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
Tell me about ur past electrical maintanence job
1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?
What is a compensator?
What will happen if a dc source is given to a tubelight. Will it work or wont it work....
From reading, Under voltage relay used also as phase sequence relay now, Why I use under voltage and phase sequence relay in the same circuit (ATS)?
a battery is having capacity 100AH and 25% charging .if a load taking 10A & connected 6 hour .what is the final condition of the battery.
i am completed diploma in ece,and working in ht and lt lines.so is elligible diploma in ece for get electrical C Licence?plse give ur opinion?
How to minimize the eddy current losses?
Transmission through a short line depends on
is IS says that neutral should be brought to switch box. and this one is a recomended practice
what is auto re-closer?
What are the classifications of heating element?
How to calculate fault level of 11 KV system
how to protect motor in dol starter having capacity of 30 hp.40 hp?
what is the function and use of cable differential protection relay?
