Answer / gunasekaran

VCB using for high voltage switching ACB for low voltage
switching

Answer / rites

Breakers are designed for various breaking capacity which
in turn is related to arc quenching media.

VCB - vaccum is the arc quenching media and hence can break
high current high voltage supply and hence used in medium
voltage 11/22kv.

ACB - Air is the quenching media and hence used in LT side
i.e 415 v circuits.

what are the types of cooling systems used in motors?

2 Answers  

---

what types battery chargers are there?wanted with details.

3 Answers   SCS,

---

what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)

0 Answers   TATA,

---

Why LVDT have secondary windings connected in differential 1. Higher out put 2. Based on the out put voltage-/+, helps to identify the direction of displacement 3. To establish a null/ reference point

1 Answers   GATE, PSPCL,

---

I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

0 Answers   Elmaco,

---

---

Is current shock due to voltage or current? pls answer

2 Answers   ABB,

---

how system fault level is calculated?

1 Answers   HCL,

---

if the syncronous machine run at leading pf and as its field curret increased its armature current decreased is machine operate as generator or motor?

1 Answers  

---

Explain the power rating of a bulb, say 60W, what if the voltage changes

4 Answers  

---

Why the underground cables will Punchar? or what is the reason to burst the underground cables?

1 Answers  

---

Do you know how to connect a motor of different H.Ps?

5 Answers  

---

the circuit having same properties in either direction is known as.......

2 Answers  

---