Answer / krishnappan

in switchyard first our earth switch should be open.
after that close the bus isolator,then line isolator.
finally close the circuit breaker

Answer / sandeep

in case of maintainance first open the circuit breaker then
open the isolator then close the earthing switch
and while charging the line do exact reverse i.e. open
earthing switch first then close isolator then finally
close circuit breaker.

a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

0 Answers  

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what will hapen if we give ac supply to dc motor?

2 Answers  

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What are thermo couple cables and where they are used.

2 Answers  

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can we use HPSV LAMP in HPMV LAMP fixture ?and viseversa.

5 Answers   OPS,

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If load is 240 kw & pf is 0.8 lagging, than how to increase it from0.8 to 1.0(unit),which rating capacitor used, please give me Calculation. What is effact of consumer & suplier if pf is lagging or leading with on effect machines/ TF/GE etc.

6 Answers   L&T,

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why current flow to the opposite direction of flow of electrons???????????

0 Answers   Bhel,

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how to test reverse power trip?

0 Answers  

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why capacitor burst?

2 Answers  

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dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

0 Answers  

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The slip during plugging operation is given by= A 1-s B 2+s C 1+s D 2-s

0 Answers  

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what is the principle of synchronous motors?

3 Answers   The Grand,

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What is the difference between Static and servo controlled voltage stablizer?

0 Answers   Voltamp,

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