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US 4,931,721 AGranted
Device for automatically ascertaining capacitance, dissipation factor and insulation resistance of a plurality of capacitors
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul J. Berrigan, Michael J. Brennan, Jr.
Life of this patent
Estimating the term…
Abstract
Apparatus for automatically measuring and recording, in a seqential manner, various parameters such as capacitance, dissipation factor and insulation resistance, of each of a plurality of capacitors under substantially identical test conditions. The apparatus discharges residual charge on each capacitor.
Claims20
Apparatus for automatically measuring various parameters of each of a plurality of capacitors comprising:
- a predetermined number of test fixtures, each test fixture being adapted to receive one of the capacitors to be tested;
- a plurality of measurement devices each operable to measure at least one predetermined parameter of a capacitor, one of the measurement devices being operative to measure the capacitance and the dissipation factor of the capacitor and a different one of the measurement devices being operative to measure the insulation resistance of the capacitor by measuring the leakage current of the capacitor at a predetermined applied DC electrical potential;
- a relay matrix connected between the test fixtures and the plurality of measurement devices;
- means for energizing predetermined combinations of relays in the relay matrix in accordance with a predetermined sequence thereby to connect predetermined ones of the test fixtures with predetermined ones of the measurement devices;
- and
- control means for asserting the particular one of the measurement devices connected to the particular test fixture via the energized relays in the relay matrix to measure the predetermined parameter of the capacitor.
3 more elements
Dependencies are inferred from the claim text.