Answer / gogarlatatarao

Basically starter is used for purpose of limiting the starting current ther by it protect the equipment ( motor and generator)from high current , thus the windings of equipment are protected.
 
If no starter is used then the starting current will be huge which damage winding.
            I.e  v=ir, 
                    I= v/r
                    I=220/0.2 
                    I=1100Amp. which is dangerously high  

Where as in case of transformer to protect it from high inrush currents the windings are mechanically braced to with stand these forces.
That's way no starter is used.

                    AND 
Starter is used where breaking and starting operations occurred mostly.
     But if once we start the transformer we can't break it until any abnormal condition occurred.

Answer / pritish

first of all, starter is used to limit the starting current to a safe value. starter is used in rotating machines. in case of transformer, to protect the winding from high inrush current, the insulation is placed in the winding in a manner called, insulation grading. in this method, the two end terminals are placed with high graded insulation and the grading of insulation goes decreasing when we travel from end to middle of the winding. this is done because, in a transient period, the high current first links to the end terminal and then it comes to the middle terminal. as the time constant of transient is 5time constant, between that interval the high current would have vanished. hence no starter is used in transformer instead, insulation grading is used to protect it from surges.

difference between slippring induction motor and Generator?

1 Answers  

---

Inductor and capacitor ........ power in one phase and ...... it in another phase. if any body found this gaps answer.please sent me to habib_eu2008@yahoo.com

2 Answers  

---

WHY THAT THREE COLORS CHOOSEN IN 3 PHASE? WHAT IS MEAN BY RYB?

2 Answers  

---

What is the minimum setting in REF relay because i am facing some problem whenever power resumes after power failure my transformer is tripping because of REF trip. I am using CSPC make numerical relay(DIP switches). Now setting is 15 percentage. What is the reason for this triping. I sm waiting for answer

2 Answers  

---

how much allowable resistance that can be difference in motor all coils?

0 Answers  

---

what is the mazor difference between the induction transformer and synchonous motor?what is the similarity between them?

1 Answers  

---

What is effect of over voltage and under voltage on ACB

0 Answers   EFS,

---

why ct is testing using dc.. y cant we use AC insted of dc on POLARITY TEST.

6 Answers  

---

What is the minimum load that you can keep in a 3 Phase 40 KVA Diesel Generator? Is it neccessary to load all the 3 phases? Can a phase be left without load?

2 Answers   DRDO,

---

HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.

0 Answers   Areva,

---

how do you find making current and breaking current of the circuit breaker

1 Answers  

---

how can synchronous generator can be used as synchronous condenser?

3 Answers   Monnet,

---