Answer / rajevaibhav

Every Generator needs field supply in Rotor. Exciter has
two main parts One is Pilot excitor and other is Main
Excitor. Pilot Excitor consists of Permanent Magnet which
will produce AC Voltage in stator. This voltage is passed
through AVR and Rectifier and given back to the stator of
the Main Excitor, which will induce the AC voltage in
Rotor. This Voltage is passed through the Diode Rectifier
wheel assemble which is mounted on same shaft and Rectified
voltage is given to the Rotor of Generator.
Please note that this ans is relavent to the Power Plant
Generator not DG.

Answer / kj

The above answer is true for DG set also. But sometimes on
small DG the output voltage is used instead of the Pilot
Exciter.

the current will vary with load and also the manufacturer
of the DG.

Often now 1-4 amps but some are 20 to 30 amps.

which relay is used for both detection & correction?(there is only one relay)

2 Answers  

---

One amps in HT is equal to how manys amps in LT

5 Answers  

---

what is the difference between STAR and DELTA connection and application wise how it can be utilizedd ???

1 Answers  

---

what is the difference between megger and earth tester?

28 Answers   Ashok Leyland, IOCL, RRL,

---

Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.

0 Answers   NHPC,

---

What is the difference between the impedance percent and impedance voltage ?

0 Answers  

---

Can earth resistance be measured without connecting the earth electrode? and should earthing connections be disconnected What is the effect of connecting two cables of different sizes in parallel with supply? Thanks in Advance. I am intrested to get in touch with some tecnocrats/engineers,my mail i.d is : hiremathvijay@rediffmail.com

1 Answers  

---

how much current will take for 1kw power. and what is the eqoutiion which is connecting with kw and A.

2 Answers  

---

what is reactive power?

2 Answers   Vestas,

---

power is the product of voltage and current.so we can measure the value of power just by using ammeter and voltmeter.......then why do we use a wattmeter?

5 Answers  

---

How the train speed control?

1 Answers   Bhel,

---

an electric bulb or lamp can operate on ac and dc, if yes then why

5 Answers  

---