How many turns are there in primary winding? (In Transformer)

0 Answers   Philips,

---

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

---

what are the different types of bus bar used at electrical work at shelter

3 Answers   Aster Teleservices, Costco,

---

What is the diffrece between ACB & MCCB

8 Answers  

---

What are the usege & different between UPS & batteries with charging system in in Substation?( UPS 120V AC & battery charger is 120v DC)

1 Answers  

---

How ships are protected from lightning?

1 Answers  

---

At what load maximum effiecency will be obtained Distribution transformer and Genarating transformer Pls clarify?

4 Answers  

---

can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

0 Answers   DEWA,

---

What is the differentional relay...what is the work of this in power Tx. how it is works..

0 Answers   ABB,

---

CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?

22 Answers   L&T,

---

What is the formula that shows relationship between voltage and speed in an induction motor

2 Answers  

---

what is diffrence b/w -48vdc and +48vdc ?

1 Answers  

---