Answer / samiran bairagya

Following are the advantages of Live Tank over dead Tank :
a) The Primary conductor is short than (in live tank CT) than the Dead tank CT which gives better Rigidity and gives high short circuit current withstanding capability and reliability.
b) Primary winding is uniformly distributed around Core, Hence CT is truly low reactance type, which has inherent better transient performance.
c) Due to shorter length and the tank being live the major insulation is not over the high current carrying primary, which is the main source of heat (as in the case of Dead tank type design.) the insulation does not get heated up while dissipating the heat generated. This facilitates much superior thermal stability of insulation and longer life

Answer / mukesh singhal

Voilent failure of dead tank CT's results in consequential damage of nearby equipments and fire in close visinity in ground.

why C.T protection required for H.T.lines?

4 Answers  

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How to increase the backup of three phase ups?

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A separately excited dc motor having 2 ohm armature resistsance draws a current of 10A and torque developed is 20 Nm under rated field condtion. the speed of the motor under the rated field condtion , when it is connected to a 100V DC source and delivering 10Nm torque....

2 Answers   DRDO,

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We say that if voltage in a power system is increased,for a constant power the current will decrease (by P=VI). isn't this in disagreement with the ohms law(I propotional V;resistant const.).Since the resistance of transmission lines remains constant,shouldn't inc in voltage cause inc in current across the transmission line? I have read many articles across the net but still couldn't this figure this out. :( Guyz plz assist me with dis..:)..

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sir i have applied for isro-09. still i did not got the HALL TICKET.

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how dc ct works?

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if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

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How to specific gravity of battery will check, i didnt saw any hydrometer. & say me how to dip into the battery what are the specifications are given in the hydrometer?

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3 measuring instrument for transformers?

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what is ACB and its function?

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Necessity of transformer earthing

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i have 28/32 MVA power transformer with 11/6.6 KC voltage rating and 12%impedance.it have star connection at both side.but it have another thied winding tertiary winding.what is used of this winding. pl tell me

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