Answer / s raghavendra

for different types of applications different kinds of switches are required . for starting of induction motors especially 3-phase squerriel cage induction motors at start it consumes more current to stop that we keep the switch in star position and after it attains 70-80percent of rated speed switch is kept in delta mode as already backemf will be generated which reduces currrent and like this there are many applications......................................

1.In two wattmeter method if one wattmeter shows Negative reading then wat is reason? 2.Wat is the reason for low voltage in houses? 3.Wat is meant by current and voltage? wat is difference between the two?

10 Answers   Engineering,

---

how to identify conection leads of an unknown electric motor

0 Answers  

---

Why we use d.c. meger in a.c. induction motor?

1 Answers  

---

which type of cabel

0 Answers   DMRC,

---

Which type of power plant is more easier to produce electrical power at economical condition?

5 Answers   HAL,

---

Why fuel tanks to be earthed ?

6 Answers   Electronics, Hindustan Petroleum, HPCL, Ispat,

---

What is the deffrence between Siemens S7-300 & S7-400 PLC?

4 Answers   ADC,

---

how to remover corona effect and hysteresis losses from contactor

0 Answers  

---

is a normal conductor can be used a core in windings if not what is the winding core speciality.

2 Answers  

---

why the pressure coil is not present in the three phase wattmeter?

1 Answers  

---

How to select, design,size & calculate for 11 KV/33KV/66KV/132KV/220 KV/440 KV circuit breaker for HT side of transformer protection/HT distribution protection?

0 Answers   Panacea,

---

please tell 1 ton equal to how many kilo watt?? in some converter software's that is 3.5 kw. is it right?

8 Answers   Mitsubishi,

---