Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1983-02-09
1985-08-06
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
340663, G08B 2100, G01R 3102
Patent
active
045338655
ABSTRACT:
A circuit arrangement detects and stores power line faults. The occurrence of sporadic faults as represented, for example, by inadmissibly long network collapses, which could lead to shut-down of a current supply and, therefore, to downtime of a computer are generally difficult to detect because the faults disappear given a return of the network, as does, therefore, the prerequisite for detecting the cause of such faults. For the purpose of detecting the cause of the fault, the rectified power line voltage is supplied to a comparison circuit followed by a signal circuit. The signal circuit is connected to a memory which influences a display. As a result, power line faults remain stored despite the return of the power line input voltage. The circuit arrangement is particularly suitable for use in power supply systems for data processing devices.
REFERENCES:
patent: 3775675 (1973-11-01), Freeze
patent: 4099068 (1978-07-01), Kobayashi
patent: 4340852 (1982-07-01), Togneri
patent: 4389640 (1983-06-01), Dawdy
Krawczewicz Stanley T.
Siemens Aktiengesellschaft
Solis Jose M.
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