We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

1 Answers  

---

how wecalculate breaking capcity of acb mcb mccb .explain with example

0 Answers   C&S, L&T,

---

i am swathi, b.tech 4th year. In smps(switched mode power supply)we are using diodes,mosfets,igbts for controling of current. And my question is why we did not use thyristors(scr)? it is also act as a switch,then what is the drawback of scr as compared to above transisters> if we use the scr,then what is happening ? plz give reply as soon as possible bcoz i am doing project on smps. plz frnds i want ans for that. if anybody know the ans plz send to my e-mail id /swathi.tadakapally@gmail.com/

5 Answers   EEE, TCS,

---

what is the working of vfd drives.

2 Answers  

---

kindly arrange to send me RRB Bangalore previous question paper for JE/Electrical and JE/Signal I am going to write exam on 2010

2 Answers  

---

Why grables are put in substation?

1 Answers  

---

From an electrical motor & electrical generator, which has more efficiency & why?

1 Answers   Sahi,

---

IF 5000amp current on LT 440V. then how much it will draw amp on HT 11KV side

10 Answers  

---

three phase 180kva diesel generator can take how much load in amp and what is formula to get this?

13 Answers   lenovo,

---

Frequency of rotor emf in induction motor is around A same as stator frequency B 50% C 5 % or below D 30%

1 Answers   Bhel,

---

what is the difference between multimeter and megger?

3 Answers   Bhel, Metro,

---

what is defference by mcb,mccb and mpcb

4 Answers   Bhel,

---