Answer / maheswar prusty

Impedance test is known as short circuit test,from this
test we get the full load copper loss.In this test low
voltage winding is always short circuited and
measurementare should make at the high voltage side.

What should be the overcurrent, instantaneous overcurrent, short cicuit current settings (i.e. how many times of motor full load and what is the time duration) for a motor?

1 Answers  

---

Why 36 KV LA is used in 33 KV Line and 9 KV LA is Used in 11 KV Line

1 Answers   APTransco, Bhel, Wipro,

---

why the transformer ratings in kva or mva?

4 Answers  

---

why the name trunking bus PT

0 Answers   Siemens,

---

in 31.5 mva power transformer how to set of wti and oti?

1 Answers   HMEL,

---

What are locations arc protection relay is fixed.

0 Answers   KSEB, L&T, Siemens,

---

Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.

0 Answers   Piramal Healthcare,

---

why should the lowest unit of a testing transformer ( cascaded transformer ) have higher power rating??

0 Answers   TCS,

---

please explain how to do 'pole drop test' on generator?

0 Answers  

---

when voltage gets down the current of motor increases. but according to Ohm's law voltage is directly proportional to current. plz explain

4 Answers   Maruti Suzuki, TATA,

---

Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?

0 Answers   Jindal,

---

what is the power factor

13 Answers   Heidelberge Cement,

---