Difference between low impedance and high impedance Restricted Earth Fault

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please tell me how a surge protector work on a DC 48Volt.? please describe briefly.

0 Answers  

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5MVA TRANSFORMER SUDDENLY FAIL WITH THE PRV TRIPPING AND LARGE AMOUNT OF OIL SPREAD OUT? SO IT CAME BACK WITH THE REPAIRING WITH REASON THAT IT FAILS BCOZ OF TRANSIENT EFFECT? SO PLZ EXPLAIN HOW DOES IT HAPPENED?

1 Answers  

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Diff between Earthed & Unearthed cable ?

1 Answers   Torrent Pharma,

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What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

3 Answers   Areva,

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What is the concept of voltage & current its relation?

5 Answers  

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If one 10 Hp 3phase induction motor connected in 380volt 50Hz. and again its connected to 380volt 60Hz. howmuch currrent and power take on both time?????

1 Answers  

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

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We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.

0 Answers  

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Wheather there exist any dc transformer

6 Answers  

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Interchange 7 and 6 ,÷and× 36×7+4-7×3

1 Answers  

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what is difference between 3.5 core and 4 core cable

5 Answers   Havells,

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