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

In secondary transmission i.e., in distribution side, supply for homes are connected through different phases in order to balance the 3 phase load. But in practical we saw nearby house doesn't have power due to single phasing. But other two phases give supply. How it's possible? it doesn't make "single phasing"?

1 Answers  

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why the colour of insultor stack , petticoat is brown. Is it has some technical reason.

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what is the formula for calculation of sac?

4 Answers   TCS,

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in a transmission line the aluminium cor is sarrounded and in between there is a another type of matrial what is that?

7 Answers  

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why 2 phase is used in argc furnace? why 6 phase is used in converting machinery?

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why dc supply given to ac alternator rotor

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CAN 50Hz transformer work at 60 Hz power supply? if yes how it is possible?

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why capacitor using the induction motor?

6 Answers   Kirloskar,

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What was the Dg set radiator and lube oil temperatures trip in ACB

0 Answers   Gland Pharma,

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What is the basic principle of welding process?

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Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?

0 Answers  

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why 120 devided with pole and speed multiplication to determine frequency

1 Answers  

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