Patent ID: 11927618
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. A method of predicting a lifetime of a gas filling of an electrical switchgear, comprising the steps of:
a) measuring a first pressure value p1 in a system of the electrical switchgear containing the gas filling at a predefined temperature Tp at a first point in time t1 and measuring a second pressure value p2 in the system of the electrical switchgear containing the gas filling at the same predefined temperature Tp at a second point in time t2; or,
b) measuring a first pressure value p1 in a system of the electrical switchgear containing the gas filling at a first temperature T1 within a predefined temperature range at a first point in time t1 and measuring a second pressure value p2 in the system of the electrical switchgear containing the gas filling at a second temperature T2 within the same predefined temperature range at a second point in time t2;
calculating a pressure difference Δp between the first pressure value p1 and the second pressure value p2; and,
calculating a lifetime of the gas filling based on said pressure difference Δp, wherein the first pressure value p1 and/or the second pressure value p2 is calculated based on a volume change of a capacitor having an elastomer as a dielectric material between two electrodes of the capacitor.