Answer / santosh kawade

Backup trip and re-trip are functions use for high voltage
overhead transmission line feeders.

In this system normally fault occurs are very short
durations like fault due to birds or due to fall of some
objects on transmission lines. In this case transmission
line trips due to fault but again breaker auto close after
certain duration (approx. 500 to 1000 milliseconds). But if
fault persist it again trips and will not close
automatically at second time.

Santosh kawade
9224 69 3116

I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

5 Answers   Central Moloney,

---

how one can design armature winding bothh front and back connection

1 Answers  

---

The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

0 Answers   Caterpillar,

---

What's the part of OTCC in transformer?

7 Answers   Bhel, RRB,

---

State the other types of Air Conditioners?

0 Answers   HSL,

---

What is mean by nominal voltage,Explain?.How much nominal voltage?.

1 Answers  

---

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

0 Answers   UltraTech,

---

What is maximum permissible length of cable from transformer (33kV/0.433kV) HT side to HT panel which contain VCB? In which standard i shall get this information.

6 Answers   MSEB,

---

how does a submersible pump work..?

0 Answers  

---

How to Decide the Location of Earth pit for Compressor in Oil Depo? and How to measure the resistance of earth pit Pls explain me with the help of Circuit Diagram?

0 Answers   Triune,

---

what time should we set to come on star contacter in stardelta starter?and for what reason we hav to set such time delay range?

2 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  

---