Answer / raghavendran r

A decrease in Excitation Causes
1) Decrease in Terminal Voltage.
2) Increase in Stator Current.
3) Decrease in Power factor.

If further reduced, it might cause Pole slipping and Gen
coming out of synchronism.

Answer / janardhangc

in the case of synchronus generator by varying the
excitationthe teminal voltage can be varied.but in the case
of the motor the speed can be varied because as we know
that speed is invesly propotional to flux or field strength.

how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....

0 Answers  

---

1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

0 Answers   L&T,

---

Reversal of corrent feature in MCCB- What is reversalof current -explain broadly.

1 Answers  

---

On which side, taps are provided in tap changing transformers and why?

2 Answers  

---

what is the preventive @ predective maintenance

2 Answers  

---

I need a 33/690V Dry type transformer.How to select IP class for this transformer.This will be an outdoor transformer located in a highly polluted environment.

3 Answers  

---

How will calculate the current rating (withstanding capacity)of alumunium and copper cables?

1 Answers  

---

what is the differance between HT motors And LT MOTORS.

0 Answers   Empire Vitrum Glass, Sappi,

---

why neutral used in three phase motor connection?

3 Answers   BEL,

---

what is lrs tank water resistance.

0 Answers  

---

purpose of breaker contact multiplication relay?

5 Answers   ABB,

---

what is the significant for using two types of voltage(line voltage & phase voltage)

1 Answers   NTPC,

---