Answer / snowwhite10

isolator is a knife switch and it is used to open a circuit
under no load.such switches are used in the both sides of
the circuit breakers so that repair and replacement of the
circuit breakers could be done.they are never opened when
current is flowing in the line.....

circuit breaker is an equipmnet which can make or break
contacts under load ,no load or fault conditionsrelay is
always used with circuit breaker ..relay detects the fault
and circuit breakers does the function of current interruption..

Answer / boozzoo

1.)isolator works only at no load,if operated on load there wil b dangerous sparking....whereas ckt breaker wrk on load as well
2.)isolator doesnt have any arc quenching mechanism unlike ckt brkr which have many means oil vaccuum etc

Answer / kundanmalani1990

Isolater work as a switch.and not to clear to fault condition.only no load opration means cb to maintance so the use to the isotater and cb are use to the disconnect to the faulty section.

Why we use parllel operation of alternator

1 Answers  

---

wat is the difference between real power and reactive power..which is useful..?and how it s useful..wat is the effect of these on a power system...

10 Answers   ABB,

---

if a 3 point starter is not available, how can a dc motor be started?

3 Answers   Accenture, BIT, Techno Solutions,

---

what is the meaning of WYE and DELTA in Electric meter?

0 Answers  

---

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

0 Answers  

---

Which of the following can be operated at higher frequencies ? -SCR -MOSFET -IGBT

4 Answers  

---

why we use battery source for current transformer polarity testing?

2 Answers  

---

What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

2 Answers  

---

In sub-station how to find multifactor of panel?

1 Answers  

---

how to maintain standard votage in power system?

5 Answers  

---

What is the difference between Earthing and Neutral?

13 Answers  

---

If not maintained 3 phase clearance,what happened ?

2 Answers  

---