Answer / angana majumder

we know circuit breakers are used for mainly for switching
and current interrupting device.this particular cb uses the
gas sulphur hexafluride gas as for arc quenching formed
during short circuit.thus the current is interupted without
the risk or fire.

Answer / rajib

sf6 circuit breaker are used for heavy transmission line as
a protective device.sf6 gas bear high dray electric
character so that it can prevent arc during
operation.normally its bear 2.8kg/cm gas pressure.but at
operation time 16.8g/cm gas pressure come from gas reserves
tank and prevent arc.

If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines

1 Answers  

---

What is the formulae of Megger value for a A.C.Motor

1 Answers  

---

What are the types of piano switches?

1 Answers  

---

How to Calculate KA Rating of Main LT Panel

1 Answers  

---

Can anyone explain about Control and power circuits of star delta starter & DOL starter ? How it works? please!

1 Answers  

---

actual rated capacity of a disc insulator??

5 Answers   OPTCL,

---

what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.

1 Answers  

---

What happens when DC supply is given to transformer

4 Answers   CESC, IBM,

---

What happened when a three phase induction motor work on two phase supply.9

6 Answers  

---

what is photo voltic cell,& what are the materials associated with that?and any spcifications like volts/cm etc?

1 Answers  

---

why distribution transformer are of DY11 type?

4 Answers  

---

What is the cause for a blown fuse in one phase of primery side(HV) of a three phase transformer( 4169v-460v) in the time of closing its supply breaker. There is no load on the secondery side of the transformer in this moment.

3 Answers   Novachem,

---