Answer / sabaris

Normally motor takes current at the time of starting is three times of full load current.at this starting time there is no presence of back e.m.f. to compensate this effect of current.so,this much current will affect the motor windings results overheating... due to this we use starters to reduce the starting current at the time of starting..In running say 80% of its speed the back e.m.f. will generated.on that time the full vge is applied to the motor terminals to run its rated speed.
there are many starters are available depends upon the type the motor construction... i.e. star-delta,rotor resistance,autotransformer,2 point and 3 point starters,etc....

How vaccum is formed to create a vaccum interrupter or anything related with vaccum?

6 Answers  

---

How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

0 Answers  

---

what is ring main unit(Rmu)? what is its function

1 Answers  

---

State thevenintheorem?

0 Answers  

---

how we provide neutral earth on synchronising panel as per electrical standards?

0 Answers  

---

how invertor convert the dc into ac give brif detail

0 Answers  

---

1.Why we use choke?If we use for high starting voltage then different type choke gives different voltage. Is it correct?

2 Answers   Dalkia, Luminous,

---

HOW DO YOU CAN CHECK A 15KV DIODE, WHETHER IT IS OK OR NOT?

0 Answers   TMB,

---

What is power factor?

3 Answers   L&T,

---

What is the mulplying factor of trivector meter (11kv) having ct ratio 100/5 amp.

2 Answers  

---

29 Which of the following breaking method save energy? A regenerative breaking B plugging C dynamic breaking D none of above

1 Answers  

---

As you achieve greater success with the company after some years, Will you like to be a share holder in our company?

0 Answers   PESPL,

---