TED (10)-5037

(Rr-rvrsroN -- 2010)

Reg. No.

Signature

SIXTI] SEMESTER DIPLOMA EXAMINATION IN ELECTRICAL ANDELECTRONICS ENGINEERING - OCTOBER. 2016

ELECTRIC TRACTION

lTime :3 hours

(Maximum marks : 100)

PAR| _. A(Maximum mmks : l0)

Marks

I Answer the following questions in one or two sentences- Each question carries2 marks.

l. Nam.e the major equipments used in substation for taction system.

2. what are the various overhead line equipments of electic traction ?

3. Justify the use of mimic diagrarn.

4. List the different types of signals.

5. Write the of signaling system. (5x2=10)

PART _- B

Maximum marks : 30)

II Answer any five of the following questions. Each question carries 6 marks.

1. Explain hansformer protection used in traction system.

2. Draw the line diagrarn of feeding post in substation.

3. Describe the composition of OHE.

4. What is mean by neutal section ?

5. Explain the bow type ctrnent collector in OHE.

6. What are the advantages of colour ligfrt signals ?

7. Write the advantages of end on generation system. (5x6=30)

l2s1) Ir.r.o.

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PART -_ C(Maximum marks : 60) '

(Answer one full question from each unit. Each full question canies 15 marks.)

UNrr - I

III (a) Explain sectioning and paralleling post arrangement in naction system. 8

(b) Explain the difference between oircuit breaker and intemrpter used in substation. 7

On

(a) What are the miscellaneous equipments used at switching substations ?

(b) Draw the line diagram of traction substation and explain.

Uxrr - II

(a) Describe the ditference between insulated overlap and uninsulated overlap

in OHE.

(b) Explain the maintenance schedule for OFIE.

On

IV

Marks

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VI (a) Write short notes on :

(i) AnticreeP(iii) Encumbrances

(ii) Spanlenglh

(iv) Catenary wire

(b) Describe automatic weight tension and temperature compensation in OHE.

UNrr - III

VII (a) Explain the systems of conductor rail system in electric traction.

(b) Explain diamond type of pantographs used in OHE.

On

VIII (a) Describe the methods of rising and lowering of pantogaphs.

(b) Explain the different types of cunent collectors in OHE.

UNII - IV

(a) Explain the air conditioning installations used in railway coach.

(b) Explain with aid of diagram the working of single battery system.

On

(a) Explain DC track circuit and AC hack circuit.

(b) What are the requirements of railway coach air conditioning.

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