Answer Posted / ram sajeevan patel

A softstarter is replica of a star-delta starterin which
starting current is controlled by reducing voltage using ac
voltage controller for smooth starting.As Ac voltage
controllers are not suitable for speed control.So,soft
starters are mainly used for starting purpose only.(since
in Ac voltage controller,frequency is fixed,only voltage
has to be varied.Also,It produces predominant harmonics
into the system.
Where as by using VFD,we can control both voltage and
frequency,so speed control is possible above and below Ns.

Write the analogous electrical elements in force current analogy for the elements of mechanical translational system.

1197

---

current transformer balance the power level on both sides. e.g in case of step up, at secondary side voltage rise but current decrease and vice versa in case of step down transformer. but how this power level remains same in case of current transformer and voltage transformer

1554

---

Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.

2674

---

in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

2805

---

What are hrc fuses and where it is used?

1136

---

how oti and wti connections are different from each other?

2010

---

can some one clearly explain why -48 volt DC use in telecom site????

1634

---

Explain mechanical rotational system?

1067

---

which capacity of RCCB used for five thousand watt electricity load?

1810

---

What aturn on methods of scr?

1118

---

Why L.T.Cable voltage rating is 1.1kV,where as system voltage is 0.415kV?

2294

---

What should be the height of basement according to NBCC code?

2150

---

i want wipro vlsi placement pattern please send me

1720

---

what are the interview question asked in wind mill about electrical

2302

---

How to use computer cpu ups use for home inverter circuit board

1734

---