Answer / raziq ulla

In ONAN type cooling,in the evening oil temperature is
accumulation of both atmospheric temperature of whole day
and winding temperature, so that temperature of the winding
In the evening is lower than oil temperature. At night due
to cool atmosphere continues till morning temperature of
the oil get down to its normal value and the volume of the
oil in a transformer is higher than the volume of the
winding so the heat generated by the winding is dissipated
by the system easily so that temperature of the winding is
higher than the oil temperature.

Answer / k.prakashchandra

Sun shine and ambient temperature.

Distribution Transformer are connected in configuration? a. Star/delta b. delta/star c. star/star d. delta/delta

7 Answers   IPR, Maruti Suzuki,

---

who invented active elements? plz give me the complte details of active elements...

0 Answers  

---

bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

1 Answers  

---

in how many ways we can make induction motor to run in reverse direction?

5 Answers  

---

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same

1 Answers  

---

---

how do we calculate length of starting time and repeated starting of a direct online starter?

0 Answers  

---

I have applied the post Junior Engineer-iii(c&w)in R.R.B chennaI recently . can i get any model question paper LAST 4 YEARS?

2 Answers   Data Entry Operator, RRB, SSC,

---

What is on line ups and off line ups?

2 Answers  

---

what is PDU in transformer?? which company manufacture??

0 Answers  

---

How will polarity test of Dy5 transformer ?

2 Answers   BSL,

---

PLZ EXPLAIN CORONA,SKIN,BIRD PALE,SPAN,SAG Effects of power cable.

0 Answers  

---

what is zero sequence curr ent ?

4 Answers  

---