State the other types of Air Conditioners?

0 Answers   HSL,

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What is on delay and off delay timers

1 Answers   NCC,

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why buchholz relay is kept on inclined position and why it is cover??

1 Answers   GSECL,

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . please reply..............

9 Answers   NTPC,

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

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what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?

0 Answers  

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what is the difference between interconnection and intraconnections in the circuit diagrams

0 Answers   NTPC,

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how can you calculate fault level ?

0 Answers  

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please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula

0 Answers   Foxconn,

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can any one help me out by posting something related to rvnl interview for site engineer electrical.? what is the procedure? what kinda question they ask us? how long the interview goes? and any tips? and any thing you want to share?

0 Answers  

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what kinds of Transformer oil grade is better for power transformer ?

0 Answers   KSRM Steel Plant,

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what is working parincipal of a ht transformer

0 Answers   Pidilite,

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