Answer / tariq

The above answer is correct but at some extent. The
connection is switched from Star to Delta when motor
attained it 70~80 percent speed of its full speed. The time
of attaining this speed is counted and the timer is adjusted
accordingly

Answer / dhanesh

It depends on the motor rating. Big motor requires more time
to achieve the rated rpm so the timer can be set to 10-15
sec while for small motors (upto 50HP) it can set to 8-10 sec.

Sir,I have finished my B.E in the Stream of EEE.How Can I get C license for Electrical???Please Tell me the way...My mail ID is praba1003105@gmail.com Cell:7402474123

1 Answers  

---

WHAT IS VFD,FUNCTION, PURPOSE,

2 Answers   RasGas,

---

At what distance power transformer can be placed from generating ?

6 Answers   NTPC,

---

where used of HVDS system.

3 Answers  

---

Difference between stepper motor & induction motor.

1 Answers  

---

what is meant by PU value ? anyone can you explain briefly to me ?

3 Answers  

---

What is the difference between bundled conductors and double circuit?

1 Answers   Power Grid,

---

What happen if LV supply is fed to a HT motor?

19 Answers   ITC Infotech, Jindal,

---

What is the difference between Welding Transformer and Normal Transformer?.

2 Answers   DAE,

---

Can anybody tell the formula to calculate temparature rise in the cable with respect to current?

1 Answers  

---

where we use stardelta starter and dol starter

4 Answers   HCL,

---

why are you use the crgo core lamination in transformer

6 Answers  

---