Answer / naveen

SF6 is like VCB except arcing medium is Sulfer hexa fluride gas which is very good non conductive properties & reduces the arc flash it has all the safty relay I.e- over current.earth fault.sensitive earth fault transformer safty relays master trip relay tcs relay.

Pls tell me what is the exact current conducting capacity of copper and aluminium cables?how much capacity of cables need to 90kw induction motor&how?

1 Answers  

---

If two induction motors A and B are identical except that the air-gap motor 'A' is 50 % greater than that of motor 'B', then

2 Answers   Lanco,

---

WHAT IS EDDY CURRENT LOSSES AND SKIN EFFECT LOSSES IN ELECTRICAL ENGINEERING

1 Answers   GAS,

---

what is the instrument used for measuring insulator RESISTANCE

5 Answers   TATA, Transco,

---

whatis the test procedure for lightning arrester which was installed one year back. i want check it whether it is working or not.

1 Answers  

---

i am going to correct power factor of 1600kw induction motor,when i calculate capacitance of capacitor it is three time more in star connection than delta. if motor is star connected which connection i shall adopt for capacitors and reason for adopt this connection

0 Answers  

---

how to decide the rating of the ct for 1500 kva transformer

1 Answers  

---

Define ohm’s law for a.c (alternating current)?

0 Answers  

---

why resistive load has unity power factor,inductive load lagging and capacitive load leading power factor?

3 Answers   OEG,

---

what is Anti-pumping?

0 Answers  

---

what is difference between Motorised MCCB & ordinary MCCB?

4 Answers   TCL,

---

1> what r different types of fault in cables? How will u locate and test these faults? 2> why earth wire is provided on top throughout the transmission line. why not only on towers? How much area it can protect? 3> what r different types of transmission losses? How power loss can be minimized? 4> what is the % of power loss on transmission lines?

3 Answers   IOCL,

---