Answer / makku

Because of the construction of the transformer core/winding assembly, there can be high potentials induced into the core, causing partial discharges which will damage the transformer. The core ground diverts this voltage safely to ground. The core ground also provides a low-resistance path to ground if there is a short circuit between the winding and the core, allowing protective relaying to detect it. The core ground may be brought out to a separate, external bushing or it may be connected internally, with cost being the driving factor as to its location. As it is with most investments, you get what you pay for.

Answer / mohd fazil

for the core to acquire charges to get into a potential which may cause insulation failure between the leads of the transformer to the core so the core is earthed in ...

Answer / kayode

In order to complete a circuit of flowing curent, cause curent is directly propotinal to power and inversely propotional to voltage

explain the application of reciprocity theorom

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can any tell me why slope 40% and 80% is calculated in differential protection?

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What is the purpose of stand by earth fault protection for transformer ?

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When we give supply to a transformer 11 kv and we get 415v from it, so when we give supply to same transformer 415v on ht side what we get? and When we gives supply to any transformer to L.T. side 415v or 220v What supply is on H.T. side?

2 Answers   Ashoka Electricals,

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in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.

1 Answers  

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What's the difference between a generator using 50Hz and 60Hz? When do we need to use a generator 50Hz and 60Hz?

3 Answers  

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How supply comes to your home?

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what is the pre commissioning test to be carried out on LT power panel at site?

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What is the difference between ARC & SPARK?

4 Answers   OPTCL,

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When lag/lead/lag-lead compensation is employed?

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hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?

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Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,

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