"Corona detection in insulations system-an elementary survey"

From design, production, marketing and end-use points of view it is important that the corona problem, as it relates to electrical devices, be fairly well understood. The object here has been to focus on the four most significant phases of the problem. The principles of the ionization process and stress control are well documented in the literature. Detection-sensitivity requirements, and the corona resistance of insulating materials are related questions that are not as well documented. If the use of more modern insulating materials is desirable for economic reasons, how vulnerable are they to corona attack, or at what level of corona intensity does this cease to be a problem? "Play safe" limits imposed by purchase specifications is not an economic solution to the problem. Competitive instincts which can be justified by evidence of increased life of the end product may be the answer.