which type of motor using in drilling machine ? & who to produce very high torque in drilling machine?

1 Answers   National Drilling Company,

---

How the frame size of a flange mounted AC induction motor is calculated?

0 Answers   APCPDCL,

---

what is difference betwen genrator and alternator?

3 Answers   Tanfac,

---

what is cogging? how it can be controlled?

1 Answers   HCL,

---

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

0 Answers  

---

What is the difference between a Vacuum Circuit Breaker and a Load Break Switch?

7 Answers  

---

Does VT metering core can be used for synchronizing.

1 Answers   Shrishti Power Technologies,

---

how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

0 Answers  

---

why we use star and delta connection?why we donot give the supply directly?

12 Answers   Hitech, Siemens, Tata Steel Limited,

---

why is corona loss greater in a stranded conductor as compared to a solid conductor ?

2 Answers  

---

why stone used in Transformer yard.

9 Answers   Birla, Eskom,

---

Why charcoal and salt add in earthing pit.

6 Answers   Garware, NTPC, Sterling Wilson,

---