Answer / k.prakashchandra

Only MVAR is present ,calculate current treating it as MVA

what are frequency changers ? Tell me about commertially availble frequency changers ?

1 Answers   GE,

---

is there or does RCCB work for single phase connection?

2 Answers  

---

why voltage form factor of PT are increase , when it is ecpected heigher spikes in system. how it is calculated.

0 Answers   HAL,

---

How the main bus bar rating of 400kV switchyard with one and half breaker scheme is calculated.

2 Answers  

---

What is tan delta & PPM in transformer? and whats its IS value?

0 Answers  

---

define differential current and restraining current in relays. how to calculate it by mathematically? post the formulaes.

4 Answers   Siemens, VPEC,

---

when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

0 Answers  

---

why do power factor in the three phase induction motor increases with the load ???.

3 Answers   Jindal,

---

could mail me the question papers for the test.

1 Answers   ONGC,

---

we have a 2.5hp Starite electric motor water pump,the elec motor burned out,we need to replace starting capacitor(old capacitor specs erased),what microfarad rating capacitor do we need? 110-125V

0 Answers  

---

Why are some relay circuts designed to have the ct current flow through the neutral instead of the phase wire, such as in some diff relays?

1 Answers  

---

in transmission line 11kv is step up or step down? why?

5 Answers  

---