Answer / k.prakashchandra

You can use outside DC source to excite the field

Answer / kj

This is usually done by flashing the alternator. Turn of
load first.
Disconnect the AVR and connect the battery (9-12 volts)
across the field. Must be same polarity as the AVR. Run
generator and check output voltage. Voltage will usually be
higher then normal. if no voltage or unbalanced voltage the
windings or rotating diodes are faulty.
Stop generator and disconnect battery and reconnect AVR.
Try starting generator set again and check if voltage
present. If still not working replace AVR and try again.

How to calculate the sag of OPGW during stringing???

0 Answers  

---

Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only.

12 Answers   ACC, JLL, ZETDC,

---

what is an S.C.R. and how do they work?

4 Answers   GE,

---

Send the control circuit digram of a star delta stater?

1 Answers   L&T,

---

how to calculate transformer load?

0 Answers   Lanco,

---

---

why capacitors cant used in genset to maintain power factor..??

2 Answers  

---

what is impedance?

1 Answers   PWD,

---

what is the difference between neutral and earth

11 Answers  

---

A shopkeeper allows 10% discount on the price of an article and sells it for Rs 7,600. What is the marked price of the article?

1 Answers  

---

what is meant by fuzzy logic? what is fuzzification and defuzzification?

5 Answers   MEIL, Power Grid,

---

what happens if we earth negative electrode of an rectifier transformer used in ESP. In which normaly positive is earthd from inside the xmer.

1 Answers  

---

how maney type tempereture measurement ?

0 Answers   TATA, Tata Motors,

---