Answer / ashraf nasr

mcb ' miniture circuit breaker' installed at the final
distribution circuits - as close as can be to loads - in
order to protect loads

mccb ' molded case cicruit breaker' used as a main breaker
for branches . it has higher rupture capacity

acb 'air circuit breaker' used as a main breaker for the
whole network - on the head of the transformer- since it
provide releabilty for its slow opertaion

vcb ' vaccum circuit breaker' it only differs due to the
damping meduie and its used in distributors

How to prepare electrical preventive maintenance plan & shedule of machine tools in manufacturing unit.

0 Answers   DRJ ARDE,

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What are dcs and plc?

0 Answers  

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In power point wiring,often,we use less size of earth wire compared to phase & neutral wire and we use big size pin in pug top. how is it justified? can we use small size cable for earthing?

3 Answers   HAL,

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along with technical test papers

0 Answers   Vee Technologies,

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how the arcing is made in ac electric arc furnace? ( between the three electrodes in any sequences or between the electrode & the charge(steel))

1 Answers  

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wat is the criteria we use the diff. relay ?

2 Answers  

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What is the minimum setting in REF relay because i am facing some problem whenever power resumes after power failure my transformer is tripping because of REF trip. I am using CSPC make numerical relay(DIP switches). Now setting is 15 percentage. What is the reason for this triping. I sm waiting for answer

2 Answers  

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i have one source transformer with the capacity of 50KVA, connected with two loads 10kw and second one is 15kw.. how can i calculate first load in KVA and second one in KVA .. because Kva rating, power factor rating of of transformer is different from the load… there must be some way to calculate load KVA rating and power factor….

1 Answers  

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why neutral busbar size is SAME of the phase busbar size UPTO 200A IN LT PANELS

1 Answers   IBS,

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in dc shunt motor if armature wdg is open then

1 Answers  

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what is the load amp of a 2 hp single phase motor?

6 Answers  

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meaning of two lines in between the transformer single line diagram??

3 Answers  

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