ENTERASYS C2RPS-PSM P0973BP Industrial switches

ENTERASYS C2RPS-PSM P0973BP Industrial switches

The electrical discharge magnitude at the partial discharge point is not a direct measurement for deterioration of the insulating material in this region. Besides the numerical value, the intensity and the waveform of the impulse, regional discharge concentration, the manufacturing and the placing of the insulation also effects the situation. The above evaluations prove that the “partial discharge” measurement is a implementary method to check the quality of whole insulation.

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Creation of partial discharge and measured magnitudes 

In a insulation arrangement, an analogue schematic drawing about the partial discharge takes place in a certain region is shown below. As it can be seen in the figure 8.1, the impulse occurred in the discharge point produces ∆U voltage across the line terminals. This yields a measurable “q” charge in the measurement impedance. This is called apparent charge and is given as pC (Pico-Coulomb). This apparent charge is not equal to the charge in the fault region but it is proportional, however this proportion could not be fixed yet.

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