Circuit for testing protection devices

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage

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324 72, G01R 3102

Patent

active

041574966

ABSTRACT:
Process and test generator for simulating the operation requirements of a protection device for an AC low, high or very high voltage power network. The generator comprises a voltage branch connected to the protection device for producing a sparkover voltage and an injection branch in parallel with this voltage branch for producing across the device under test a follow current of a value corresponding to the value of the current injected by the power network through this protection device when the latter is in operation. A resonant branch is connected to the injection branch for producing across the terminals of the protection device an alternating voltage corresponding to the voltage of the power network. The generator can also stimulate a long power transmission line and repetitive sparkovers of the device under test. Furthermore, a sparkover of the device can be performed at any phase angle of the power network voltage. The process and the generator are particularly useful for the testing surge arresters.

REFERENCES:
patent: 2888639 (1959-05-01), Petermichl et al.
patent: 3064183 (1962-11-01), Slamecka
patent: 3373350 (1968-03-01), Reece
patent: 3467857 (1969-09-01), Longworth
patent: 3515982 (1970-06-01), Longworth

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