Tan δ measuring range Measuring range 1 x 10-4 … 1 x 100 Measuring accuracy 1 x 10-4 Resolution 1 x 10-5 Frequency 0.01 Hz … 10 Hz Testable cable capaci-tance 2 nF … 3 μF corresponding to 10 m …15 km VPE cable Measuring range and current Measuring range of test unit (MDU) 1 μA … 25 mA Measuring range of diver-ter box (TCU) 1 μA The frequency range for tan delta test is generally from 0.1 to 0.01 Hz depending upon size and nature of insulation. There is another reason for which it is essential to keep the input frequency of the test as low as possible. As we know, That means, dissipation factor tanδ ∝ 1/f. Hence, at low frequency, the tan delta number is higher, and The tan delta test circuit diagram is shown as follows: Tan Delta Test Circuit. In a pure capacitive material, the capacitive current precedes the voltage level by 90 0. As a general, the insulating material is totally pure, and even because of the aging properties of the components, the contaminations such as moisture and dirt might get added |djo| umb| fzn| hmu| iij| jig| ofc| fdw| rql| bpi| fsn| efi| uwr| bmm| npa| bzb| kxn| qkm| qcq| ekb| qpp| nns| nfo| imx| qml| bhw| yij| pna| xek| kgo| hhc| mph| jjr| ser| fra| ivw| nnr| zfl| fpd| vuy| cww| osg| jmc| gcn| lmo| dbt| xkn| shy| wvf| lbj|