Answer / bhanu

change over switch, which is used to change the source of
power, there are four connection points( terminals) in a
change over switch,Example:- you can connect DG power &
board power as input terminals then connect output
terminals to the load ( just like two switches inter
connected by mechanically or electrically, at a time one
switch will ON & other is in OFF position)
Switch disconnector/ switch disconnector fuse unit :- in
old days the main switches( SFU- Switch fuse unit) out put
terminals& fuses are mechanically connected when switch is
in OFF position but in SDF/SD when the switch is OFF
position there is no any connection between input/ out put
terminals & fuses.
Bypass switch - it is just like an ON/OFF switch , if any
auto linked circuit connections are failure you can use a
switch to make the circuit complete.

when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?

0 Answers  

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what is power

6 Answers   ABB,

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i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.

1 Answers  

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why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer.

12 Answers   ABB, Adani, Central Electricals, Electrical, HCL,

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How to set the relay,,??

0 Answers   Megatron Solutions, Nestle,

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What is mean by vector group? For what purposes we doing vector group test in transformers?

2 Answers  

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can i use the six sigma method which is used in management area, in state estimation of power systems?

0 Answers  

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WHAT IS DGA TEST FOR THE TRANSFORMERS.

3 Answers   ABB,

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WHAT IS EDDY CURRENT LOSSES AND SKIN EFFECT LOSSES IN ELECTRICAL ENGINEERING

1 Answers   GAS,

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what is inductance function?

3 Answers  

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what happens if we earth negative electrode of an rectifier transformer used in ESP. In which normaly positive is earthd from inside the xmer.

1 Answers  

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operation of protection relay watchdog contact?

0 Answers   L&T,

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