Insulation testing apparatus of a refrigerating machine

Details Insulation testing apparatus of a refrigerating machine Insulation testing apparatus of a refrigerating machine

1990-01-22

1991-02-05

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

340647, 324511, G01R 3112

Patent

active

049908570

ABSTRACT:
In the self testing refrigerator disclosed, a controller normally controls the operation of various electrical devices, such as a compressor, a blower, and an electric heater by actuating and deactuating separate relays from the power source to each of the devices. During self testing, a switch arrangement disconnects the power source supply and substitutes a high voltage dc generator having a series resistor. The same controller that controls the refrigeration operation of the devices automatically actuates the aforementioned relays separately and successively to apply the high voltage across the terminals of the electric devices and ground. The voltage across the resistor indicates the current flow through, and hence the integrity of, the insulation in each of the devices.

REFERENCES:
patent: 3886409 (1975-05-01), Scarpino
patent: 3946573 (1976-03-01), Nichols et al.
patent: 3986107 (1976-10-01), Dickson et al.
patent: 4140964 (1979-02-01), Eubank et al.
patent: 4540922 (1985-09-01), Horvath et al.

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