Answer / krish

MCB- This it self says that Miniature Circuit Breaker.
MCB's ranges from 1Amps to 63Amps.
MCB's breaking capacity 10KA,15KA & 25KA.
MCB's occupies less space.
MCB's can be used even in the houses.
MCB's can be used with out enclosures but this is safer.
Whereas
MCCB- Moulded Case Circuit Breaker
MCCB's ranges from 32Amps even up to 1200Amps and more.
MCCB's breaking capacity starts from 15KA.
MCCB's occupies more space.
MCC's can't be used for small applications because of its
cost.

for 100 HP Induction motor service factor is 1.2(SF) we placed a VFD at the motor side load is balance with 0.3 Amp's Phase to Phase but at incoming of VFD load is un-balance with 10 to 20 Amp's what will be cause of load un balance

0 Answers  

---

what is the voltage between nutral and earth?

2 Answers  

---

i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

0 Answers  

---

If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

0 Answers   Bajaj,

---

what solid earthing means?

3 Answers  

---

solor panels arrange some angle,panel is flat fitted energy was produced or not why?

0 Answers  

---

what is the maintain in ACB,VCB,MCB,MCCB breakers?

4 Answers   CTS,

---

Why Lightning arrester used? Can we use piece of iron as a core material of transformer, if No, why? In CRGOSS material what is meaning of cold rolled grain oriented? Why Impegrenation of Transformer is done? Properties of Insulator? what is phase angle? Testing of transformers (Routine & Monthly)?

6 Answers   NTPC,

---

what are the standard values for resistances(Megger testing) between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?

1 Answers  

---

What transistor level design tools are you proficient with? What types of designs were they used on?

1 Answers   Intel, Jindal,

---

I am getting differential earth fault in my transformer realy , i have checked all its CT & control wiring but do not get fault, Please help

6 Answers  

---

If 3-Ph motor of same rating connected in Delta & Star for same load one by one then which connection take more current in running (not in starting)for full load.(eg 8.5 KW,3-Ph 400 V)

1 Answers   GE,

---