Transformer TTR test procedure




Answers were Sorted based on User's Feedback



Transformer TTR test procedure..

Answer / vimal m

Transformer Ratio Test
The performance of a transformer largely depends upon perfection of specific turns or voltage ratio of transformer. So transformer ration test is an essential type test of transformer. The voltage should be applied only in the high voltage winding in order to avoid unsafe voltage.
Procedure of Transformer Ratio Test
First, the tap changer of transformer is kept in the lowest position and LV terminals are kept open.
Then apply 3-phase 415 V supply on HV terminals. Measure the voltages applied on each phase (Phase-phase) on HV and induced voltages at LV terminals simultaneously.
After measuring the voltages at HV and LV terminals, the tap changer of transformer should be raised by one position and repeat test.
Repeat the same for each of the tap position separately.
The above transformer ratio test can also be performed by portable transformer turns ratio (TTR) meter. They have an in built power supply, with the voltages commonly used being very low, such as 8-10 V and 50 Hz. The HV and LV windings of one phase of a transformer are connected to the instrument, and the internal bridge elements are varied to produce a null indication on the detector.

Is This Answer Correct ?    0 Yes 0 No

Transformer TTR test procedure..

Answer / a.p.nanjappa

this is a special test.refer to manufacturer.

Is This Answer Correct ?    2 Yes 4 No

Post New Answer




More Electrical Engineering Interview Questions

How many double suspension hardware fittings are required on a double circuit transmission tower?

0 Answers  


Application of DC motors is generally restricted to a few load speed applications because of _____.

0 Answers  


what is the difference between b c d curves on mcb

0 Answers  


how the phase convertor changes the no. of phases

0 Answers  


difference between isolater and circuit breaker?

7 Answers   Adani,






Why we say three phase voltage 440v.

2 Answers   VDP,


what is the formula for hv test for cable and circuit breaker..????

0 Answers  


why only 26v dc is used in aircraft and 115v ac in aircraft.

0 Answers   Jet Airways,


Why we use the D-curve MCBs in critical power distrubution.

4 Answers   Sodexo,


What should be the DC voltage for Hi-pot test on 11kv switchgear

3 Answers  


how will you find out the fuse failure by remote operation?

1 Answers  


Isolation transformer primary to sec turns ratio?

2 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (4637)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3700)
  • Electrical Engineering Interview Questions Electrical Engineering (15765)
  • Electronics Communications Interview Questions Electronics Communications (2636)
  • Chemical Engineering Interview Questions Chemical Engineering (762)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (79)
  • Bio Engineering Interview Questions Bio Engineering (30)
  • Metallurgy Interview Questions Metallurgy (95)
  • Industrial Engineering Interview Questions Industrial Engineering (199)
  • Instrumentation Interview Questions Instrumentation (2879)
  • Automobile Engineering Interview Questions Automobile Engineering (171)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (41)
  • Marine Engineering Interview Questions Marine Engineering (62)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Engineering AllOther Interview Questions Engineering AllOther (1334)