Answer / pillay

It is armoured.to arm is to protect against harm. So
armoured cable is cable with some kind of protection like
steel wire, copper tape, lead covered, pvc, xlpe, or steel
conduit or some other type.In unarmoured cables it is
unprotected cables other than electrical insulation.Than the
user decides to provide the necessary mechanical protection
as necessary.

is it ok to switch lights from a mcb instead of switches

5 Answers  

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why the neutral point is zero in star connection?

4 Answers  

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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?

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In my power station 220 volts dc battery set. they coneected 84th cell taped

1 Answers   KPTCL,

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what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?

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In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

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hi all i like to know vat is power plot in control systems also i want to know abt latest trends in electrical & electronics

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if 20 hp motor starts directly stars and contenious run . what will be the effect.

11 Answers   HP, Ohsung Electronics,

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Why do we use copper cable for HT Supply and why not Aluminium?

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What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

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What is the difference between MPCB and OLR?

11 Answers   ABB, Raj Agencies,

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What is meant by celling voltage & current in excitor ?

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