Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / 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 |
Post New Answer View All Answers
some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?
can i use 4 number of circuit breaker as single phase manual change over switch? if yes then how plz also send ckt diagram at nazimzamurad@gmail.com
What are dcs and plc?
what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?
what is transistors comprised of?
What is the typical enclosure type used for Indoor switchgear / Outdoor switchgear Units? - In Onshore / offshore Units?
Where can I get CPWD electrical specifications & Shedule of rates? Please help me
Why is ignitor used in sodium vapour lamp
A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.
What is the resistance of the field winding of a d.c. Shunt generator kept low?
Explain the advantages and disadvantages of hydropower plant?
what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?
How much ph is maintained of water resistance starter for slipring induction motor ?
which type of amplifiers are used in multimete?
How to decide DO set rating of Transformer?
