US 2019/0101521 A1 · Diagnosing Device for On-Load Tap Changing Apparatus, Diagnosing Method for On-Load Tap Changing Apparatus, and Diagnosing Device for Transformer

Abstract

There is provided a diagnosing device for an on-load tap changing apparatus of a transformer, which can diagnose the degradation degree of insulating oil at high accuracy by a relatively simple device configuration. A diagnosing device for an on-load tap changing apparatus has an insulating oil tank in which insulating oil is sealed, a changeover switching device that is disposed within the insulating oil tank and performs the tap changing operation of a tap winding, a tap selector that selects the tap position of the tap winding, and a polarity (transposition) changer that inverts the polarity of the tap winding or a winding connected to the tap winding. The diagnosing device includes an arc discharge light detector that detects arc discharge light that is emitted at changing the tap position of the tap selector. The degradation degree of the insulating oil is diagnosed based on the arc discharge light detected by the arc discharge light detector.

Claims18

Dependent claims

A diagnosing device for an on-load tap changing apparatus having an insulating oil tank in which insulating oil is sealed, a changeover switching device that is disposed within the insulating oil tank and performs the tap changing operation of a tap winding, a tap selector that selects the tap position of the tap winding, and a polarity (transposition) changer that inverts the polarity of the tap winding or a winding connected to the tap winding,

wherein the diagnosing device includes an arc discharge light detector that detects arc discharge light that is emitted at changing the tap position of the tap selector, and
wherein the degradation degree of the insulating oil is diagnosed based on the arc discharge light detected by the arc discharge light detector.

A diagnosing device for a transformer having a transformer tank in which insulating oil is sealed, and an on-load tap changing apparatus that is disposed within the transformer tank,

wherein the on-load tap changing apparatus includes:
a changeover switching device that performs the tap changing operation of a tap winding;
a tap selector that selects the tap position of the tap winding;
and
a polarity (transposition) changer that inverts the polarity of the tap winding or a winding connected to the tap winding,
wherein the transformer includes, within the transformer tank, an arc discharge light detector that detects arc discharge light that is emitted at changing the tap position of the tap selector, and
wherein the degradation degree of the insulating oil is diagnosed based on the arc discharge light detected by the arc discharge light detector.

4 more elements

Dependencies are inferred from the claim text.

Diagnosing Device for On-Load Tap Changing Apparatus, Diagnosing Method for On-Load Tap Changing Apparatus, and Diagnosing Device for Transformer

Life of this patent

Diagnosing Device for On-Load Tap Changing Apparatus, Diagnosing Method for On-Load Tap Changing Apparatus, and Diagnosing Device for Transformer

Life of this patent

Abstract

Claims18