Answer Posted / arun mutharasu

consider a equation ( kvl form in starting period )
V=Eb+IR
at starting time,
the back emf is zero,
so I=V/R,
In case the R is small mean,
eg) v=220 Volt, R=.5 Ohm sub this and get I=440 Amps,
that reason we increase the starting resistance of the
motor using starter.

WHY IN AC DRIVES,INPUT PHASE CURRENT SHOW UNBALANCE?

2230

---

2. What are the parameters of EHT sub-station?

2310

---

What is transister define the transister ammiter ,base, colector.

2170

---

how diside ct mf exmp.200/5 ct

2140

---

what is arc flash and what are the hazards involved

2106

---

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

1994

---

What is expention fastener (Fan)

1984

---

what are the disadvantages in GIS over AIS

2364

---

what are factors comes under relay setting (distance relay 7sa52) under OPEN DELTA VTs connection??

2507

---

r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) Ā

1671

---

What are the advantages and disadvantages of open loop control system?

1056

---

In general bus riser follows the bus section in SWGR. What are impacts if bus section follows bus riser?

1485

---

What is I to C?

2054

---

Write down the name of 2 lady Bir Pratin of Bangladesh

1849

---

Make a list observation on Transformer?

2383

---