why vaccum circuit breakers are preferred over m.o.c.b

Question Posted / anurag_jammed@yahoo.co.in

2 Answers
4808 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why vaccum circuit breakers are preferred over m.o.c.b..

Answer / k.prakashchandra

To name a few. 1.No need to replace oil 2.O & C Mechanism is
very simple 3.Carriage is lighter

Is This Answer Correct ?

2 Yes

0 No

why vaccum circuit breakers are preferred over m.o.c.b..

Answer / swetha

MOCB contains oil which expands and contracts during working which may create vacuum/gases inside the circuit breaker which may lead to an explosion sometimes if proper care is not taken.They also require a cooling system. Moreover, these circuit breakers require proper maintenance like changing the oil, taking proper predictive maintenance etc. But in the case of VCB's they don't require any maintenance, exhibit high arc quenching property, offer good amount of cooling. Hence, VCB's are mostly preferred.

Is This Answer Correct ?

2 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

we can stepdown the voltage from 230/12v ,and we use the voltage for various electronics components why can't we step up the voltage from 12/230v if we can shall we use the voltage for domestic single phase supply

5 Answers Areva,

Why consider motor rpm to select capacitor for motor

1 Answers KSEB,

What is the unit of attenuation?

0 Answers

sir, iam ramya.... from the discipline of E.E.E appearing for jindal exam .sir, could you please send me the modal papers of recent jindal steel exam.

1 Answers

Is it reuired to use house service barcket for 31/2 core 300 Sq.mm cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

1 Answers HAL,

i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.

1 Answers

what is slip?

3 Answers

how we can varying the speed of dc motor ?

6 Answers

What is stray looses?

2 Answers

IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM

0 Answers

why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor

1 Answers Vedanta,

Fantio of tranformer

0 Answers Tenon,

For more Electrical Engineering Interview Questions Click Here