Answer / kumar,abb

hi iam AVR Service engineer .
AVr is heart og genset .its developing & maintain the
genset voltage as constant .its building voltage by
refernce of voltage produce by genset .for Ex: if genset
rated voltage is 11kv means intially genset produce some
minimum voltage (7- 14v)ac only is called resuidual
voltage .
that voltage is input of AVR .avr developing the
voltage upto rated Kv by some programmable circuit in
AVr .that O/p voltage is DC only its called as Excitation
voltage. we fed the excitation voltage to Excitor in
genset.after genset reached rated KV the AVr continusly
maintain the voltage as constant

Answer / satyanarayana raju

AVR MEANS AUTOMATIC VOLTAGE REGULATOR.AVR IS HAVING TWO
INPUT TERMINALS AND TWO OUT PUT TERMINALS OUT PUT IS GIVING
DC VOLTAGE .IT IS CLOSED LOOP CONTROL SYSTEM. I WILL
GIVE ONE EXAMPLE . AVR HAVING TERMINALS LIKE S1,S2, AND
F1,F2. S1 AND S2 ARE INPUT TERMINALS THAT IS CONNECTED TO
OUT PUT OF THE ALTERNATOR VOLTAGE. F1 AN F2 IS CONNEDCTED
TO FIELD OF THE EXITER TERMINALS. I WILL EXPLAIN HOW IT IS
WORKS. EXITER IS COUPLED WITH ALTERNATOR ROTOR. EXITER
FIELD IS HAVING OWN RESIDUAL MAGNITISUM DUE THIS MAGNETISUM
ALTERNATOR GETS SMALL VOLTAGE THAT IS AROUND 10-20VOLTS AT
OUT PUT VOLTAGE. U WANT SEE THIS VOLTAGE REMOVE F1 AND F2
CONNETIONS CHECK VOLTAGE AT OUT PUT TERMINALS. THESE OUT
VOLTAGE IS SENDING TO AVR INPUT TERMINALS THAT IS S1 & S2
THEN AVR GIVES SAME VOLTAGE TO EXITER FIELD THEN EXITER
FIELD GIVES MORE MAGNETISUM DUE TO THIS ALTERNATOR GIVES
MORE VOLTAGE AGAIN THIS VOLTAGE GIVEN TO AVR LIKE THIS
THESE CYCLES GOIES ON UP REACH REQUIRED VOLTAGE OF THE
ALTERNATOR. AT REACHING OUT PUT REQUIRED VOLTAGE AVR IS
NOT SENDING MORE VOLTAGE TO EXITER THERE IS CUTT OF SET
POINT . WHOLE THESE CYCLE TAKEN VERY LESS TIME MEANS MAY
BE 1 SEC. AVR OUTPUT VOLTAGE IS DEPENDS UPON THE COMPANY OF
THE AVR AND REQUIREMTNT OF THE ALTERNATOR. HELLOW FRIENDS
IF U HAVING LITTLE BIT KNOWLEDGE IN ALTERNATOR SIDE U
CHANCES A UNDER STAND THIS INFORMATION IS VERY EASILY. IF U
WANT MORE INFORMATION AGAIN CALL BACK . THNAKING U

Answer / lavanya

automatic voltage regulator

Answer / joel q.

AVR works as a regulator to the output voltage of the
generator. It's main function is to maintain a constant
amount of output voltage of for eg. 220V.

How to calculate load taken by a cable?

3 Answers  

---

how vector surge relay works ?

3 Answers   BFL,

---

in thermal power plant the steam produced is made to cool after falling on the turbine blades. my question is why this is done while the same is needed to heat up again. "jab pani ko wapis garam hi karna hai to thanda kyu karte hai"

11 Answers   Bhel,

---

Which modulation has higher data rates a.fm b.am c.qam d.qpsk

1 Answers   NTDC,

---

Why we use stones in switchyard?

3 Answers   Havells, L&T,

---

what is the speed of a turbine in an hydroelectric power station and how many poles does it have...?

1 Answers  

---

In electrostatic precipitator why positive terminal of tranformer rectifier unit is grounded?

2 Answers  

---

What is balance beam relay ?

2 Answers   Roman,

---

Keywords: Die, Card, Coin, B/N 2 To 12

0 Answers   TCS,

---

what is the problem of generator over voltage.?except automatic voltage regulator card

2 Answers   Siemens,

---

What is the difference between eath fault protection & Restricted Earth fault Protection?

2 Answers  

---

what is the advantage of DC Motor over AC motor & Where its applicable ?

4 Answers   Torrent Power,

---