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Device for measurement of the dielectric strength of the insulating oil of transformers, oil chal and other electrical equipment under oil, with the aid of the measuring spark paths and with the use of a foreign haen independently of the present invention, controllable test voltage
Device for measurement of the dielectric strength of the insulating oil of transformers, oil chal and other electrical equipment under oil, with the aid of the measuring spark paths and with the use of a foreign haen independently of the present invention, controllable test voltage