Answer / murali

thumb rule 1KV we get 1Mohm. if suppose 415V motor we get 0.45Mohm.

Megger is the instrument name. it is insulation resistance value.

Answer / pradyumna171

megger value of any appleance should be 2 multiply with working voltage in kv plus 1 ie a 440 volt motor should have 1.88Mohm (2* .440 +1) , it is the minimum value. And megger voltage should be twice of working voltage of appleance.

What is a Phase shift meter? Where can I get one?

0 Answers  

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What is the role of the 50 STUB protection at a GIS 400KV substation with SIEMENS protection relays?

0 Answers   Power Plant,

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Application of statically induced emf

0 Answers  

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why doesnt the back emf hold the speed of unloaded series motor?

1 Answers  

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What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?

0 Answers   HPCL,

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How to know motor winding is star or delta connected without see the information table and winding connection ?

5 Answers   NTPC,

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What is the rating of HT SUBSTATION and LT SUBSTATION?

11 Answers   NTPC, Sail,

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what is purpose of manual bybass in ups

3 Answers  

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What is the difference between line Distance protection and Line Earth Fault Protection?

1 Answers  

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what is the differencce inn series and cascade connection??

0 Answers  

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what need of NGR(neutral grounding registor)? What it works?

2 Answers  

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what is the formula for backup time of online ups?

1 Answers  

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