what is the max working temperature of an oil filled transformer say of about 1500kva.

3 Answers  

---

advantages & disadvantages of Lagging and leading power factor .

0 Answers   KMSC,

---

battery spicgravity mesuserd?

1 Answers  

---

toughest decision you ever had to make

1 Answers   Infosys,

---

use of automatic voltage regulator & input voltage of it?

1 Answers  

---

---

We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

0 Answers   Siemens,

---

what are different types of alternator and discuss about the methods of cooling

16 Answers   Bhel, Jindal, L&T, Nalco, Vedanta,

---

what is the meaning of 1250 KVA Trasformer

2 Answers  

---

what is the advantage of connecting capacitors in delta than in star?

1 Answers   NTPC,

---

when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 Answers  

---

what percentage of marks in B-TECH is needed for section engineering exam

1 Answers   RRB,

---

Meaning of CTPT ,how it works &how it measures the reading on trivecter meter,&what is trivecter meter

1 Answers   PF, Student, TSSPDCL,

---