Barras Roebel
The bars are manufactured from special conductors and insulating materials with thermal properties and dielectric rigidity compatible with the operational demands of the machine, as well as acceptance criteria of the standardized tests. For the insulation system of these bars, special composite tapes are applied, such as mica, fiberglass, epoxy and silicone resins that meet the thermal class F/H. Throughout the manufacturing process of a set of bars, one or more prototypes are produced in order to validate the project and the manufacturing process. At this stage the angulations and conformations are analyzed for the perfect fit in the stator slots, according to the project requirements, and thus ensure the quality requirements in rewinding. Only after approval of the prototypes by a battery of tests and trials is that the production of the batch begins.
Roebel Bars
FREE WEBINAR: Generator failure – Root Cause Analysis (RCA) of 2 generators with insulation breakdown
Nishi and Quartzelec would like to invite you to attend the on-line meeting where we will be discussing: Generator failure - Root Cause Analysis (RCA) of 2 generators with insulation breakdown. We will be discussing
PARTIAL DISCHARGE AND CORONA
Present in the daily life of medium and high voltage maintenance teams, this tip presents the conceptual difference of the terms: "Partial Discharge" and "Corona" are terms commonly reported in the electrical and maintenance fields,
Roebel transposition – its importance in large machines
Large generators operate with a high current density due to their high power. Under these conditions, and due to electrical principles, "Foucault" and circulating currents occur, phenomena that arise when conductors are subjected to intense
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