN TELEPHONE DIALING TWO TYPE OF FREQUERNCIES IARE USED

1.HIGH BAND FREQUENCY (1216Hz TO1245Hz ) THE NUMBER FROM 6 TO 9 & 0 FALLS IN HIGH BAND

2.LOW BAND FREQUENCY (701 Hz TO 936 Hz) THE NUMBER 1 TO 5 FALLS IN LOW BAND

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1. 40 TO 60 VOLT DC ALWAYS REMAIN IN NORMAL TELEPHONE LINE

2. 9 TO 12 VOLT WHEN HANDSET IS PICKED UP

3. 75 TO 110 VOLT DC AT THE INSTANT OF RINGING SIGNAL

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1. PICK UP HANDSET &DIAL TONE IS HEARED

2. DIAL A NO.

3. CHECKING OF CALLED SUBSCRIBER LINE WHETHER IT IS FREE OR NOT 4. IF LINE IS FREE THEN RINGING PULSE IS SEND TO THE CALLED PARTY

5. WHEN CALLING PARTY PICKS UP THE HAND -SET THE BILLING METER BECOMES ACTIVE

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TREE TYPES OF TELEPHONE LINE1. MAX LINE- FOR INTERNAL COMMUNICATION LINK IN BHEL

2. PABX-USED FOR BOTH INTERNAL & EXTERNAL COMMUNICATION LINK IN BHEL

3. DOT LINE- THESE LINE ARE DIRECT TELEPHONE LINE

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