Answer / mukund

it depend which mccb you have most hase thermal and
megnetic ttrip setting for thermal you cand set may 110 to
120 % of full load amp. and megnetic 3 to 10 time of FLA go
with less time suppose 3 time if mccb trip when load
connected increase little higher

what are the steps involved in generator load test?

0 Answers  

---

why onlyseries motors are used as universal motors? why not shunt?

4 Answers   TCS,

---

derive the e.m.f equation of transformer

2 Answers  

---

How can we measure the residual voltage in dc machines?

0 Answers   GPREC,

---

Active power= VI COS FI But incase of leading power factor ( more than unity), may we use other formula ? because the cos fi (value of cos thita) should not be grater than one.

2 Answers  

---

What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

6 Answers  

---

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,

---

can three phase induction motor rotate with only 2 phases connected

22 Answers   Delta, Mannar Company, Suntron,

---

how hydrogen or helium is a cooling agent for alternator./ generator of big size.

1 Answers  

---

If a HV Underground Cable (13.8KV) is layed in the ground below 1.5 Mtrs and any building construction is done on the Cable route. IS this allowable or Not? What should be the clearance. As per ISO construction on HV cable route is safe or Not? Why? Can any body suggest the site for my question?

1 Answers   ZCL,

---

why neutral and body earthing of transformers kept separated? what is distance between two is required as per is?

6 Answers  

---

Sparking occur when a load is switched off because the circuit has high – a.) Inductance b.) Capacitance c.) Resistance d.) None

3 Answers   Ecil,

---