초록 ▼

A method for determining transient partial discharges in the insulating medium of an electrical power transformer, for example, oil and paper, uses in one embodiment a circular plate inserted in the interior of a transformer tank which picks up partial discharge signals. These are high frequency tra

A method for determining transient partial discharges in the insulating medium of an electrical power transformer, for example, oil and paper, uses in one embodiment a circular plate inserted in the interior of a transformer tank which picks up partial discharge signals. These are high frequency transients which are processed by use of DC notch filters, blocking capacitors and amplified by high frequency amplifiers. The peaks of the partial discharge signal are detected by peak amplifiers, sorted by relative magnitudes, and either displayed or further processed by computer techniques for indicating incipient transformer failure.

대표청구항 ▼

A method of electrically detecting on-site transient partial discharges in the insulating medium of an electrical power transformer or similar electrical equipment including plate means suspended within the tank of said transformer comprising the following steps: sensing electrical signals generated

A method of electrically detecting on-site transient partial discharges in the insulating medium of an electrical power transformer or similar electrical equipment including plate means suspended within the tank of said transformer comprising the following steps: sensing electrical signals generated by said transient partial discharges in the insulating medium by use of said plate means; filtering said signals to reject both direct current and 60 hertz frequencies; detecting the amplitude peaks of each of said signals and providing an indication of their relative magnitudes and frequency of occurrence.