We have 800KW motor operating at 6600Volt,50 Hz supply.During 1st startup it tripped on overcurrent trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad was set on .94 initially.then we set at 0.97 and then it started fine.i dont understand why it tripped first?What are the protections which comes in picture during starting ?

6 Answers  

---

how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

1 Answers   ACC, Bhel,

---

What is the method to solve circuit using source transformation?

0 Answers  

---

What is meant by shunt current?

1 Answers   ABC,

---

How to control motor gearbox speed and friquency? If length of cable and dia given, how to measure the voltage drop?

0 Answers  

---

what is the difference between RMS meter and normal meter

3 Answers   TATA,

---

Disadvantage of leading power factor

3 Answers  

---

why phase to phase voltage are 290 rather then 440?

1 Answers   Bosch,

---

when voltage increases current decreases & vice versa why it is so?

3 Answers  

---

How to check the cable fault / hv test of transformer cable.

0 Answers   KSEB, L&T, Siemens,

---

Why the transformers are rated in kva?

11 Answers   Birla, NTPC, Reddy Labs, Vijai Electricals,

---

what is cogging and crawling

2 Answers  

---