Answer / pradeep kumar patel

yes, bcz 1-starting current is (5-6 times)greater than
supply current .2-starting toque is (1.1 times) greater
than normal torque.

Answer / limna

since an induction motor is started on no load,it has a high starting torque.therefore they are switched on by providing high resistance using a starter.and once the motor has reached its rated speed the starter resistance is slowly cut out.

Answer / anilrajkumar

to limit the starting current and thereby reducing the starting torque,preventing the damage to the motor due to high current

Answer / saumil patel

i=(V-Eb)\r
so at starting in induction motor back emf is 0.so current will be more than 5 times of full load current,so it need starter for safely starting....

Answer / avvkishore

safety and protection purpose

What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

17 Answers   Alstom, Call Centre, EDC, HCL, Procon Engineers,

---

How can we findout the maximum efficiancy of Transformer? At which load?

0 Answers   HAL, Tanfac,

---

1.why motor rating in kw instead of KVA? 2.why alternators rating in KVA instead of KW?. 3.why transformer rating in KVA instead of KW?.

6 Answers  

---

What is the Power Plant.

5 Answers   Sail,

---

how could we calculate the no of outgoings from a 800 watt distribution board

0 Answers   United Engineering,

---

---

what is the function of choke and starter in a tube light??

2 Answers  

---

Why transformer neutral earthing? What is advantages?

6 Answers  

---

What is dc current source?

0 Answers  

---

why to use freewheeling diode ( diode in revers bias mode) across dc coil

2 Answers  

---

why CT out put is 5 what ever the primary current.

2 Answers  

---

why voltage swells and dips???

3 Answers  

---

difference between ground,neutral and earth?..

4 Answers  

---