why we condut tan delta test i want brief explain?
Answers were Sorted based on User's Feedback
Answer / abhijeet
Tan delta is test carried out to check the insulation
proprties. it is nothing but the ratio of watt loss to
reactive power. insulation is a capacitor in series with
resistor. if we plot the phasor of Ir and Ic, we get delta
angle between Ieq and Ic. this angle should be as close as
to zero. as angle increases, the insulation properties gets
damaged and will conduct the current as in resistors.
Is This Answer Correct ? | 14 Yes | 1 No |
Answer / sajid shaikh
Tan delta is called loss angle or dissipation factor
testing,is a diagnostic method of testing winding to
determine the quality of insulation.This is done to try to
predict the remaining life expectancy & in order to
prioritize replacement.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / biswaindu parida
This tests are performed on Transformer Bushings or Ct bushings ( insulators) to check the Insulation properties.
As explained by some of my friends above it is the ratio of Ir/Ic.
Ic- capacitor current of the series of capacitance formed inside the insulators from top to bottom.
Ir- leakage current flowing through it ( which should not be flowing).
Why leakage current?
because no matter in this world is purely capacitive.
We build the insulators such that to perform as a series of pure capacitors. but due to insulation failure or due to dust deposition at the outer surface of bushing during rainy or moisture seasons some leakage current may flow. That is undesirable. thats decreases the performamnce of the insulators.
From Tan-delta test we can know the Ir values in comparision with Ic. It is tolerable upto certain extent, above which we have to take some action to avoid it.
Is This Answer Correct ? | 0 Yes | 1 No |
Why can we connect the mobile charger both ways?
The neutral to earth connection in my industry is showing a zero reading (shorted). I have a machine which has to be installed where neutral to earth is not shorted and shows a leak voltage <3 Volts. Please suggest me how it is possible.
Among the following Which is vector quantity? a. Flux b. permitivity c. flux density d. magnetic intensity
Difference between field rheostat and armature rheostat.
Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.
what is IP55,IP65
why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,
3 Answers NTPC, Servotech, Tata Power,
how can i improve the power factor in domestic (230v)
What is PCCB?
How does an oscillator differ from an amplifier?
10 Mtr Hight of Lighting Arrestar how much area coverd??
is there any difference between protection C.T and measuring C.T?if yes then what is the difference?
4 Answers BARC, Century Rayon,