what is the rating of Insulation tester for measure 15 KW, 3 phase 415V 50 HZ induction motor?

2 Answers   ABB,

---

How is The split core current transformer working ?

1 Answers   Honeywell, NCC,

---

why dc supply is given to the field of alternator

9 Answers  

---

What is precision of a measurement?

0 Answers  

---

If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

0 Answers  

---

how can we check the earth resistance

3 Answers  

---

How we calculat the NGR of 3phase Generator, Our generation voltage 11KV

0 Answers   MSP, Toyo Denki,

---

In alternator generally we give DC voltage to field of alternator but field (excitor)produce Ac & converts into DC by rotating rectifier(RR ) then fed to rotor .my question is why we cannot give dc voltage directly to rotor instead of Excitor & RR ?

1 Answers  

---

what is the chiller and working principal

0 Answers   Blue Star,

---

What type of a DC motor would you use for a lift?

0 Answers   GE,

---

why the iron chains were hanged at the back or front of the trucks earlier which were touching the earth?

2 Answers  

---

how to select cable size?

7 Answers  

---