Answer / lbbs

It seems most answers are ommiting the essential
function/characteristic(ON LOAD).I have a vague idea may be
someone will add.
It is my understating that with this tap changer you can
change winding tap position without breaking/swithing off
the load.This is achieved by the MAKE BEFORE BREAK
mechanism in the tap switch.
Hope someone will add.

Answer / kamlesh

low loss transformer with OLTC how many % losses?

Answer / pinaki chatterjee

O.L.T.C IS NOTHING BUT A SWITCH WHICH CAN BE OPERATE DURING THE TRANSFORMER IS RUNNING AT ANY LOAD WITH OUT ANY PROBLEM.IT FACILITATE THE OUT WILL BE FIXED WHETHER THE INPUT IS VARIABLE

Answer / sreejith

3 is correct

Answer / shanmuganathan

on load tap changer.only used for voltage level increasing
or decreasing in secondary side for transformer side.for
exp:customer need 430v transformer primery side 11kv

Answer / raj lahare

Dear Dnyaneshwar, Please mote that 1)In HV transformers the LV winding is nearer to core and the HV winding is away from Core There fore it is easy for taking the taps .2) The current in HV being lower the switching current in OLTC is low.
Please note. 3)The RTCC means the Remote Tap Change Control Cubical This is installed in Control Room so that the Taps of the Transformer which is installed in Switch Yard can be changed from the Control room only. 4)The RTCC if provided with AVRCR then the taps are changed automatically by sensing the LV voltage. The AVRCR means AUTOMATIC VOLTAGE CORRECTION RELAY. 5) In bigger transformers say Voltage class 220 KV and above the OLTC tap connections are provided on LV side due to the insulation levels of high voltages at the switch.

Answer / savi

OLTC is using for cntrolling transformer output voltage

Answer / puneet

ALL ANS. ARE CORRECT, BUT I WAN TO KNOW THAT WHERE IN THE DISTRIBUTION SYSTEM STEP-UP TRANSFORMER R USED! SO THE OUTPUT SIDE IS NOT HV BUT LV..

Answer / srikanth

OLTC is nothing but Voltage Regulator, as the function of
voltage regulator is to give constant output irrespective of
the input voltage fluctuations.



OVER LOAD TAP CHANGER

Answer / manoj kumar

oltc is on load tap changer. it is typical winding
connecton for a resistor type high speed oltc provided at
the neutral end of eaach phase of windings of a star
connected 3-phase transformer.

how did i get the competency certificate as electricle supervisor. iam completed my b.tech.but i dnt have any experince, this certificate is required for applyng ongc mangement trainees. what should i do sir please suggested me

0 Answers   ONGC,

what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 Answers  

is there a different b\w ground fault CB and earth leakage

1 Answers  

what questions will be asked for 11/33KV licence interview APSEB hyderabad. Can any one share question and answers.

0 Answers  

whether choke act as a voltage regulator in tubelight or not?

1 Answers   Bhel,

How to calulate Locked rotor amper(LRA) for compressor type motors?

0 Answers   MAF Dalkia,

Hi to all... I Want Weight Details of the alternator for making free power energy.

0 Answers   ME,

Explain What will happen when direction of field current is changed (i.e, field excitation is reversed) in the following machines? 1) Alternator 2) Synchronous Motor 3) D.C Generator ( Shunt or Seies ) 4) D.C Motor ( Shunt or Seies )

3 Answers   NTPC, Transco,

How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?

0 Answers  

A 6.6 KV motor breaker is try to Drack OUT by me while the motor running. What will Happened? a, will Trip. b,Drack Out lever will not access c, will get shock d, noting will happened

4 Answers  

what composit error,ratio error,phase error in CT and PT??

4 Answers  

what is the Transformer Impedence?How can calculate?

0 Answers