Answer / lalit barsker

vacuum circuit breaker is a device which is used to isolate
the faulty part of the power system from healthy part of the
power system & is used in switchgear.WHEN WE WANT TO SERVICE
OR MAINTEINANCE OF ANY SUBSTATION OR WANT TO CLEAR THE FAULT
DURING THAT CONDITION WE CAN ISOLATE THAT PART OF POWER
SYSTEM SO THAT WE CAN WORK IN THAT CONDITION ISOLATOR IS
OPEN AND SUPPLY CAN BE INTERRUPTED.

Answer / purushotham naidu.

Vaccum circuit breaker,as the name indicates is used to
break the circuit in faulty conditions and Arc quenching
medium is Vaccum. Isolator, as the name indicates isolates
the part of the system on occurence of fault without
actually being quenching/interrupting the arc....

Answer / mahesh m

The vaccum c.b are used to dissconnect the ckt when fault
accurse in the ckt,aswell as the vcb is used to break the
ckt in abnormall condition,in tn the name indicates the
isolators are used to isolates the ckt and the supply can
be intterupted by the mains.

Answer / ramakishore karri

the purpose of the vacuum circuit breaker is to isolate the fault system after the occurance of the fault. So that circuit breaker contacts open, in case of isolator it isolate the power for maintenance of the sub station as u like depends on us and it should not require any relay for finding the type of fault and interrupt the supply. In case of circuit breaker relay is required for finding the type of fault and it interrupt the circuit breaker.

what is acceptance test in electrical engineering.

0 Answers   ABB,

---

what is the difference between single phase, 2 phase, and 3 phase in electric meter?

1 Answers  

---

what is the constructional difference in generator if we want to genearate 6.6kv instead of 440v?

1 Answers   Anglo Eastern,

---

Why in DC drive u r using in Klin operation in Cement Plant?

7 Answers  

---

can any one tell me the formula to select the thickness of wire selection according to ampere rating

2 Answers  

---

---

how can i get the formula to find out the cable size if i know the load of main fuse protection.

0 Answers  

---

WHAT HAPPENS IN DIFFERENTIAL PROTECTION IF CT REACHES ITS KNEE VOLTAGE POINT?

4 Answers   Jindal,

---

in 3 phase induction motor resistance value is how much

1 Answers  

---

Define phase lag and phase lead?

0 Answers  

---

sir i want previous entrance exam papers for written test

0 Answers   Vizag Steel,

---

what is the CT & PT. where is it uses.what is the using that plese kindly answer me...?

4 Answers   Cap Gemini, JLL,

---

If Polarization index of motor 8.75 at 500volts of medium voltage 4.16 KV motor what this mean winding good or bad pl answer if any reffrence book give me the link

0 Answers   Marafiq,

---