Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / hanupowergrid
TAN DELTA TEST:
A pure insulator when is connected across line and earth, it behaves as a capacitor. In an ideal insulator, as the insulating material which acts as dielectric too, is 100 % pure, the electric current passing through the insulator, only have capacitive component. There is no resistive component of the current, flowing from line to earth through insulator as in ideal insulating material, there is zero percent impurity. In pure capacitor, the capacitive electric current leads the applied voltage by 90°. In practice, the insulator cannot be made 100% pure. Also due to the ageing of insulator the impurities like dirt and moisture enter into it. These impurities provide the conductive path to the current. Consequently, leakage electric current flowing from line earth through insulator has also resistive component.
Hence, it is needless to say that, for good insulator, this resistive component of leakage electric current is quite low. In other way the healthiness of an electrical insulator can be determined by ratio of resistive component to capacitive component. For good insulator this ratio would be quite low. This ratio is commonly known as tanδ or tan delta. Sometimes it is also referred as dissipation factor.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
describe the Operation of induction generators from bus bars
what is the difference between earth leakage and earth fault?
how can maintaince the acb contactor moveing and fixing kit
what are the interview question asked in wind mill about electrical
Atwhat condition reverse power relay will act?
where the lexical paramater will use in fron end?
anyone please send transformer parameter design formulas & details of tap changer ? plz i have interview this week its more helpful for me ?
Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??
I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?
while doing high potential for 11KV 3 core cable how much leakage current will obtain?, what will be acceptance value?
slipring induction motor starting time Lrs operating why lrs starting time lrs outer body didn't get shock
PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.
would the same effect be achieved by reversing the connection to one winding of the induction motor 3-phase?
what is the relationship between current&voltage in practical purpose ?
how much GROUND & NEUTRAL VOLT maintain in data center.
