Answer Posted / ravi prakash

series motors starting torque is very high & hence it should
be started with load only.shunt motor starting torque is
marginal and hence it should be started with least load.

what is spadar bar .why I use in DC generator.

1491

---

what is the series parallel connection of capacitors? and how can we use these application in three phase motors for controlling torque?

1594

---

Why neutral cable carry current.

1530

---

Why it need to form a capcitor when it not been in use from three or two year. Plz describe it technically.

1476

---

can i use ups power as a raw power for another ups

1477

---

---

how can we change the phase angle b/w two phase?

4117

---

This is urgent!! What is a Thyristor-based 3-ways selector switch with Zero crossing control? how does it operate and where is it mostly found in a system?

1593

---

what will happen reduce the transformer voltage from 415v to 406v, is it save the energy,? are this methodis good to reduce the energy.?

1113

---

sir& friends i want the collection of recent quetions asked in interview of top most companies please send me on my email san.jsr@hotmail.com

1356

---

I am having dual speed motor of cromton greaves make of 3.7 KW -1400 rpm and 5 KW - 900 rpm. Please let me know groups and winding connction for rewinding purpose.

1524

---

role of europe union in UK safety legistlation (electrical safety)

1361

---

Explain mechanical rotational system?

649

---

1.4 What is meant by CT knee point voltage and how would you determine it

1170

---

Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

1579

---

How to calculate multiplication factor in kva example 500kva ans pls ?

1402

---