partial discharge

Usually they are displayed in a partial discharge mapping format.

Electrical trees can be detected and located by means of partial discharge measurement.

The intensity of partial discharge is displayed versus time.

Partial discharge measurement can localize the damaged part of an insulated system.

The usual way of quantifying partial discharge magnitude is in picocoulombs.

Partial discharge currents tend to be of short duration and have rise times in the nanosecond regime.

Ultrasonic measurement relies on fact that the partial discharge will emit sound waves.

Additional useful information about the device under test can be derived from a phase related depiction of the partial discharges.

The oil was kept under pressure to prevent formation of voids that would allow partial discharges within the cable insulation.

How do you measure partial discharge?

Voltage depression ("memory effect") from repeated partial discharge can occur, but is reversible through charge cycling.

Bushings sometimes fail due to partial discharge.

A partial discharge measurement system basically consists of:

As the trees start within the insulation, they have no free supply of air which will enable continuous support of partial discharges.

Since lithium-ion chemistry does not have a "memory", you do not harm the battery pack with a partial discharge.

Detection of the high-frequency pulses can identify the existence and location of partial discharge.

Electro Magnetic Field detection picks up the radio waves generated by the partial discharge.

Protracted partial discharge can erode solid insulation and eventually lead to breakdown of insulation.

Data collected during partial discharge testing is compared to measurement values of the same cable gathered during the acceptance-test.

His book Partial Discharge Detection was for twenty-five years the leading text book in this field.

Damages to the insulation and electrical treeing may be detected and located by partial discharge measurement.

A phase-related depiction of the partial discharges provides additional information, useful for the evaluation of the device under test.

What is Partial Discharge?

Corona is a partial discharge and detected in a DGA by elevated hydrogen.

Normal causes of fault gases are classified into three categories: Corona or partial discharge, thermal heating and arcing.