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
what is per unit calculation?looking for simple and strong explanation thk u
IF HT CAPACITOR IN ON POSITION IS THERE ANY LOSSES I.S I SQURE OCCURS IN THE SYSTEM
placement paper samples of mspl company
Why need 3phase machine double earthing?
What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?
how are reversing the direction of dc motor
do we use links in a dc circuit?if so what s its use in it?
I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.
Why generation voltage in thermal power plant is between 11kv to 33kv?
how to calculation increase capacitor,increase power factor for three phase.
state working of halogen lamp?
Can any body tell me about INNER SHUNT COMPOUND MOTOR diagram?
can you plz send l&t aptitude questions if available its urgent plz plz plz
nwhat are the main Components of servo motor?
How to calculate the copper in HT motors if KW, RPM & Voltage is given
