Answer / thran

Mcb & mccb difference are that breakers breaking capacity only... mcb is 10 KA and mccb is 30 KA...

Answer / tharan

difference between for breaker breaking capacity only...( shor circuit curent value only diference)

Answer / dinesh chaudhary

mcb is used for less load while mccb is used when the load
capacity increases i.e. for less current ratings we use mcb
& for high current ratings we use mccb

Answer / ab

mcb only carry 6- 63A then current rating above 100A we use MCCB so sHORT ct only difference

what is the difference between ac and dc?

1 Answers  

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Difference between copper earthing & aluminium earthing?

2 Answers  

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How to determine the Power factor is Leading,Lagging & Unity ?.I don'thave any Meters.

3 Answers  

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When One Phase PT Missing (voltage drop ) this time current is zero of This phase(PT Missing Phase) and current is Not Zero of other Phase but PF is always Low That Why

0 Answers   HCL,

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1)why the transformer rating in KVA insted of KW 2)why the secondary of ct is shorted and why the PT secondary is open

3 Answers  

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Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.

0 Answers  

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why d.c produces corrosion

0 Answers  

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What is Load commutation and how it is done?Cite some example where this type of commutation is used

2 Answers   NTPC,

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when an induction motor runs on load.at that time if we reduce the supply voltage the current increases.But when it runs without load,if we reduce the supply voltage the current also reduced.why?.i checked it practically also.

1 Answers   Birla,

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how to calculate the voltage drop in electrical cable while laying cables?

2 Answers  

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whay is snubber circuit , why we are using snubber circuit in thyristor

1 Answers   NEPC,

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how the harmonics are generated in transforemer?

5 Answers   IFFCO,

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