why making capacity is more than breaking capacity?
- 14 Answers
- 31355 Views
- Essar, Indo Asian, Infinity, I also Faced
- E-Mail Answers
Answer Posted / borys nijinski
The breaking capacity is less than make because make does
not require the arc to be extinguished. When the contacts
open, with current flowing, there is an arc created and
that arc needs to be extinguished. Extinguishing the arc
can be achieved by lengthening the arc (arc chute and air
puffer) or through an environment that does maskes the
creation of arcs difficult (eg SF6). AC arcs are much
easier to extinguish because the voltage passes through 0;
DC arcs are much harder to extinguish which is evidenced by
the lower rating of break capacity with DC as opposed to AC
for the same contactor/breaker.
| Is This Answer Correct ? | 3 Yes | 5 No |
Post New Answer View All Answers
whats the existence of reactive power and when it arises?
What is difference between isolator and circuit breaker?
We have a couple of oil tanks at our plant. One of them does not have a lightning arrester installed. My question is it necessary to install an arrestor on every tank or will this particular one be covered by the arrestor installed on the ajdacent tank, Since all the tanks are close to each other. Basically, I want to know that if these arrestors or protection works in a parituclar area of effect or influence. Thanks
What is the safety of UPS?
A low wet bulb temperature indicates
IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?
what questions will be asked for 11/33KV licence interview APSEB hyderabad. Can any one share question and answers.
in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain
what is the difference between neutral and earth
how can we design robots
what is the principle of operation of tungstun bulb ??
while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?
HOW TO CALCULATE HV CABLE SIZING?
WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.
what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????
